iec618650 presentation iec 61850 û data model and services

7/31/2019 IEC618650 Presentation IEC 61850 Data Model and Services

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Copyright2004UCA.

Allrightsreserved.-1-

9/2/2004

IEC 61850 Data

Model and Services

Christoph Brunner

International Advisor

Copyright2004UCA

-2-

Data

TCP/IP Network

Application data and communication

Information

Models

Logical Nodes and Data(IEC 61850-7-4 / -7-3)

Information

Exchange

Service Interface (Abstract)(IEC 61850-7-2)

Communication

Protocols

Mapping to e.g. MMS andTCP/IP/Ethernet(IEC 61850-8-1 / -9-2)


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Features of IEC 61850

Interoperability between devices

and application functions throughstandardized data models and

information exchange

Free configuration of

communication network and

allocation of functions to devices

Long term stability through

decoupling of application and

communication

Copyright2004UCA

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Data model and information exchange

IED

IntelligentElectronic

Device

Has a DATA

MODEL that can

be accessed

The WHAT

to exchange(IEC 61850-

7-4 and

61850-7-3)

RequestRequest

ResponseResponse

EventEvent

The HOW to exchange

(IEC 61850-7-2)

Features of

IEC 61850

Interop

erabili

ty


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Station Workplace

Protection and Control

Circuit Breaker Combi Sensor

XCBR

Circuit Breaker

TCTR

Current Transformer

TVTR

Voltage Transformer

CSWI

Switch ControllerPDISDistance Protection

IHMI

Human Machine IF

Logical Nodes and DevicesFeatures of

IEC 61850

Free

configu

ration

Copyright2004UCA

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Station Workplace

Protection

Control Combi Sensor

XCBR

Circuit Breaker

TCTR

Current Transformer

TVTR

Voltage Transformer

CSWI

Switch ControllerPDISDistance Protection

IHMI

Human Machine IF

Logical Nodes and DevicesFeatures of

IEC 61850

Free

configu

ration


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ApplicationObjectsServices

7

6

5

4

3

21

ISO/OSI

seven layer stack

From application to communicationFeatures of

IEC 61850

Substation Application;

long term stable

(IEC 61850-7-3 and 7-4)

State-of-art communication

technology; fast changing

Abstract interface

(IEC 61850-7-2)

Stack interface

Longte

rm

stabili

ty

MappingIEC 61850-8-1, -9-1, -9-2

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Application modeling

Logical nodes as the core

components of the object model

The hierarchical object model

Specification of logical nodes and

common data classes

From point lists to an object

oriented data model The configuration language


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Logical nodes, data and servicesApplication

modeling

Logical Node XCBR

Position (m)

Operation capability (m)Operation counter (o)

Position sensor alarm (ex)

Logical nodes are the functions that

the user needs

Each logical node has mandatory (m)

and optional (o) data

To access logical nodes and data,

standardized services are used

Logical nodes and data are self-

describing; structures are readable

with directory services

Extensions (ex) can be realised

according to defined rules; no private

ranges are needed

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Data model devices and logical nodes

Physical Device

PISA_Q0_L3

Logical Device Q0_L3/

Logical Node XCBR

Logical Device B_L3/

Logical Node B0_SIMG

Logical Node B1_SIMG

A logical node is a

container for

function related data

Application

modeling


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Primary technology Secondary

technology

PTOC

Logical nodes in the real world

XSWI

XSWI

SIMG

XCBRSIMG

PDISCSWI

CILO

RREC

Application

modeling

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Mapping

TCP/IP

NetworkMMS

61850-6

configuration file

From the real world to the modelApplication

modeling

Real

devices in a

substation

SCSM, e.g.61850-8-1

...

Virtual World

LNLNLNLN

Position

Mode

XCBR1

Logical device (Bay)

virtualization

61850-7-4 logical node

(circuit breaker)

61850-7-4 data

(position)

61850-7-2

services


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Logical node and logical node instances

Q0

Q52

Q51

Q8

Q9

Q1

T1

Q52_XSWI

Q51_XSWI

Q9_XSWI

Q8_XSWI

LN XSWI (Switch)

The names of logical nodes

(e.g. XSWI) are standardizedin IEC 61850-7-4 and have

always four characters

Q1_XSWI

Instance of a LN

Application

modeling

The name of an instance of a

logical node may have a prefix

and a suffix

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The hierarchical data model

Protectiondistance

Protectiontime

overcurrent

Strgeneral

dirGeneral

phsA

dirPhsA

PDIS

status

Str

general

dirGeneral

phsA

dirPhsA

PTOC

status

PTRC

status

settings

Tr

general

phsA

TrgMod

spVal

BayUnitIED BayUnit

Protectiontrip

conditioning

PTRCPTRC

PTOCPTOC PDISPDIS

Informationmodel

Logical Node

Data

Data Attribute

Application

modeling


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Vector

The data attributeApplication

modeling

Common data

attribute type

Composite

component

Primitive

component

Basic type

mag: AnalogueValue+

ang: AnalogueValue+-

i: INT32

f: FLOAT32

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The datasetApplication

modeling

dataset Switch-positions

Q1_XSWI

pos

Q8_XSWI

pos

Q9_XSWI

pos

Q51_XSWI

pos

Q52_XSWI

pos

Q1_XSWI.pos

Q8_XSWI.pos

Q9_XSWI.pos

Q51_XSWI.posQ52_XSWI.pos


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Specification of logical nodes

From IEC 61850-7-4

Application

modeling

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Specification of common data classes

From IEC 61850-7-3

Application

modeling


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Information exchange

Client / Server and peer-to-peer

communication Reporting

GOOSE

Transmission of sampled values

Communication protocols

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Physical Device

ACSI Server

Data

Data

Physical Device

ACSI Client

Application

Data

Physical Device

ACSI Server

Data

Data

Application

Data

Physical Device

Application

reports

req / rsp

req / rsp

Client / Server communication

Communication conceptsInformation

exchange

Application of client server

communication

typical SCADA application

like control of switchgear or

transmission of events

(Reporting)

Store and retrieve sequence

of events (log)

Transfer offiles (i.e.

Comtrade files)


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Physical Device

ACSI Server

Data

Data

Physical Device

ACSI Client

Application

Data

Physical Device

ACSI Server

Data

Data

Application

Data

Physical Device

Application

GOOSE Message

Sampled Values

multicast

Peer to peer communication;

time critical

Applications of "peer-to-peer"

communication

tripping of circuit breakers:

short information that needs

to be transmitted with a low

probability of loss within a

few milliseconds

transmission of sampled

values from instrumental

transformers: high amount

of data, to be transmittedwithin a few milliseconds,

loss of data needs to be

detected

Communication conceptsInformation

exchange

Publisher

Subscriber

Copyright2004UCA

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Information flowInformation

exchange

Get, GetDef, ...

Server

Data

Client

Set, Operate, ..

confirmation

Server

Data

Client

Report Server

Data

Client

multicast Publisher

Data

Subscriber

Subscriber


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Control model (61850-7-2)

Reporting (61850-7-2)

Control model (61850-7-2)

ControlInformation

exchange

Client Server (Control Object) Operated Device

Select (open)Select rsp+ Select

Operate (open)

Operate rsp+ Activate outputActivation of device

mechanism

between

open

Deactivate output

Report (open)

CmdTerm

Acquisition of status

from device

Copyright2004UCA

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Report, BufTm = 0

Report, BufTm > 0

Reporting

Two kind of reports

Unbuffered reports events

may be lost due to

communication interruption or

overflow

Buffered reports used for

sequence of events

Events

Data change Integrity period expired

(cyclic report)

General interrogation (on

request)

Information

exchange

Client Server

Configure report control event

Report

event

event

Report

BufTm

event


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Reporting configuring the content

Report ControlDatSet

TrgOp

RptID

ValueDatSetRefRptID Reason

Information

exchange


Q1_XSWI.posQ8_XSWI.pos

Q9_XSWI.pos

Q51_XSWI.pos

Q52_XSWI.pos

Q1_XSWI

Q8_XSWI

Q9_XSWI

Q51_XSWI

Q52_XSWI

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GOOSE Generic object oriented eventInformation

exchange

On On On On Off| n

Publisher

On Off On On Off| n-1


On Off On On Off

On Off On On Off| n-1

Off

Subscriber

On

On On On On Off

On On On On Off| n

On


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Transmission of sampled valuesInformation

exchange

n-3 n-3

n-3

n-2

n-2

n-2

n-1

n-1

n-1

n-4

n-4

n-4

PublisherSubscriber

n

n

n

Copyright2004UCA

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Abstract communication

service interface (ACSI)

Communication protocols

Use of state of the art communication protocols like

TCP/IP and Ethernet with priority tagging

Immediate benefit from progress in communication

technology (e.g. higher bandwidth and scalable configuration)

Ethernet

Communication

stack with

TCP/IP

Client-serverHigh speed

Application

Information

exchange

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