iec61850primer

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GE Multilin Copyright

IEC 61850 Primer -Communication Networks

and Systems In Substations

February 16, 2005

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GE Multilin Copyright 2February 16, 2005

61850 Scope

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GE Multilin Copyright 3

February 16, 2005

Abstract Communications Service

Interface ACSI�Defines a set of Objects

�Defines a set of Services tomanipulate and access those objects

�Defines a base set of data types for describing objects

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February 16, 2005

Anatomy of an IEC61850 ObjectName

Physical Device(network address)

Logical Device

(e.g. Relay1)

MMXU1 MMXU2

MXMX

AV

Logical Nodes

Functional Constraint

³MMXU2$MX$A´ =Feeder #2 Current Measurements

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Logical node groups

L System LN (2)P Protection (28)

R Protection related (10)

C Control (5)

GGeneric (

3)

I Interfacing and archiving (4)

A Automatic control (4)

M Metering and measurement (8)

S Sensor and monitoring (4)

X Switchgear (2)

T Instrument transformers (2)

Y Power transformers (4)

Z Further power systemequipment (15)

Examples:

PDIF: Differential protection

RBRF: Breaker failure

XCBR: Circuit breaker

CSWI: Switch controller

MMXU: Measurement unit

YPTR: Power transformer

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Services Examples

� GetData ± Read� SetDataValues ± Write

� GetDataDirectory ± Read list of object names

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ACSI ServicesACSI Services MMS Services

LogicalDeviceDirectory GetNameList

GetAllDataValues Read

GetDataValues Read

SetDataValues Write

GetDataDirectory GetNameList

GetDataDefinit ion GetVariableAccessAttributes

GetDataSetValues Read

SetDataSetValues Write

CreateDataSet CreateNamedVariableLis t

DeleteDataSet DeleteNamedVariableLis t

GetDataSetDirectory GetNameLis t

Report (Buffered and Unbuffered) InformationReport

GetBRCBValues/GetURCBValues Read

SetBRCBValues/SetURCBValues Write

GetLCBValues Read

SetLCBValues Write

QueryLogByTime ReadJournalQueryLogAfter ReadJournal

GetLogStatusValues GetJournalStatus

Select Read/Write

SelectWithValue Read/Write

Cancel Write

Operate Write

Command-Termination Write

Enable

Self Describing

Devices

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IEC61850 Profiles

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IEC61850 DocumentsBasic pr inciples Part 1

Glossary Part 2

Gener al Requirements Part 3

System and project management Part 4

Communication requirements Part 5

Substation Automation System Configur ation Part 6

Basic Communication Structure Part 7

Part 9Sampled Measured Values

Part 8

Conf ormance testing Part 10

Mapping to Ether net

Mapping toMMS and

Ethernet

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IEC61850 ± Primary Parts

Part 6-1: Substation Configuration Language (SCL)

Part 7-2: Abstract Communications Service Interface(ACSI) and base types

Part 7-3: Common Data Classes (CDC)

Part 7-4: Logical Nodes

Part 8-1: Specific Communications Service Mappings(SCSM) - MMS & Ethernet

Part 9-2: SCSM - Sampled Values over Ethernet

Part 10-1: Conformance Testing

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IEC61850 Substation Architecture

MU = Merging Unit

MU

PT1 Optical

CT

MU

PT2 CT2

MU

Optical

PT

Optical

CT

Relay Relay Relay

MU Publishes

V/I/Status

Datasets

Relay(s)

Subscribe to

Datasets

I/O I/O I/O

Station Bus- 10/100/1000 MB Ethernet

Process Bus

.1/1/10GB

Ethernet

Clk1 Clk2

Remote Access

Network

MU = Merging Unit

MU

PT1 Optical

CT

MU

PT2 CT2

MU

Optical

PT

Optical

CT

IE IE IE

MU Publishes

V/I/Status

Datasets

Relay(s)

Subscribe to

Datasets

I/O I/O I/O

- 10/100/1000 MB Ethernet

.1/1/10GB

Ethernet

Clk1 Clk2

Remote Access

Network

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Sampled Measured Values

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. . .

Peer to Peer Communications

Functional Requirements

Bkr 1

Relay

TripBkr 2

Relay

Bkr N

Relay

Bkr 3

Relay

BFI

� Message delivery to multiple devicessimultaneously

� Fast Delivery (< 4ms)

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IEC61850 Generic Object OrientedSubstation Event - GOOSE� Device to multi-devicecommunication ± Local or Wide Area

�Bridgeable but Non-routable

�User-defined Dataset sent inan Ethernet Multicastmessage

�Message sent on change of state as well periodically toenable detection of devicefailure

� Reliability effected throughmessage repeat

GOOSE Header:

� Multicast Address

�Name

�Time Until Next GOOSE�Etc.

User-Defined Dataset

� Status Information

� Analog Values�Data Quality

�Time

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SCL ± Substation ConfigurationLanguage

� Description language for communication in electrical substationsrelated to the IEDs

� XML based language that allows aformal description of

± Substation automation system andthe switchyard and the relationbetween them

± IED configuration

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SCL File Types

SSD: System Specification Description.XML description of the entire system.

SCD: Substation Configuration Description.

XML description of a single substation.

ICD: IED Capability Description.XML description of items supported by an IED.

CID: Configured IED Description.XML configuration for a specific IED.

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February 16, 2005

Benefits of IEC61850

� High-level services enable self-describingdevices & automatic object discovery saving$$$$$ in configuration, setup andmaintenance.

� Standardized naming conventions withpower system context eliminates devicedependencies and tag mapping saving $$$$in config., setup, and maint.

� Standardized configuration file formatsenables exchange of device configurationsaving $$$$ in design, specification, config.,setup, and maint.

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Benefits of IEC61850 - 2

� Higher performance multi-castmessaging for inter-relaycommunications enables functions notpossible with hard wires and save $$$$in wiring and maintenance.

� Multi-cast messaging enables sharing

of transducer (CT/PT) signals saving$$$$ by reducing wiring andconnection costs