iec 61850 overview for users

7/31/2019 IEC 61850 Overview for Users

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IEC 61850 CommunicationNetworks and Systems In

Substations:An Overview for Users

SIPSEP 2004Monterrey, Nuevo Len, Mxico

Mircoles 10 de Noviembre, 2004

Drew Baigent Mark Adamiak Ralph Mackiewicz

GE Multilin GE Multilin SISCO, Inc.

Markham, Ontario King of Prussia, PA Sterling Heights, MI


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Agenda IEC61850 Overview

Benefits Standards Structure

Objects

Services

UCA2-IEC61850 Migration Comparison of terminology

Object Model Differences

Impact on client applications


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Why IEC61850?

High-level services enable self-describing

devices & automatic object discovery saving$$$$$ in configuration, setup and maintenance.

Standardized naming conventions with power

system context eliminates device dependenciesand tag mapping saving $$$$ in config., setup,and maint.

Standardized configuration file formats enablesexchange of device configuration saving $$$$ indesign, specification, config., setup, and maint.


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Why IEC61850?

Higher performance multi-cast messaging

for inter-relay communications enablesfunctions not possible with hard wires andsave $$$$ in wiring and maintenance.

Multi-cast messaging enables sharing oftransducer (CT/PT) signals saving $$$$ by

reducing transducers and calibration costs.


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Justification

Requires looking at costs beyond just the

purchase price:

You wont justify IEC61850 by examining

only the price of devices

- OR -

The benefit of IEC61850 is not in the price ofthe device. It comes from using the device.


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UCA 2.0 Standard

Mapping to MMS Services

Read Write Initiate InfoRept. Get Set... Events

Common Application Service Model - CASM

Associate Reporting Description SBO Data Set Journals

Generic Object Models for Substation and FeederEquipment - GOMSFE

Device Model Data Objects Data Types Naming Conventions

UCA 2 Profiles

ISO Conn 7 Trim 7 3-Layer Red. TCP / IPISO Conless. 7


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IEC61850 and UCA2

IECIEC6185061850

Comprehensive

EPRI-ProjectUCA 2.0

IEC60870-5-1

01,-103,-1

04

Europeanexperie

nce

GOAL: One International Standard


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IEC61850 Substation Architecture

MU = Merging Unit

MU

PT1 Optical

CT

MU

PT2 CT2

MU

Optical

PTOptical

CT

Relay Relay Relay

MU Publishes

V/I/StatusDatasets

Relay(s)

Subscribe to

Datasets

I/O I/O I/O

Station Bus- 10/100/1000 MB Ethernet

Process Bus

.1/1/10GBEthernet

Clk1 Clk2

Remote

Access

Network

MU = Merging Unit

MU

PT1 Optical

CT

MU

PT2 CT2

MU

Optical

PTOptical

CT

IED IED IED

MU Publishes

V/I/StatusDatasets

Relay(s)

Subscribe to

Datasets

I/O I/O I/O

- 10/100/1000 MB Ethernet

.1/1/10GBEthernet

Clk1 Clk2

Remote

Access

Network


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IEC61850 StandardBasic principles Part 1

Glossary Part 2

General Requirements Part 3

System and project management Part 4

Communication requirements Part 5

Substation Automation System Configuration Part 6

Basic Communication Structure Part 7

Part 9

Sampled Measured Values

Part 8

Conformance testing Part 10

Mapping to Ethernet

Mapping to

MMS andEthernet


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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 Class Model

ObjectName

ObjectReference

Name SERVER

LOGICAL-DEVICE

LOGICAL-NODE

DATA

DataAttribute

1

1..*

1

1..*

1

1..*

1

1..*

Physical Device:

access by network address

Enables data from multiple

devices to be aggregated

into a single physical device

(data concentrator)


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Logical Nodes

A named grouping of data and associated

services that is logically related to somepower system function.

dddXCBR1

Optional Application Specific Prefix

Logical Node Name perIEC 61850-7-4 (breaker)

Logical Node Instance #


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IEC61850 Logical Nodes

Power Plant (Set aside for other standards)Nxxx

Battery (Set aside for other standards)Bxxx

Sensors, Monitoring (4). SARC (archs), SPDC (partial discharge), etc.Sxxx

Protection Related (10). RREC (auto reclosing), RDRE (disturbance)..Rxxx

Protection (28). PDIF, PIOC, PDIS, PTOV, PTOH, PTOC, etc.Pxxx

Metering & Measurement (8). MMXU (meas.), MMTR (meter.), etc.Mxxx

System Logical Nodes (2). LLN0 (common), LPHD (Physical Device)LxxxInterfacing/Archiving (4). IARC (archive), IHMI (HMI), etc.Ixxx

Generic Functions (3). GGIO (generic I/O), etc.Gxxx

Fuel Cells (Set aside for other standards)Fxxx

Hydropower (Set aside for other standards)HxxxSolar (Set aside for other standards)Oxxx

Wind (Set aside for other standards)Wxxx

Other Equipment (15). ZCAP (cap ctrl), ZMOT (motor), etc.Zxxx

Power Transformer (4). YPTR (transformer), YPSH (shunt), etc.Yxxx

Switchgear (2). XCBR (breaker), XCSW (switch)Xxxx

Instrument Transformer (2). TCTR (current), TVTR (voltage)Txxx

Supervisory Control (5). CILO (Interlocking), CSWI (switch ctrl), etc.Cxxx

Automatic Control (4). ATCC (tap changer), AVCO (volt. ctrl.), etc.Axxx

DescriptionName


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Logical Node Description - XCBR

Data Name

Common Data ClassMandatory/Optional

Description

SPS


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Single Point Status (SPS) CDC(e.g. loc)

AttributeName Type Functional

ConstraintRange ofValues

Mandatory/Optional

stVal


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Object Name Structure

Relay1/XCBR1$ST$Loc$stVal

Logical DeviceLogical Node

Functional Constraint

DataAttribute


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ACSIAbstract Communications Service Interface

Defines a set of Objects

Defines a set of Services to

manipulate and access those objects

Defines a base set of data types for

describing objects


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ACSI Objects

FilesFiles

Named VariableCONTROL class

Named VariableGSSE-CONTROL-BLOCK class

Named VariableGOOSE-CONTROL-BLOCK class

Named VariableLOG-CONTROL-BLOCK class

JournalLOG class

Named VariableREPORT-CONTROL-BLOCK class

Named VariableSETTING-GROUP-CONTROL-BLOCK class

Named Variable ListDATA-SET class

Named VariableDATA class

Named VariableLOGICAL NODE class

DomainLOGICAL DEVICE class

Virtual Manufacturing Device (VMD)SERVER class

MMS ObjectACSI Object Class


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ACSI ServicesACSI Services MMS Services

LogicalDeviceDirectory GetNameList

GetAllDataValues Read

GetDataValues Read

SetDataValues WriteGetDataDirectory GetNameList

GetDataDefinition GetVariableAccessAttributes

GetDataSetValues Read

SetDataSetValues Write

CreateDataSet CreateNamedVariableList

DeleteDataSet DeleteNamedVariableList

GetDataSetDirectory GetNameLis tReport (Buffered and Unbuffered) InformationReport

GetBRCBValues/GetURCBValues Read

SetBRCBValues/SetURCBValues Write

GetLCBValues Read

SetLCBValues Write

QueryLogByTime ReadJournal

QueryLogAfter ReadJournalGetLogStatusValues GetJournalStatus

Select Read/Write

SelectWithValue Read/Write

Cancel Write

Operate Write

Command-Termination Write

Enable

Self

Describing

Devices


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Reporting

Unbuffered Reporting is equivalent toUCA2 reports

Buffered reporting enables the server to

retain data if associations are lost enabling

the client to retrieve ALL data.


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Report-Log Model


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InformationReport

GSSE

Generic Substation Status Event

OSI Connectionless

Non-Routable Profile

Ethernet Multicast Address0 1 2 3 4 5

6-byte Destination MAC Address

0 1 2 3 4 5 6 7

= 1 - Multicast


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Ethernet

MulticastAddress

GOOSE

Generic Object Oriented Substation Event

0 1 2 3 4 5

6-byte Destination MAC Address

0 1 2 3 4 5 6 7

= 1 - Multicast


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GSE Management

GetGoReference: Get a list of data set elements.

GetGOOSEElementNumber: Get the relative position

of a data set element in the message.

Get/SetGoCBValues: Read/write the GSE control block.

GetGsReference: Get the data labels for GSSE data.

GetGSSEDataOffset: Get the relative position of GSSE

data in the message. Get/SetGsCBValues: Read/write the GSE control block.


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SCL Substation Configuration LanguageIEC61850-6-1

Description language for communication inelectrical substations related to the IEDs

XML based language that allows a formaldescription of

Substation automation system and the switchyardand the relation between 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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Example of SCL


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Sampled Measured Values

A method for transmitting sampledmeasurements from transducers such as

CTs, VTs, and digital I/O.

Enables sharing of I/O signals among IEDs

Supports 2 transmission methods: Multicast service (MSVC) over Ethernet

Unicast (point-to-point) service (USVC) over serial

links.


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SMV Application


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SMV Object


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IEC61850 Controls

4 Control Models: Direct Control with normal security

SBO Control with normal security

Direct Control with enhanced security SBO Control with enhanced security

Enhanced Security provides validation and

supervision of the control action andreporting of status.


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IEC61850 Profiles


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Relationship to UCA2

CASM

GOMSFE

IEC 61850-7-2

(Services and base

data types)

IEC 61850-8-1

(Mapping to MMS)

IEC 61850-7-3(Common Data Classes)

IEC 61850-7-4

(Logical Nodes)

Brick

s


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Terminology

UCA2.0 GOMSFE

CASM

Brick GOOSE

IEC61850 CDC

ACSI

Logical Node

Generic Substation

Status Event (GSSE)


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UCA2 IEC61850 Migration

UCA2.0 is mostly a subset of IEC61850. Some additional services and objects.

Some object changes. IEC61850 uses SNTP for networked time

synch.

An IEC61850 client can be compatible withboth UCA2 and IEC61850.


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UCA2 vs. 61850 Object Models Data Object Model

Data Set Model

Association Model

Server Model

Unbuffered Reporting

Model Security Model

Time Model

Direct and SBO Control

GSSE (called GOOSE in UCA2)

Data Object Model

Data Set Model

Association

Server

Unbuffered and

Buffered Reporting No explicit Security

Time

Direct, SBO, enhancedControl

GOOSE, GSSE, andGSE Management


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Un-buffered Report Control Block

UCA 61850

Variable Length vs. Fixed Length

Variable Length allows for expansion, yet

is backward compatible.


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Client Report Subscriptions

UCA2 Clients see only those report controlblocks available to them.

IEC61850 Clients may see:

Only those report control blocks available to them;or

All available RCBs and use the resv bit to reserve a

specific RCB for their use. Determined by the server


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61850 Buffered ReportingUn-buffered Buffered

EntryID is used by Client to resynch to an

offset in a buffer containing changes.


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UCA v.s. IEC61850 MMXU


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UCA2 IEC61850 MigrationImpact on Clients

Clients may see a different object structureand may need to select IEC61850 objects.

Client report subscriptions may be

impacted depending on IED supplier.

Clients not using new services or object are

not affected by these changes. Several IED vendors plan to support both.


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Questions - Discussion

WHAT?

WHY? HOW?


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Thank You

Ralph Mackiewicz

SISCO, Inc.

6605 19 Mile Road

Sterling Heights, MI 48314-1408 USA

Tel: +586-254-0020 x103

Fax: +586-254-0053

E-Mail: [email protected]

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