grid-automation-ppt-p741_2_3-en-2011_02-0001

GRID

MiCOM Alstom P740 Numerical Busbar Protection

Presentation

Feb 2, 2011

P740 Presentation - P 2

MiCOM Alstom P740Numerical Busbar Protection

MiCOM Alstom P740 is: Fast & Constant

Constant sub-cycle tripping time (13 ms typical)

Flexible & Easy to use Centralised or Distributed solution Dynamic substation replica processing Dynamic substation monitoring tool PSL (Programmable Scheme Logic)

Selective Phase segregated low impedance solution

Secure• Differential algorithms supervised by multiple

criteria (CT supervision, Biased Check Zone, etc…)

• CT saturation detection (< 2ms)• Delayed tripping algorithm with CT saturation • Dead zone protection & 50 BF protection


Busbar Protectio

nOvercurr

ent Protectio

n

Commissioning Tools

CB & Isolator

Supervision

Measurements

Disturbance

Recorder

Event & Fault

recordsProgrammab

le Scheme Logic

Dead Zone

Protection

Continuous monitoring

CT & VT Supervisi

on

MiCOM Alstom P740 Numerical Bus Relay Features Check

Zone

Function Keys

CB Failure Protection

Tricolour LEDs


MiCOM Alstom P740 Architecture

A MiCOM Alstom P740 scheme supports a maximum of:

−

No maximum of Central Units

−

1 Central Unit:

− up to 28 Peripheral Units,

− up to 8 zones (with or without SDEF),

− up to 28 feeders.

Architecture can be either distributed, centralised or mixed

Maximum configuration



HardwareHardware


MiCOM Alstom P740 Architecture

The MiCOM Alstom P740 scheme is made of:

− P741 - Central Unit (CU), • Gathers and processes the measurements from the

PUs with Ethernet board slot, hotkeys & function keys and tricolour LEDs

• (comprises all differential protection algorithms)

− P742 - Peripheral Unit (PU), • Measures and trips with hotkeys• (CT saturation detection, local non-directional

overcurrent, local circuit breaker failure protection and Dead Zone protection)

− P743 - Peripheral Unit (PU),• same as P742 but with additional opto inputs, relay

output and Ethernet board slot, hotkeys & function keys and tricolour LEDs


Numerical Busbar Protection P740

• 8 Optically isolated logic inputs*− Plus 16 virtual inputs

• 8 Relay ouputs* (Plus 16 virtual outputs)

• Optional Irig-B board (GPS Time Sync)

• Up to 7 Communication boards− 4 Peripheral Units per communication board

• 1 Main Processor board & 1 Coprocessor board

− 1p DSP-TMS320C-32 bits-150 Mhz & 1p DSP-TMS320C-16 bits-100 Mhz

• LEDs (18 three-coloured programmable LEDs)

• 10 Programmable Function Keys & 2 Hotkeys− Drives 10 associated ddb signals in PSL

• Back lit liquid crystal display

• Ethernet board slot (IEC 61850-8-1 protocol in 2006)

• * Extended Opto inputs / outputs possible using a P742 or a P743

Central Unit Hardware - Size 19 inches - 4U

P741 Central Unit


• Logic inputs: 16 for P742 (24 for P743)− Universal Opto inputs - programmable battery voltages

• Relay outputs: 8 for P742 (16 for P743)

• Current inputs : 3 phase + 1 residual current inputs− Dual rated current inputs (1/5A)

• Voltage Transformers: 80 - 140Vac ph-ph Soon used...

• 1 Main board - 1p DSP-TMS320C-32 bits-150 Mhz

• 1 Coprocessor board - 1p DSP-TMS320C-16 bits-100 Mhz

• 2 Hotkeys

• NO Ethernet board slot (NO IEC 61850-8-1 protocol)

• 12 LEDs (Red)



Peripheral Unit‘s Hardware - Size 8 inches - 4U

P742 & P743 Peripheral Units



Peripheral Unit‘s Hardware - Size 12 inches - 4U• Logic inputs: 24 for P743 (16 for P742)

− Universal Opto inputs - programmable battery voltages

• Relay outputs: 16 for P743 (8 for P742)

• Current inputs : 3 ph + 1 residual current inputs− Dual rated current inputs (1/5A)

• Voltage Transformers: 80 - 140Vac ph-ph Soon used...

• 1 Main board - 1p DSP-TMS320C-32 bits-150 Mhz

• 1 Coprocessor board - 1p DSP-TMS320C-16 bits-100 Mhz

• Ethernet board slot (IEC 61850-8-1 protocol in 2006)

• 22 LEDs (18 three-coloured programmable LEDs)

• 10 Programmable Function Keys & 2 Hotkeys− Drives 10 associated ddb signals in PSL


P742 & P743 Peripheral Units


MiCOM Alstom P740Central Unit

Main Scheme Differential ElementsMain Scheme Differential Elements

Check Zone Differential ElementCheck Zone Differential Element

Communication MasterCommunication Master

Scheme Stability and Signal ProcessingScheme Stability and Signal Processing

Commissioning FacilitiesCommissioning Facilities

P741

CT Supervision (Circuitry Fault)CT Supervision (Circuitry Fault)


MiCOM Alstom P740Central Unit

Phase segregation +

Sensitive Differential Earth Fault

ABCN

SDEF sensitivity iscontrolled by phase

elements

ibiasph

idiffph

ibiasN

idiffN

Check Zone biased element

[ iinfeed + ioutfeed ]

Main Differential ElementsMain Differential Elements

Optional Voltage criteriaSoon...

Vx< or Vo> iT

iD


MiCOM Alstom P740 Central Unit

Sampling control by saturation detectors

(in Peripheral Unit)

Algorithm tripping decision before CTs saturation

(Max 2 ms)

t

Biased characteristic against differential errors due

to different CTs responses in transient behaviour

(before saturation)

iT

iD

Multiple Confirmation Tripping Criteria

&1

4

Circuitry fault detection

Stability and Signal ProcessingStability and Signal Processing


MiCOM Alstom P740 Central Unit: Trip Logic

CU Tripping Logic decisions (for Zone and Check Zone):

• “Instantaneous Algorithm”:If 2 consecutive samples verify tripping condition

(are above (ID>2) and k x Ibias) AND no CT Saturation detected

• “Delayed Algorithm”*:If all samples verify tripping condition (are all

above (ID>2) and k x IBias) during 5.8 ms AND at least one sample does not verify it in the previous 3.3 ms AND at least one sample verified it in the previous 4,2 ms (i.e. an internal fault is detected if a differential current is detected on 2 consecutive half-periods)

*: never affected by the CT saturation blocking information. This logic is used especially for evolving fault (external to internal bus fault)


MiCOM Alstom P740 Central Unit

Central loading of the topology and setting

software(specific tool)

Up to 4 separate setting groups

Local and remote rear communications

(Courier, IEC 103 via Kitz 2740 (and IEC 61850

soon...))

FacilitiesFacilities



Peripheral UnitsPeripheral Units


MiCOM Alstom P740 Peripheral Units

FacilitiesFacilities

Local AcquisitionLocal Acquisition

Local signal processing (Amplitude and Angle values)Local signal processing (Amplitude and Angle values)

Continuous supervisionContinuous supervision

Saturation detectionSaturation detection

P742/P743

Local ProtectionsLocal Protections


MiCOM Alstom P740 Peripheral Unit

Fault analysisevents, fault & disturbance

records

Programmable Scheme Logic(PSL)

&

& t0

Communication to CU(optical fibre)

PUPUPUPUPU

CU

Up to 4 setting groups

Facilities

CT mixing features


MiCOM Alstom P740Peripheral Units

Current acquisition

Digitalconversion

Sampling 2,400 Hz

A N

Isolatorsand CB statusacquisition

+ supervision

CT supervision(3xIo - IN ) & ID>1 & I

Zero sequencecurrent calculation and other thresholds (PU)

Local AcquisitionLocal Acquisition

VT supervision

(Soon…)


MiCOM Alstom P740Peripheral Units

I > 2 IN > 2

High set O/C detection=

Fast external fault detection

CT magnetic flux calculation

Ø = R idt + ØM

i calculation CT saturation

detection

Instantaneous Signal ProcessingInstantaneous Signal Processing

Optional Voltage criteriaSoon...

Vx< or Vo>


Peripheral UnitLocal Protection

O/C and E/F protections(IDMT or Definite time)

T

t

Dead zone elementPhase & Neutral

Dead ZoneDead Zone

Local ProtectionsLocal Protections

Breaker failure element (1/pole)

with local single pole re-trip

3 x 50 BF3 x 50 BF



SoftwareSoftware


MiCOM Alstom P740Features

Differential protection

• Check zone element with bias characteristic• Circuitry fault criterion with slope : alarm when Idiff is

greater than ID>1 and greater than slope k1.Ibias• One set of parameters for check zone element and an

other one for all the zones (ID>2, k2, IDN>2, kN)• Single setting for IbiasPh> and circuitry fault

supervision (ID>1, IDN>1, and timers) for all zones and check zone elements

• Slopes start from 0 (Is = 0)


MiCOM Alstom P740Excel Spreadsheet tool


MiCOM Alstom P740 Trip Logic in CU

CU Tripping Logic decisions (for Zone and Check Zone):

“Instantaneous Algorithm”:If 2 consecutive samples verify tripping condition (are

above (ID>2) and k x Ibias) AND no CT Saturation detected

“Delayed Algorithm”* (patented algorithm):If all samples verify tripping condition (are all above

(ID>2) and k x IBias) during 5.8 ms AND at least one sample does not verify it in the previous 3.3 ms AND at least one sample verified it in the previous 4,2 ms (i.e. an internal fault is detected if a differential current is detected on 2 consecutive half-periods (20 (60 Hz) or 24 (50 Hz) samples))

*: never affected by the CT saturation blocking information. This logic is used especially for evolving fault (external to internal bus fault)


MiCOM Alstom P740Features

Protection− Dead zone threshold independent of

differential element parameters and to set separately in each PU

− For Single and Phase to Phase Faults with independent time delay


MiCOM Alstom P740 Rear communication

Rear CommunicationRear Communication


P740Rear communication Phase 1

Idiff (A,B,C) + Ibias (A,B,C) + Inputs + Outputs + Events + Disturbance Records…P741

IEC 103 / Fibre/RS 485/RS 232

P743 Kbus/courier Port 3

Kitz274

P742 Per PU connection: I (A,B,C) + Inputs + Outputs + Events + Disturbance Records…

P742

P742


P740Rear communication



OptionsOptions


P740Busbar options


MiCOM Alstom P740 Features

Differential protection− Self-reset of circuitry fault blocking after a

settable delay under normal conditions (option) alarm and blocking zone independently latchable:

• Option to reset automatically or latch independently the Circuitry Fault Alarm

• Option to unblock automatically or block definitively the faulty zone under circuitry fault conditions

− Independent setting for Check Zone and Zone Differential Elements

Independent 87B Blocking Signal in case of circuitry fault or CU-PU communication error or failed PU


P740Busbar options


P740Busbar options

Check Zone Circuitry Fault Mode− Blocking Latched :

• The CZ is blocked and latched until manual reset (and no more circuitry fault) via front panel, opto input, hot key or function key,

• The CZ alarm is latched until manual reset (and no more circuitry fault) via front panel, opto input, hot key or function key.

− Alarm Latched :• The CZ is blocked until automatic reset (when

no more circuitry fault) but• The CZ alarm is latched until manual reset (and

no more circuitry fault) via front panel, opto input, hot key or function key.


P740Busbar options

Check Zone Circuitry Fault Mode− Self-Reset :

• The CZ is blocked until automatic reset (when no more circuitry fault) and

• The CZ alarm is reset automatically at the same time.

− Alarm & No Block :• The CZ is not blocked but• The alarm is latched until manual reset (and no

more circuitry fault) via front panel, opto input, hot key or function key.

− AlarmSR&No Block :• The CZ is not blocked and• The CZ alarm is reset automatically (when no

more circuitry fault)


P740Busbar options


P740Busbar options

Circuitry Fault Mode− Blocking Latched :

• The Zone X is blocked and latched until manual reset (and no more circuitry fault) via front panel, opto input, hot key or function key,

• The Zone X alarm is latched until manual reset (and no more circuitry fault) via front panel, opto input, hot key or function key.

− Alarm Latched :• The Zone X is blocked until automatic reset (when no more

circuitry fault) but• The Zone X alarm is latched until manual reset (and no more

circuitry fault) via front panel, opto input, hot key or function key.

− Self-Reset :• The Zone X is blocked until automatic reset (when no more

circuitry fault) and• The Zone X alarm is reset automatically at the same time.


P740Busbar options


P740Busbar options

Circuitry Blocking Mode− 3phase Blocking:

• A circuitry fault on one phase blocks the three phases

− Blocking / phase:• A circuitry fault on one phase blocks only the

faulty phase• A internal fault on any of the two other phases

will be cleared.


P740Busbar options


P740Busbar options

Check Zone PU error Mode− Blocking Latched :

• The CZ is blocked and latched until manual reset via front panel, opto input, hot key or function key,

• The CZ alarm is latched until manual reset via front panel, opto input, hot key or function key.

− Alarm Latched :• The CZ is blocked until automatic reset (when

the PU communication reappears) but• The CZ alarm is latched until manual reset via

front panel, opto input, hot key or function key.


P740Busbar options

Check Zone PU error Mode− Self-Reset :

• The CZ is blocked until automatic reset (when the PU communication reappears) and

• The CZ alarm is reset automatically at the same time.

− Alarm & No Block :• The CZ is not blocked but• The alarm is latched until manual reset via front

panel, opto input, hot key or function key.− AlarmSR&No Block :

• The CZ is not blocked and• The CZ alarm is reset automatically (when the

PU communication reappears)


P740Busbar options


P740Busbar options

PU error Mode− Blocking Latched :

• The Zone X is blocked and latched until manual reset via front panel, opto input, hot key or function key,

• The Zone X alarm is latched until manual reset via front panel, opto input, hot key or function key.

− Alarm Latched :• The Zone X is blocked until automatic reset (when the

PU communication reappears) but• The Zone X alarm is latched until manual reset via front

panel, opto input, hot key or function key.− Self-Reset :

• The Zone X is blocked until automatic reset (when the PU communication reappears) and

• The Zone X alarm is reset automatically at the same time.


Virtual I/OVirtual I/O


Virtual Inputs/Outputs

16 Virtual Outputs can be used to send information from a PU to the CU− PU->CU Virtual Signal N°n in the CU is a logical OR of the PU->CU Virtual Signals N°n in the PUs

16 Virtual Outputs can be used to send information from the CU to the PUs− CU->PU Virtual Signal N°n in the PU is the CU->PU Virtual Signal N°n in the CU

P74xFeeder

AnyP74x

P741

CU & PU - Virtual Inputs / Outputs

SchemePeripheral Units

Fixed information exchanged between the CU & the PUs: (Busbar Zone 1 … 8 ON/OFF, Busbar Trip 1 … 8 )


DisturbanceDisturbanceRecordsRecords


Disturbance Recorder: Default Setting in CU

MiCOM Alstom P740 Numerical Bus RelayFeature Enhancement


Disturbance Recorder: Default Setting in PU

MiCOM Alstom P740 Numerical Bus RelayFeature Enhancement


MiCOM Alstom P740Numerical Busbar Protection

MaintenanceMaintenance


Maintenance ModesCentral Unit

2 Levels of maintenance in the CU:− 87BB trip blocked but 50BF (back trip) enable

(level 1)− 87BB and 50BF trip blocked (level 2)

It’s a per zone selection

Selectable via front panel, hotkey, function key and opto-coupler

Additional maintenance features selectable via hotkey, function key or opto-coupler:− All the protections (87BB, Dead Zone, General

50BF, Local 50BF, O/C) disabled− 87BB disable but 50BF (back trip) enable for all

zones


2 distinct maintenance levels in the PU:− Local 50BF Trip Blocked (maintenance on an

other bay protection)− Overhaul (maintenance on the PU)

Selectable via front panel, hotkey, function key and opto-coupler

Maintenance ModesPeripheral Units



ToolsTools


MonitoringDynamic Synoptic from CU


MonitoringDynamic Synoptic from PU



ConclusionConclusion


MiCOM Alstom P740Why ?

This product in the MiCOM range offers:This product in the MiCOM range offers:−a complete communicating MiCOM solution

• Courier, IEC 103 and IEC 61850-8-1 (end of 2006)−a new technology

• Dynamic topology• Fast CT saturation detection

−a greater reliability• Constant tripping time independent of type of fault

and number of feeders with or without Voltage criteria• Plant monitoring (CT, VT, CB & Isolator status)• MiCOM Dynamic Synoptic

−a more competitive solution with the reduction of associated costs (engineering and hardwiring)

GRID

www.alstom.com/grid

grid-automation-ppt-p741_2_3-en-2011_02-0001

Documents

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biased check zone

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