official_hrb1119500_06_en_pv monitoring and control system - technical specification

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Schneider Electric Industries SAS Solar Business - 140 Avenue Jean Kuntzmann - 38330 Montbonnot St Martin - France - www.schneider-electric.comDoc. n: HRB1119500

2013SchneiderElectric.

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Conext Control

Monitoring and Control SystemTechnical Specification

Doc n: HRB1119500EN

06 Official 29/01/2013 M. Giraud

K. Nesta

C. Filipe

F. Besancenot D. Segura


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Version /date

Rdig parWritten by

Pages modifiesModified pages

Origine et dsignation de la modificationOrigin and designation of the modification

/ 0 Premire dition / First issue

/ p19, 24, 30, 31, 32, 55, 57, 65, 131, 140 Add of Monitored DC Box (2x10 channels)

& p146

/ p68 to 80, 169 & 173 Update of DCS

p82 Update of the availability level formula

6.6.1 Remove PRref in the ideal energy formula

/ p83 Add ratio of power peak method for ENS calculation

K.Nesta

C.Filipe

Update reports description

Update the SQL database structure

K.Nesta Add the consolidated database structure.

/ 06/01/2013

M. Giraud

Update preconfigured trends

Fichier/file : DRAFT_HRB1119500_05_EN_PV Monitoring and Control System - Technical Specification.doc


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Table des matiresTable of contents

1.

Introduction ................................................................................................................... 7

1.1 Document purpose ........................................................................................................................................ 7

1.2 Reference documents ................................................................................................................................... 7

1.3 Glossary and abbreviations ........................................................................................................................... 8

2. Project Presentation ..................................................................................................... 9

2.1 Array Box ..................................................................................................................................................... 10

2.2 PV Box ......................................................................................................................................................... 11

2.3

Grid Box ....................................................................................................................................................... 12

3. System Architecture ................................................................................................... 13

3.1

General architecture .................................................................................................................................... 13

3.1.1 Architecture with monitored Array Boxes (No monitoring at the DC Box level) ............................... ...................... ..................... ....... 133.1.2 Architecture with monitored DC Boxes (No monitoring at the Array Box level) ................................... ..................... ...................... ... 14

3.2 Grid Box architecture ................................................................................................................................... 153.2.1 RTU Grid Box cubicle ...................................................................................................................................................................... 153.2.2 Server cubicle .................................................................................................................................................................................. 17

3.3 PV BOX architecture ................................................................................................................................... 18

3.4 Monitored DC Box (2x10 channels configuration)....................................................................................... 20

3.5 Array Box configuration ............................................................................................................................... 21

3.6 Data Flows................................................................................................................................................... 22

3.7 Time Synchronization .................................................................................................................................. 24

3.8

Principle Addressing plan ............................................................................................................................ 25

3.8.1 Internet Protocol .............................................................................................................................................................................. 253.8.2 Modbus ............................................................................................................................................................................................ 263.8.3 Profibus ........................................................................................................................................................................................... 27

4. System Measurements and Status ............................................................................ 28

4.1 Array Box ..................................................................................................................................................... 284.1.1 Array Box measurements ................................................................................................................................................................. 284.1.2 Array Box data consolidation ........................................................................................................................................................... 294.1.3 Array Box status .............................................................................................................................................................................. 304.1.4 Array Box orders .............................................................................................................................................................................. 30

4.2

Monitored DC Box (2x10 channels) ............................................................................................................ 31

4.2.1 Monitored DC Box measurements ................................................................................................................................................... 314.2.2 Monitored DC Box data consolidation .............................................................................................................................................. 324.2.3 Monitored DC Box status ................................................................................................................................................................. 334.2.4 Monitored DC Box orders ................... ...................... ..................... ..................... ..................... ...................... ..................... .............. 33

4.3 PV Box ......................................................................................................................................................... 344.3.1 PV Box measurements .................................................................................................................................................................... 344.3.2 PV Box data parameters .................................................................................................................................................................. 374.3.3 PV Box data consolidation ............................................................................................................................................................... 384.3.4 PV Box status .................................................................................................................................................................................. 404.3.5 PV Box orders.................................................................................................................................................................................. 42

4.4

Grid Box ....................................................................................................................................................... 43

4.4.1 Grid Box measurements .................................................................................................................................................................. 434.4.2 Grid Box data consolidation ............................................................................................................................................................. 46

4.4.3

Grid Box status ................................................................................................................................................................................ 474.4.4 Grid Box orders ................................................................................................................................................................................ 50

4.5

Weather station ........................................................................................................................................... 52

4.5.1 Weather Station ............................................................................................................................................................................... 524.5.2 Weather Station data consolidation .................................................................................................................................................. 524.5.3 Weather Station status ..................................................................................................................................................................... 52


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4.5.4 Weather Station orders .................................................................................................................................................................... 52

5. Alarm and events ........................................................................................................ 53

5.1

Generality .................................................................................................................................................... 53

5.1.1

Alarm definition and criteria .............................................................................................................................................................. 53

5.1.2 Alarm annunciation and response .................................................................................................................................................... 545.1.3 Priority determination ....................................................................................................................................................................... 545.1.4 Consequential Alarms ...................................................................................................................................................................... 55

5.2

Alarms of the system ................................................................................................................................... 56

5.2.1 Array Box computed alarms ............................................................................................................................................................. 565.2.2 DC Box (2x10 channels) computed alarms ...................................................................................................................................... 565.2.3 Sensor monitoring ............................................................................................................................................................................ 575.2.4 Maintenance alarm .......................................................................................................................................................................... 57

5.3 Alarms list .................................................................................................................................................... 585.3.1 PV Box ............................................................................................................................................................................................ 585.3.2 Grid Box........................................................................................................................................................................................... 62

6. Functional description ................................................................................................ 65

6.1

Data storage ................................................................................................................................................ 66

6.1.1 PV Box data storage depth .............................................................................................................................................................. 666.1.2 Grid Box data storage depth ............................................................................................................................................................ 67

6.2 Managing the interface with the Grid operation .......................................................................................... 686.2.1 Distributed Control System .............................................................................................................................................................. 686.2.2 Coupling functionality ....................................................................................................................................................................... 726.2.3 Management of Utility requests ........................................................................................................................................................ 766.2.4 Exchanges with the Utility ................................................................................................................................................................ 79

6.3

M&C system communication interface ........................................................................................................ 81

6.4

Specific Inverters management ................................................................................................................... 81

6.4.1 Maintenance mode .......................................................................................................................................................................... 816.4.2 Power derating on high inverter temperature ................................................................................................................................... 81

6.5

Availability Level (AL) calculation ................................................................................................................ 82

6.6

Energy Not Supplied (ENS) calculation ...................................................................................................... 82

6.6.1 Theoretical energy calculation.......................................................................................................................................................... 836.6.2 Referenced performance ratio calculation ........................................................................................................................................ 846.6.3 Solar energy calculation ................................................................................................................................................................... 856.6.4 Alarms monitored for ENS calculation .............................................................................................................................................. 86

6.7 Energy estimation in case of data losses .................................................................................................... 86

7. Human Machine Interface ........................................................................................... 87

7.1

Navigation.................................................................................................................................................... 87

7.1.1 Navigation principle.......................................................................................................................................................................... 877.1.2 Header ............................................................................................................................................................................................. 877.1.3 Footer - Alarm list ............................................................................................................................................................................ 88

7.2 Mimics ......................................................................................................................................................... 89

7.3

Example of mimics ...................................................................................................................................... 90

7.3.1 Sites overview.................................................................................................................................................................................. 907.3.2 Site home mimic .............................................................................................................................................................................. 917.3.3 Grid Box general mimic .................................................................................................................................................................... 917.3.4 Report synoptic ................................................................................................................................................................................ 927.3.5 PV Box general mimic ...................................................................................................................................................................... 937.3.6 PV Box System mimic ...................................................................................................................................................................... 937.3.7 Transformer Cell mimic .................................................................................................................................................................... 947.3.8 Inverter Detailed mimic .................................................................................................................................................................... 947.3.9 Array Box detailed mimic ................................................................................................................................................................. 957.3.10 Alarm mimic ..................................................................................................................................................................................... 967.3.11 Events mimic ................................................................................................................................................................................... 967.3.12 Maintenance mimic .......................................................................................................................................................................... 97

7.4 Trends ......................................................................................................................................................... 987.4.1 Preconfigured trends ........................................................................................................................................................................ 98

7.4.2

User trends .................................................................................................................................................................................... 102

7.5 Reports ...................................................................................................................................................... 1037.5.1 Reporting ....................................................................................................................................................................................... 103

8. SQL Database ............................................................................................................ 120


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8.1 Configuration tables .................................................................................................................................. 1208.1.1 Site (CNF_Site) .............................................................................................................................................................................. 1208.1.2 Weather Station (CNF_WS) ........................................................................................................................................................... 1218.1.3 Grid Box (CNF_GridBox) ............................................................................................................................................................... 1228.1.4 Grid Box Incomer (CNF_GBInc) ..................................................................................................................................................... 1238.1.5

Grid Box Counting cell (CNF_Count) ............................................................................................................................................. 123

8.1.6 Grid Box Coupling (CNF_GBCoupl) ............................................................................................................................................... 1248.1.7 Grid Box Feeder (CNF_GBFeed) ................................................................................................................................................... 1248.1.8 Grid Box LV Transformer (CNF_GBLVTRF) .................................................................................................................................. 1258.1.9 Grid Box UPS (CNF_GBUPS) ................... ...................... ..................... ..................... ..................... ...................... ..................... ..... 1258.1.10 Grid Box LV cabinet (CNF_GBLVCab) ........................................................................................................................................... 1258.1.11 Grid Box (or direct sub-equipments) energy meter (CNF_GBEM) .................................................................................................. 1268.1.12 PV Box (CNF_PVBox) ................................................................................................................................................................... 1268.1.13 PV Box Incomer (CNF_PBInc) ....................................................................................................................................................... 1278.1.14 PV Box Outgoing (CNF_PBOut) .................................................................................................................................................... 1278.1.15 PV Box Feeder (CNF_PBFeed) ..................................................................................................................................................... 1288.1.16 PV Box (or direct sub-equipments) energy meter (CNF_PBEM) .................................................................................................... 128 8.1.17 PV Box MV Power Transformer (CNF_PBMVTRF) ........................................................................................................................ 1298.1.18 PV Box LV transformer (CNF_PBLVTRF) ...................................................................................................................................... 1298.1.19 PV Box UPS (CNF_PBUPS) .......................................................................................................................................................... 1298.1.20 PV Box LV cabinet (CNF_PBLVCab) ............................................................................................................................................. 130

8.1.21

Field (CNF_FLD) ........................................................................................................................................................................... 1308.1.22 Inverter (CNF_INV) ........................................................................................................................................................................ 131

8.1.23 DC Panel (CNF_DCP) ................................................................................................................................................................... 1328.1.24 DC Box (CNF_DCBox) .................................................................................................................................................................. 1328.1.25 Array Box (CNF_AB) ...................................................................................................................................................................... 133

8.2

Measurement tables .................................................................................................................................. 134

8.2.1 Site (MEA_Site) ............................................................................................................................................................................. 1348.2.2 Grid Box (MEA_GridBox) ............................................................................................................................................................... 1358.2.3 Grid Box auxiliary energy meter (MEA_GBEMAux) ........................................................................................................................ 1358.2.4 Grid Box delivered energy meter (MEA_GBEMDel) ....................................................................................................................... 1368.2.5 Photovoltaic Box (MEA_PVBox) .................................................................................................................................................... 1378.2.6 PV Box auxiliary energy meter (MEA_PBEMAux) .......................................................................................................................... 1378.2.7 PV Box delivered energy meter (MEA_PBEMDel).......................................................................................................................... 1388.2.8 PV Box produced energy meter (MEA_PBEMProd) ....................................................................................................................... 139 8.2.9 Field (MEA_FLD) ........................................................................................................................................................................... 140

8.2.10

Inverter (MEA_INV)........................................................................................................................................................................ 141

8.2.11

DC Panel (MEA_DCP) ................................................................................................................................................................... 142

8.2.12 Array Box (MEA_AB) ..................................................................................................................................................................... 1428.2.13 Weather Station (MEA_WS) .......................................................................................................................................................... 143

8.3

Constants tables ........................................................................................................................................ 144

8.3.1 Site type (CST_Site_Type) ............................................................................................................................................................ 1448.3.2 Solar cell type (CST_Solar_Cell_Type) .......................................................................................................................................... 1448.3.3 Relay type (CST_Relay_Type)....................................................................................................................................................... 1458.3.4 Energy Meter type (CST_EM_Type) .............................................................................................................................................. 1458.3.5 Power Transformer type (CST_TRF_Type) .................................................................................................................................... 1468.3.6 Inverter type (CST_INV_Type) ....................................................................................................................................................... 1468.3.7 Array Box number of Array (CST_AB_Nb_Array) ........................................................................................................................... 1478.3.8 Alarms severity (CST_Severity) ..................................................................................................................................................... 1478.3.9 DC Protection Type (CST_DCP_Type) .......................................................................................................................................... 1488.3.10 Electrical Device Type (CST_Device_Type) ................................................................................................................................... 1488.3.11 Weather Station Type (CST_WS_Type)......................................................................................................................................... 149

8.3.12

DC Charger Type (CST_DCC_Type) ............................................................................................................................................. 149

8.4

Alarms table............................................................................................................................................... 150

9. Consolidated SQL Database .................................................................................... 151

9.1 Equipments tables ..................................................................................................................................... 1519.1.1 Field tables ...............................................................................................................................................Erreur ! Signet non dfini.9.1.2 PV Box tables ................................................................................................................................................................................ 1519.1.3 Grid Box tables .............................................................................................................................................................................. 1559.1.4 PV Site tables ................................................................................................................................................................................ 159

9.2

Energy Not Supplied tables ....................................................................................................................... 162

9.2.1 Grid box Time Slices (GridBoxTimeSlices) ...................... ..................... ..................... ..................... ........... Erreur ! Signet non dfini.9.2.2 Grid box Time Slices Details (GridBoxTimeSlicesDetails) .................... ..................... ..................... ........... Erreur ! Signet non dfini.

9.3

PV Site Scrore Card tables ....................................................................................................................... 163

9.3.1

PV Site score card months table (SiteScoreCardMonths) .............................................................................................................. 1639.3.2 PV Site score card years table (SiteScoreCardYears) ................... ..................... ..................... ...................... ..................... ............ 164

Appendix 1: Inputs/outputs with external equipment ......................................................... 165


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Appendix 2: Cubicle description .......................................................................................... 166

1 Environmental withstand ........................................................................................................................... 166

2

Documentation .......................................................................................................................................... 166

3

Supplying the equipment ........................................................................................................................... 166

4

Supplying the digital logic circuits ............................................................................................................. 166

5

Cubicle characteristics .............................................................................................................................. 166

6

Principle of internal cabling ....................................................................................................................... 167

7

Wire ends .................................................................................................................................................. 167

8 Wire colors................................................................................................................................................. 167

9 Identification .............................................................................................................................................. 167

10 Earth .......................................................................................................................................................... 167

11 External connections ................................................................................................................................. 168

12 Equipment inspections .............................................................................................................................. 168

Appendix 3: Technical information about products ........................................................... 169

Appendix 4: Special tools ..................................................................................................... 170

Appendix 5: Training program (OPTION) ............................................................................. 171

Appendix 6: Quality system certificate ................................................................................ 172

Appendix 7: List of MAIN sub vendors & country of Origin ............................................... 173

Appendix 8: AB I/O List ......................................................................................................... 174

Appendix 9: Monitored DC Box I/O List ............................................................................... 175

Appendix 10: PV Box I/O list ................................................................................................. 176

Appendix 11: Grid box I/O list ............................................................................................... 181


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1. Introduction

1.1 Document purpose

This document represents the response by Schneider Electric for the supply of one Monitoring and ControlSystems (M&C systems) for the photovoltaic power plant of To be defined.

To meet the demands set out, Schneider Electric proposes a solution based on an implementation of its standardarchitecture modified if necessary to suit the needs of the To be definedproject.

This modular system based on the most recent technologies, has been specially developed for themonitoring and control of solar power plants. It can be adapted to suit the specific needs of everyplant: The system's structure, together with the expertise of our technical teams, means that

Schneider Electric can offer solutions that are suited to the needs and the demands of all users(bespoke functions, equipment from other vendors, ).

The Monitoring & Control System from Schneider Electric fits into the PV power plant needs by:

Answering to operation requirements of a PV power plant,

Contribution to the maintenance activities,

Checking the efficiency criterias,

Unavailability assessment of PV power plant, Enhancing the reliability of PV power plant.

And also:

Centralizing all of the information available from all of stations,

Monitoring and control components at one or more points,

Historically recording and archiving data, Providing multiple remote accesses.

The response made in our proposal is based on our knowledge and experience of monitoring and control systemsin the PV power plants.

The system is proposed in a standard version that covers all of the requirements of a typical PV power Plant.Should other functions be deemed necessary, then additional options or bespoke functions may be proposed andquoted.

1.2 Reference documents

DR Dsignation Emetteur Numro

DR[1] Photovoltaic System Performance Monitoring -Guidelines for Measurement, Data Exchange andAnalysis

IEC IEC61724

DR[2] Analytical Expression for Daily Solar Profiles IEC IEC61725


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1.3 Glossary and abbreviations

AI Analogue Input

AO Analogue Output

ArrayBox Power connection and measurement box of a photovoltaic field

HMI Human Machine Interface

Modbus Serial Communication protocol

PDC Plant Delivery Cabin, its a Grid Box

IC Inverter Cabin, uts a PV Box

PV Photo Voltaic

string PV arrays connected in serial or in parallel

InB Indicator Board

PLC-RTU Programmable Logic Controller

M&C Monitoring and Control

M&CS Monitoring and Control System


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2. Project Presentation

This project includes the supply of a monitoring and control system for the PV power plant defined with: 1 main GRID BOX connected to the Grid

11 PV BOX connected to 8 ARRAY BOX

The following diagram shows the general electrical architecture of a PV power plant:


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The system is composed of the main following equipments:

ARRAY BOX: this box collects energy coming from the PV panels

PV BOX: this box converts the DC energy into AC energy

GRID BOX: this box is the main station and manage the connection to the electrical network (connectionto the utility).

For each device, the global solution provides the electrical equipments with the necessary protectionrelay and the M&CS in order to design the site according its constraints and customer needs.

2.1 Array Box

The complete range of Array Box is available at Schneider Electric. Here is the synoptic of AB:

The interface with the Monitoring system is a RS485 serial protocol (PROFIBUS). The connexion on this networkallows connecting several AB on the same network:


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2.2 PV Box

The PVBOX integrates the following equipments:

MV Protection : type RM6 NED

Transformer LV/MV

2 inverters : GTE range or XC range DCBOX with or without monitoring

LV Switchboard: embedded the electrical BT distribution and the UPS

M&CS cubicle

Power meter : PM9C for the auxiliary and PM810 for delivered power (option)

Protection relay: SEPAM 10

The following synoptic describes the electrical architecture of one PVBox:


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2.3 Grid Box

The Grid Box integrates the following equipments:

MV Distribution

LV Switchboard: embedded the electrical LV distribution and the UPS

MC&S Cubicle and Server cubicle (in case of local architecture) Power meter : PM9C for the auxiliary and PM810 for delivered power

Protection relay : SEPAM 40, SEPAM 41 or 48

The following synoptic describes the electrical architecture of one Grid Box:


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3. System Architecture

The M&CS architecture is tree-structured as the electrical design of a PV power plant.

3.1 General architecture

There are two types of architectures available:

One with monitoring in the Array Boxes: means no monitoring in the DC Box One without monitoring in the Array Boxes: means monitoring in the DC Box

3.1.1 Architecture with monitored Array Boxes (No monitoring at the DC Box level)

The architecture is the following:

The architecture is based on:

A permanent link between the SCADA Server and all PLC (from PV Boxes or Grid Box)

One PLC for each PV Box and Grid Box

One Web access through a VPN client server firewall (minimum bandwidth recommended: 1Mb/s forupload and 1Mb/s for download) for secure transmission over IP networks

One GSM module to send SMS to maintenance team

One HDSL modem (out of scope of Schneider Electric)

Note:The HDSL modem must have a static IP address


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3.1.2 Architecture with monitored DC Boxes (No monitoring at the Array Box level)

The architecture is the following:

The architecture is based on:

A permanent link between the SCADA Server and all PLC (from PV Boxes or Grid Box)

One PLC for each PV Box and Grid Box

One Web access through a VPN client server firewall (minimum bandwidth recommended: 1Mb/s forupload and 1Mb/s for download) for secure transmission over IP networks

One GSM module to send SMS to maintenance team

One HDSL modem (out of scope of Schneider Electric)

Note:The HDSL modem must have a static IP address


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3.2 Grid Box architecture

The Grid Box is divided into two parts:

1. The RTU cubicle for the control & monitoring of the connexion to the grid2. The Server cubicle (optional: case of centralized architecture)

3.2.1 RTU Grid Box cubicle

The Grid Box RTU is able to manage up to:

2 incomers connected to the grid (depends of the site configuration: by default 1 incomer)

1 MV metering for the MV switchgear with up to 2 power meters:o one PM810 (Schneider Electric scope),o one energy meter from the customer scope

1 coupling cell for the MV switchgear with a protection relay 1 feeder equipped with a power transformer for auxiliaries supply

Up to 6 feeders for the connection to the PV Box (depends of the site configuration: by default 2 feeders).

The RTU Grid Box architecture is the following:

The RTU manages the protection relays and the power meters (auxiliaries and production) of the Grid Box. In caseof specific configuration you can find in the Grid Box RTU cubicle some specific device:

1. Case of local Server in a control room on site: add of a specific switch compliant with MonomodeFiber Optic. It will connect the Grid Box monitoring cubicle to the server cubicle located into acontrol room on site

2. Case of Remote Server (ex. in a datacenter): add of a open VPN device in order to have a securedconnection between the site and the remote server. It will connect the PV site to the server locatedinto a datacenter.

Note:In case of a local server into the GridBox the RTU is directly connected to the server with an Ethernet cuppercable.


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The Grid Box RTU configuration is the following:

The modules used are:

One power distribution module

One CPU module with Modbus & Modbus TCP/IP slots

One DNP3 module

One Modbus TCP/IP module

Two 32 digital inputs module Two 32 digital outputs module One 32 digital inputs module (optional)

One 8 temperature inputs module (PT100, PT1000, )

One 8 analog inputs module (4-20mA, 0-10V, )

Two 32 digital inputs module (optional)

One 16 digital inputs & 16 digital outputs module

One 8 analog outputs (4-20mA, 0-10V, ) module (op tional)


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3.2.2 Server cubicle

The server cubicle is dedicated to SCADA system. It depends of the site configuration:

Local architecture:o SCADA in GRIDBOX: the scada server is integrated on the cabinet in the GRIDBOX. The connection

between the monitoring cabinet GRIDBOX and server local is by cable.o SCADA in local room on site (in a control room for example): The connection between the monitoring

cabinet GRIDBOX and server local is by optic fiber monomode.

Remote: in this case the SCADA is accommodated in a data center (Schneider or not). There is no servercubicle to supply

The server cubicle configuration for local architecture is the following:

In case of a server accommodated into a dedicated room, the switch will be equipped of one monomode opticalfiber connector per Grid Box (by default there is only one Grid Box per site).

The server cubicle embeds:

1 server:o Windows Server 2008 R2o ClearSCADA (SCADA system)o SQL server 2008 R2

1 switch with by default 8 Ethernet ports (fiber optical Monomode or Multimode connectors are optional)

In case of local architecture: one VPN device

1 GSM Modem

1 VPN device for secured connection

Note:In case of a server accommodated into a data center there is no Server Cubicle


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3.3 PV BOX architecture

The PV Box is able to manage up to:

1 Incomer for the MV Switchgear

Up to 4 lines for transformer (configuration by default:1) with a protection relay for each line for the MVswitchgear

1 outgoing line (optional: by default none) for the MV switchgear

1 power meter (PM9C) for measuring auxiliary consumption Up to 2 power meter for the power delivery (optional: by default none) for the PV Box

Up to 8 inverters (configuration by default: only two inverters)

1 power meter per inverter for DC part (optional: by default none)

1 power meter per inverter for AC part (optional: by default none)

32 array boxes split up to 6 lines (configuration by default 4 lines) or 1 Monitored DC Box

The PV Box architecture when the Array Boxes are monitored (i.e. DC Box not monitored) is the following:


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The PV Box architecture when the Array Boxes are not monitored (i.e. DC Box are monitored) is the following:

In any case the PV Box PLC configuration is the following:


One power distribution module

One CPU module with Modbus & Modbus TCP/IP slots

One DNP3 module

One Modbus TCP/IP module One 32 digital inputs module

One 32 digital outputs module

One 8 analog inputs module (4-20mA, 0-10V, )

One 4 temperature inputs module (PT100, PT1000, )

One 32 digital inputs module (optional) One 32 digital outputs module (optional)


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3.4 Monitored DC Box (2x10 channels configuration)

The configuration for the 2x10 channels DC Box is the following:


One network module

One power distribution module One digital outputs six channels module for controlling the switch (Optional)

The Array Box collects:

Up to 20 channels currents

Note:The two voltage measurements are directly collected from the two inverters linked to the monitored DC Box.


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3.6 Data Flows

Three types of data flow are used:

1. ModbusTCP/IP2. DNP33. FTP

The data flows are the following:

The modbus TCP/IP flow is dedicated the real time data flow and for 1 minute data in order to be able to animatethe synoptics of the SCADA and display trends (real time data and 1 minute data). In case of any communicationfailure between the PLC and the SCADA all the data are lost.

Concerning the DNP3 flow, it is dedicated for the alarm and the events. DNP3 is particularly suitable and reliablefor non permanent communications (modem, radio, etc) low bandwidth data exchanges, as they provide highefficiency and robustness in data transfer between SCADA systems and RTU devices. They are basically eventdriven protocols (report by exception, unsolicited messaging, and event management) as compared to traditionalpolling protocols, which help reducing and optimizing data traffic whilst also being efficient for permanentcommunications. All alarms and events are time stamped by the DNP3 module. Moreover in case ofcommunication failure between the PLC and the SCADA, the DNP3 is able to store up to 10000 events and to pushthem to the SCADA when the communication is established.

Finally the FTP flow is dedicated to secured data that have to be stored directly into SQL Data Base. The PLCstores these data into files on its SD Cards and an ftp tool collects them and pushes the data into SQL Tables.More the tool PVDB Engine transfers the alarm table from the SCADA to SQL tables in order to store the alarmsrelated to the PV farm during 20 years.


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These tables synthesis the data flows between the server (which embeds Clear Scada & the PV DB Engine) andeach RTU of the PV Site:

Clear SCADAM340 RTU

(PV Box & Grid Box)PV DB Engine

FTP - Server ClientDNP3 Client (*) Server (*) -

Modbus TCP / IP Client (**) Server (**) -

(*):The M340 RTU uses unsolicited request to send the alarm and events to SCADA: the M340 RTU is in this caseServer. The SCADA uses select before operate request to send oder to the M340 RTU (for example opencommand of a switchgear): the SCADA is in this case Server.

(**):The SCADA is polling the data from each M340 RTU every 2s for real time data, and every 1minute for one

minute data. The SCADA can also send some set points to the M340 RTU by modbus TCP/IP (Non criticalsetpoint).


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3.7 Time Synchronization

In order to consolidate the data (one minute data: average or raw), compare data from one equipment to anotherone and timestamp the alarms, the PLC and the server have to be time synchronised. The time synchronisation ismade by the Network Time Protocol (NTP) to guaranty the synchronisation of the clocks of each system.

The SCADA server will be the NTP server of all equipments of the system. It can find out what the right time is invarious ways including accessing Internet-based Atomic Clocks, using networked timeservers, GPS (The GlobalPositioning System), Radio clocks, and by listening for time broadcasts over a LAN. The way chosen will be relatedto each project.

The time synchronization can be done following two ways:

1. Real time clock2. Software that makes sure your PCs clock tells the right time. It can find out what the right time is in

various ways including accessing Internet-based Atomic Clocks, using networked timeservers,GPS (The Global Positioning System), Radio clocks, and by listening for time broadcasts over aLAN


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3.8 Principle Addressing plan

There are 3 types of addressing:

1. IP: dedicated to PLC Communication modules, SCADA Server and Gateways2. Modbus: dedicated to protection relay, power meter and inverters3. Profibus: dedicated to AB

3.8.1 Internet Protocol

The principle addressing plan is the following:

Network address rules

Equipment type @IP min @IP maxEquipment

max amount

PC, Server, VPNmodem, 10..0.1 10..0.254 254

PVBOX 10..1.xxx 10..100.xxx 100

GRIDBOX 10..101.xxx 10..110.xxx 10

CPU 10...1 1

NOR 10...2 1

NOE 10...3 1

PRM 10...11 10...20 10

TSXETG100 10...21 10...40 20

Ethernet switch 10...41 10...50 10

DC Box STB island 10...51 10...60 10


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3.8.2 Modbus

To easily identify each equipment on a modbus network the modbus address plan for the GridBox is the following:

Gateway EQT @MB

GridBox Ethernet / Modbus (PROT) TSXETG100 1 EM_DEL_01 30

EM_DEL_02 31

EM_AUX 20

S48 40

GridBox Ethernet / Modbus (PROT) TSXETG100 2 S40/S41_01 50

S40/S41_02 51

GridBox Ethernet / Modbus (PROT) TSXETG100 3 T20/S41_01 60

T20/S41_02 61

T20/S41_03 62

GridBox Ethernet / Modbus (PROT) TSXETG100 4 T20/S41_04 63

T20/S41_05 64

T20/S41_06 65

Concerning the PV Box the modbus address plan is the following:

Gateway EQT @MB

PVBox Ethernet / Modbus (INV1) TSXETG100 1 GT500 200

XC500 248


XC500 248


XC500 248


XC500 248


XC500 248


XC500 248


XC500 248


XC500 248

PVBox Ethernet / Modbus (EM, AUX, PROT) TSXETG100 9 EM_PROD_01 1

EM_PROD_02 2S10_1 10

EM_AUX 20

EM_DEL_01 30

EM_DEL_02 31


EM_PROD_04 4

S10_2 11


EM_PROD_06 6

S10_3 12


EM_PROD_08 8

S10_4 13


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3.8.3 Profibus

The principle addressing plan is the following:

Gateway EQT @PBS

PVBox Profibus Remote Master 1 PRM 0

AB_ii ii


AB_ii ii


AB_ii ii


AB_ii ii


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4. System Measurements and Status

The objective of the Monitoring is to provide the measures (meteorology and electrical) and the status (state of theelectrical equipments) of the global system.

4.1 Array Box

4.1.1 Array Box measurements

The measurements are the following:

Real Time data 1 minute data SQL Data StorageArray 01 current Yes Average MEA_ABArray 02 current Yes Average MEA_ABArray 03 current Yes Average MEA_AB

Array 04 current Yes Average MEA_ABArray 05 current Yes Average MEA_ABArray 06 current Yes Average MEA_ABArray 07 current Yes Average MEA_ABArray 08 current Yes Average MEA_ABArray 09 current Optional Average MEA_ABArray 10 current Optional Average MEA_ABArray 11 current Optional Average MEA_ABArray 12 current Optional Average MEA_ABArray 13 current Optional Average MEA_ABArray 14 current Optional Average MEA_ABArray 15 current Optional Average MEA_AB

Array 16 current Optional Average MEA_ABArray Box current Yes Average MEA_ABArray Box Voltage Yes Average MEA_ABArray Box Internal Temperature Yes Average MEA_ABPV Modules Temperature Optional Average MEA_ABPlane solar Irradiance N1 Optional Average MEA_ABPlane solar Irradiance N2 Optional Average MEA_AB

Note:The number of array currents depends of the type of the array box (8 arrays, 12 arrays or 16 arrays).


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4.1.2 Array Box data consolidation

Based on the measurements for each AB the system calculates:

AB DC power

One minute Energy

The data consolidate are the following:

Real Time data 1 minute data SQL Data StorageArray Box DC Power Yes Average -Array Box Energy - Raw MEA_AB

4.1.2.1 DC Power

For each sample for voltage measurement and array current measurements the power is the following:

1000

ion_ArrayConfigurat

16

1

ArrayIABU

(kW)P

i

i

i=

=

With:

Configuration_Arrayi is refers to the use of this array

UAB refers to the voltage of the AB

IArray i refers to the current of the array i

4.1.2.2 One minute Energy

The one minute Energy is calculated from Power samples. The calculation is the following:

60

AvgMnP)kWh(MnE =

With:

PAvgMn: Power one minute average (expressed in kW)


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4.2 Monitored DC Box (2x10 channels)

4.2.1 Monitored DC Box measurements


Real Time data 1 minute data SQL Data StorageVoltage - Module 1 (*) Yes Average MEA_DCPChannel 01 current Module 1 Yes Average MEA_DCPChannel 02 current Module 1 Yes Average MEA_DCPChannel 03 current Module 1 Yes Average MEA_DCPChannel 04 current Module 1 Yes Average MEA_DCPChannel 05 current Module 1 Optional Average MEA_DCPChannel 06 current Module 1 Optional Average MEA_DCPChannel 07 current Module 1 Optional Average MEA_DCPChannel 08 current Module 1 Optional Average MEA_DCPChannel 09 current Module 1 Optional Average MEA_DCPChannel 10 current Module 1 Optional Average MEA_DCPVoltage - Module 2 (*) Yes Average MEA_DCPChannel 01 current Module 1 Yes Average MEA_DCPChannel 02 current Module 1 Yes Average MEA_DCPChannel 03 current Module 1 Yes Average MEA_DCPChannel 04 current Module 1 Yes Average MEA_DCPChannel 05 current Module 1 Optional Average MEA_DCPChannel 06 current Module 1 Optional Average MEA_DCPChannel 07 current Module 1 Optional Average MEA_DCPChannel 08 current Module 1 Optional Average MEA_DCP

Channel 09 current Module 1 Optional Average MEA_DCPChannel 10 current Module 1 Optional Average MEA_DCP

(*):The voltage measurements are collected from the two inverters connected to the DC Box

Note:The 2x10 channels DC Box will consider by the system as two DC panels (module 1 & module 2). Thus forone DC Box there are always two items inside the SQL Table MEA_DCP (Please refer to 8.2.11).


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4.2.2 Monitored DC Box data consolidation

Based on the measurements for each DC Boxes the system calculates:

DC Box DC power per module (2 DC power) One minute Energy per module (2 One minute Energy)

The data consolidate are the following:

Real Time data 1 minute data SQL Data StorageDC Power Yes Average -One minute Energy - Raw MEA_DCP

4.2.2.1 DC Power

For each sample for voltage measurement and channel current measurements the power per module is thefollowing:

1000

lion_ChanneConfiguratIU

(kW)P

10

1ChannelINV

Module

ii

i=

=

With:

Configuration_Channeli: refers to the use of the channel i

UINV: refers to the voltage of the module (measurements coming from the inverter connected to the

module) IChannel i refers to the current of the channel i

4.2.2.2 One minute Energy

The one minute Energy per module is calculated from Power samples per module. The calculation is the following:

60

P)kWh(E

AvgMnMn =

With:

PAvgMn: Power one minute average (expressed in kW)


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4.2.3 Monitored DC Box status

None

4.2.4 Monitored DC Box orders

None


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4.3 PV Box

The RTU on the PV Box concentrates data coming from:

MV switchgear: one incomer, one feeder (up to 4 per PV Box) and one outgoing (optional)

Protection relay on each feeder

Energy meters for the PV Box (up to 2 per PV Box) MV Transformers

Inverters

DC Box (for DC protection)

Low voltage cabinet with its energy meter for auxiliaries consumption

UPS Meteorological measurements (irradiance, temperatures)

4.3.1 PV Box measurements

4.3.1.1 Meteorological data


Real Timedata

1 minute data SQL Data Storage

Solar irradiance Optional Average MEA_PVBoxTemperature from pyrano sensor Optional Average MEA_PVBoxInternal Temperature Optional Average MEA_PVBoxExternal Temperature Optional Average MEA_PVBoxInternal Temperature 1 Optional Average MEA_PVBox

Internal Temperature 2 Optional Average MEA_PVBoxInternal Temperature 3 Optional Average MEA_PVBoxInternal Temperature 4 Optional Average MEA_PVBoxInternal Temperature 5 Optional Average MEA_PVBoxInternal Temperature 6 Optional Average MEA_PVBox

4.3.1.2 Protection Relay (Sepam 10)


Real Timedata

1 minute data SQL Data Storage

Phase current IA (x10) Yes - -Phase current IB (x10) Yes - -Phase current IC (x10) Yes - -Measured earth fault current Io (x10) Yes - -Thermal capacity used Yes - -Phase A tripping current Yes - -Phase A tripping current Yes - -Phase A tripping current Yes - -Measured earth fault current Io Yes - -


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4.3.1.3 Energy Meter (Auxiliary and Delivery)


Real Timedata

1 minutedata

SQL DataStorage

Auxiliary - Phase 1 current Yes - -Auxiliary - Phase 2 current Yes - -Auxiliary - Phase 3 current Yes - -Auxiliary Line to line average voltage Yes Average MEA_PVBoxAuxiliary Active power Yes - -Auxiliary Total active energy accumulation Yes Delta MEA_PVBoxEM1: 3 phases current average Optional - -EM1: 3 phases line to line average voltage Optional Average MEA_PVBoxEM1: Total active power Optional - -

EM1: Total reactive power Optional - -EM1: Frequency Optional Average MEA_PVBoxEM1: Active energy produced by PVBox (**) Optional Delta (*) MEA_PVBoxEM1: Reactive energy produced by PVBox (**) Optional Delta (*) MEA_PVBoxEM1: Active energy consumed by PVBox (**) Optional Delta (*) MEA_PVBoxEM1: Reactive energy consumed by PVBox (**) Optional Delta (*) MEA_PVBoxEM2: 3 phases current average Optional - -EM2: 3 phases line to line average voltage Optional Average MEA_PVBoxEM2: Total active power Optional - -EM2: Total reactive power Optional - -EM2: Frequency Optional Average MEA_PVBoxEM2: Active energy produced by PVBox (**) Optional Delta (*) MEA_PVBoxEM2: Reactive energy produced by PVBox (**) Optional Delta (*) MEA_PVBox

EM2: Active energy consumed by PVBox (**) Optional Delta (*) MEA_PVBoxEM2: Reactive energy consumed by PVBox (**) Optional Delta (*) MEA_PVBox

(*):The M340 RTU calculates a one minute energy from the cumulated energy collected on the device (pleaserefer to chapter 4.3.3.1 Energy meters (delivery only)). However this is the cumulated energy that it stored intoMEA_PVBox from SQL data base. Indeed in case of lost of communication between the PLC and the energymeter, the energy is still cumulating the energy. When the communication is recovered we can estimate minute byminute what has been consumed or produced.

(**):The energy measurements coming from energy meter are cumulated energy. In order to avoid lost of precisionthese data are split into 4 integers (for EM1 and EM2 only not available for auxiliary). Thus the energy meter isable to cumulate up to 9999 9999 9999 9999 Wh. The energy are displayed into REAL format for the real time

data because we dont need precision for displaying data on a synoptic but are stored in a FLOAT format intoSQL to guaranty the precision of the measurement (these data can be used for reporting, performance calculation).


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4.3.1.4 Inverters


Real Timedata

1 minutedata

SQL DataStorage

Inverter matrix temperature Yes Average MEA_INVPV current Yes Average MEA_INVPV voltage Yes Average MEA_INVPV Power Filtered Yes - -AC voltage between phase A and phase B Yes - -AC voltage between phase B and phase C Yes - -AC voltage between phase C and phase A Yes - -Phase A current Yes - -Phase B current Yes - -

Phase C current Yes - -Real power Yes - -Reactive power Yes - -Grid frequency Yes Average MEA_INVPercentage of I Max in PPT mode Yes - -Phase angle Yes - -


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4.3.2 PV Box data parameters

4.3.2.1 Inverters

The user settable parameters are the following:

Real Timedata

1 minutedata

SQL DataStorage

Maximum AC voltage Yes - -Minimum AC voltage Yes - -Frequency high trip point Yes - -Frequency low trip point Yes - -Maximum ground current Yes - -PV voltage regulator reference Yes - -

PV starting voltage Yes - -Time delay for start Yes - -Time delay for stop Yes - -PV stopping power Yes - -Percentage of I Max in manual mode Yes - -Power tracker execution rate Yes - -Power tracker voltage step Yes - -


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4.3.3 PV Box data consolidation

4.3.3.1 Energy meters (delivery only)

Based on the measurement from the energy meters the system calculates one minute energy. The measurementsare the following:

Real Timedata

1 minutedata

SQL DataStorage

One minute active energy produced - Raw -One minute reactive energy produced - Raw -One minute active energy consumed - Raw -One minute reactive energy consumed - Raw -

A one minute energy is calculated as following:

1mn)-(tAccMnE-)t(AccMnE)t(MnE =

Where EAccMn(t) refers to the cumulated energy for minute t

4.3.3.2 Inverters

Based on the measurements from inverter the system calculates:

line to line voltage if no power meter is used

PV energy if no power meter is used

Active energy and reactive if no power meter is used.


Real Timedata

1 minutedata

SQL DataStorage

3 phases line to line average voltage (*) Yes Average MEA_INVPV Energy one minute accumulation (**) Yes Accumulation MEA_INVAC Active energy one minute accumulation(*) Yes Accumulation MEA_INVAC - Reactive energy one minute accumulation(*) Yes Accumulation MEA_INV

(*):the data can come from dedicated AC Energy Meter(**):the data can come from dedicated DC energy meter


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4.3.3.2.1 Accumulated one minute energy

In case of no power meter used the accumulated energy one minute average is calculated as following:

60

AvgMnPAccMnE =(kWh/h)

With PAvgMn is the power one minute average (kW) calc

The active energy on minute accumulation is calculated from Active Power samples, the reactive energy on minuteaccumulation is calculated from Reactive Power samples and the PV energy one minute accumulation is calculatedfrom PV power filtered samples.

4.3.3.2.2 Line to line average voltage

The line to line average voltage is calculating by summing the three phases voltage divided by 3:

3

CAUBCUABUAvgLLU ++

=(V)

With:

UAB is AC voltage between phase A and phase B

UBC is AC voltage between phase B and phase C

UCA is AC voltage between phase C and phase A

The line to line average voltage averaged one minute is calculated from line to line to line average voltagesamples.


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4.3.4 PV Box status

The PV Box statuses are the following:

PV Box - Emergency stop

PV Box - Fire Alarm

PV Box - Doors synthesis closed

PV Box - Monitoring Switch OK

4.3.4.1 Low Voltage Cabinet

The statuses are the following:

LV Cabinet - NP Aux. Synthesis OK

LV Cabinet - Priority Aux. Synthesis OK

LV Cabinet - Array Boxes Supplies Synthesis OK

LV Cabinet - Fire / Video circuit breaker OK

4.3.4.2 UPS


Fault Synthesis

On battery

Low battery

By-Passed

4.3.4.3 MV Transformer


Alarm Fault trip


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4.3.4.4 Switchgears

4.3.4.4.1 Incomer


MV Fault (Flair)

Mode Local / Remote Depends on the Incomer configuration: by default not used

Switch disconnector close Depends on the Incomer configuration: by default not used

Earthing switch close Depends on the Incomer configuration: by default not used

Auxiliary supply fault Depends on the Incomer configuration: by default not used

4.3.4.4.2 Feeder


Mode Local / Remote By default coming from protection relay

CB or Switch Close By default coming from protection relay

Earthing switch Close

Line Disconnector Close Depends on the MV Line configuration: by default not used

Fuse OK Depends on the MV Line configuration: by default not used

Earth Fault Depends on the MV Line configuration: by default not used

Sepam Watch Dog

Aux. Supply fault

NP Aux. Supply fault Depends on the MV Line configuration: by default not used

4.3.4.4.3 Outgoing (optional)


Mode Local / Remote Depends on the Outgoing configuration: by default not used Switch disconnector close Depends on the Outgoing configuration: by default not used

Earthing switch close Depends on the Outgoing configuration: by default not used

Voltage presence (Flair) Depends on the Outgoing configuration: by default not used

MV Fault (Flair) Depends on the Outgoing configuration: by default not used

Auxiliary supply fault Depends on the Outgoing configuration: by default not used

4.3.4.5 Feeder Protection relay

The statuses collected by communication are the following:

Mode (Local/Remote)

Circuit breaker (Open/Close)

All protection statuses

The statuses collected by wired signals are the following:

Protection relay watchdog

4.3.4.6 Inverters


System state

Goal state

DC switch state (open/close) Option (not available for GTxxxE inverter nor XC inverter)

AC switch state (open/close) Option (not available for GTxxxE inverter nor XC inverter)

DC/AC switch disconnector Option (not available for GTxxxE inverter nor XC inverter)


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4.3.5 PV Box orders

4.3.5.1 Inverters

The commands are the following:

Start order

Stop order

Reset fault

Power tracking enable

Mode (Maintenance / Automatic)

Communication locking

4.3.5.2 Incomer


Open Depends on the configuration: by default not used

Close Depends on the configuration: by default not used

Reset MV Fault (Flair)Depends on the configuration: by default not used

4.3.5.3 Feeder


Open Depends on the configuration: by default open order by the protection relay

Close Depends on the configuration: by default close order by the protection relay

4.3.5.4 Outgoing (optional)

The commands are the following: Open Depends on the configuration: by default not used

Close Depends on the configuration: by default not used

Reset MV Fault (Flair) Depends on the configuration: by default not used

4.3.5.5 Feeder Protection relay


Open circuit breaker

Close circuit breaker

Reset


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4.4 Grid Box

The RTU on the Grid Box concentrates data coming from:

MV switchgear: Up to 2 Incomers (by default 1), 1 Feeder transformer, 1 coupling cell (depends on theconfiguration: Optional), 1 measurement voltage cell, Up to 6 feeders (by default 2)

Protection relay on Incomers (optional), coupling cell and feeders (optional)

Energy meters for the Grid Box (up to 2 per Grid Box)

MV Transformer for auxiliary supply

Low voltage cabinet with its energy meter for auxiliaries consumption

UPS

Meteorological measurements (irradiance, temperatures)

Interface with the Utility (orders from the utility: coupling authorization, active power regulation, reactivepower regulation )

4.4.1 Grid Box measurements

4.4.

official_hrb1119500_06_en_pv monitoring and control system - technical specification

Documents