Substation Automation Systems - Day 3 -2 IEC61850 Interoperability and Testing

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ABB GroupJuly 26, 2012 | Slide 1

CHP050 - Substation Automation SystemsIEC61850 Interoperability and Testing

Luis-Fabiano Santos, Substation Automation Systems


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Content

Understanding Interoperability

Conformance Testing

ABBs System Verification Center

Understanding SCL files

Understanding data sets and control blocks Conclusion


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Integration of devices from different vendors Bay level

Network communication

Station level

Station

Vendor

A

Vendor

B

Vendor

B

Vendor

A

Vendor

A

Vendor

C

Vendor

C

Vendor

C

Vendor

DGW

Network

Interoperability


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IEC 61850

CompanyB Profile

CompanyA Profile

CompanyC Profile

Interoperable yes, but............. A communication profile defines the mandatory SUBSETof a standard with

selected options that is implemented

Different Profiles may conform to the standard but still not be 100% interoperablewith other systems

Interoperable

Profile

Interoperable 100% Interoperability

Interoperability


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Interoperability Interchangeability

Samples for vendor specific implementations Naming of LogicalDevice

Prefix of LogicalNode

Implementation degree of mandatory/optional/vendor specific data

Usage of GGIO

Replacement of relays from different vendors is only possible with

additional engineering (SW & HW) and might even end in differing

functionality

Station

IED 1 IED 2 IED 3 IED 4 IED 5

SCS GW

Network

IED x


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Enable Interoperability by Conformance Testing

IED Conformace testing is formalized in the standardIEC61850 Part 10. It defines:

the methods and abstract test casesfor conformancetesting of devices used in substation automation systems

the metr ics to be m easuredwithin devices according tothe requirements defined in IEC 61850-5.

Structure of IEC 61850 :


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Product

Development

Market

HomologationSystem Integration & Handover

Quality Assurance according IEC61850-4


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Conformance Testing; What?

Conformance testing considers what is standardized for IEDsonly

Documentation & version control; IEC 61850 part 4

Protocol Implementation Conformance Statement (PICS)

Model Implementation Conformance Statement (MICS)

Protocol Implementation eXtra Information for Testing

(PIXIT)

Device performance; IEC 61850 part 5

IED & Substation Configuration Description (ICD & SCD);

IEC 61850 part 6

Data model; IEC 61850 part 7-3 and 7-4

Communication services; IEC 61850 part 7-2, 8-1, 9-1

and/or 9-2


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PICS, MICS, PIXITICD, SCD files

IED specific

Test Plan

Test

Test Report

Defects?Certificate

No Yes

Correct

defects

IEC 61850Documents

IEC 61850-10

Test Procedures

Quality

Program

IEC TC57WG10-12

Problems

& Status

FixesFixes

Conformance Testing: Process according IEC61850-10


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Ethernet 100BaseFX Switch & SNTP Time Master

simulator & Test Master

Prot & Cont

IED

61850 Analyzer

Process simulation test set

Config

IED centric testing

Conformance Testing; How?


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SVC is a recognized IEC 61850conformance test center

May 2006 - The SVC(in Baden/Switzerland)

is qualified by the UCA International Users

Group to be an IEC 61850 Competence

Center.

It is the very first manufacturers test lab

in the world to be qualified.

The SVC is thereby officially entitled to

certify the IEC 61850 conformity of products

and attach the Users Group Label to them.

SVC - System Verification Center


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Conformance testing vs. System Integration

What is not standardized ? LD and higher plant identification designations

Functions and Allocation of functions to IEDs

Applications

Redundancy

Tools and engineering process

SA concepts and architectures

Under preparation for next versions of the standard:

Conformance test procedures for clients

SCL Implementation Conformance Statement (SICS) for tools

Devices can be conform to the standard and sti l l not b einteroperable in a system

Need for a System Speci f icat ion

Need for a Syst em Integrator


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ABB as System Integrator

What do you get when you buy a system Made in ABB ? conformance tested IEDs according the standard

Full fletched system documentation according

IEC61850 in a SCD file including a reproducible single

line diagram and the complete data flow

Your system has been type tested in ABBs SVC


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ABB's Strategy for introduction of new technology

IEC 61850 a New Driver in the SA B us iness IEC 61850 is a new driver for major changes in the entire SA

portfolio

Additional requirements have evolved for products to be integrated

into systems

Technologies like IEC61850 affect many aspects of systems

components and system integration New or updated control and protection products

Adapted product and system engineering tools and processes

New communication infrastructure and topologies

Integral System Veri f icat ion is key


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SVC - System Verification CenterThe Mission

Be theABB competence centerfor system-related IEC 61850 issues

Ensure a common understanding on the system integrationand

on the engineering processof IEC61850 systems

Identify and initiate closing of gapsbetween system requirements

and product features

Improve the qualityof the system solution in terms of architecture,integration and performance

Decrease demand for specialized expertisewithin a individual

system project

Build up integral know howin testing and system integration

of 3rdparty products


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Quality Assurance according IEC61850-4 :SVC Positioning

Product

Development

Market

HomologationSystem Integration & Handover

Product

Conformance

& System Type

Testing


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Stand-alone produc t tests

-performance tests for local

functions like:

-trip times

Single Product Veri f ication in a

Small , stable system

- Baseline set of tests performed to

assure the product integration into

a system does not impact

system performance.

- Conformance test against 61850

System Integration Test in a reasonableLarge System

System integration tests:

- Long-term stability tests

- Engineering integration tests

-Engineering guideline tests

Performance tests with respect to:

-network load

-number of active devices

-presence of disturbances

-protection and control applications

-startup time

-number of signals

-time synchronisation

Functional tests:

-control services (Addcause/check)

-control authority handling-DR upload

-parametrisation / settings

Conformance Type Tests Product System Test System Verification & Validation

ABBs Release Process of Products : SVC Positioning


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Daettwil/Switzerland research centre

Intranet

//Q1T1Host/Driverdir/

SCLSubstation Configuration Language


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IEC61850 Part 6 defines interoperable file format for data exchange betweensubstation automation engineering tools such as

IED Configuration Tool

System Configuration Tool

Substation Configuration description Language, is a formal, standardized and

extendable description of the communication between logical nodes in a

substation

All communication related configurations are supported by one neutral and

formal description. The description can serve as support for engineering and

automatic testing.

Common approach of system engineering without the need of time

consuming, error prone human conversion of engineering data.

SCLSubstation Configuration Language


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SCL based on XMLas definedby the standard IEC 61850

Hierarchical Data Treedefined and implemented in tools

For Substation Engineers For machines like Engineering Tools

SCL file Contents illustrated


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=E1 Voltage level 110kV

=WB1 Busbar 1

=WB2

=Q2 line bay / feeder

=QB1 =QB2

=QE1=QC1

=QA1

IED-SB1

=S1CSWI1

Relation between LN

and single line

=Q1 line bay / feeder

=QB1 =QB2

=QE1=QC1

=QA1

Topology

IED-SB1

=S1CSWI1

IED Configuration/

Data Model

=XW1

Communication

Subnetwork

Data flow between LNs

On different IEDs

*This graphic does not differentiate between mandatory/option contents.

SCL Contents illustrated*


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* defined in IEC61850 Standard Part 6

QA1 QB1L1

Example :

station ABBA with bay E1Q1, containing CB QA1and disconnector QB1,both electrically connected in L1. A Controller element called CSWIcontrols both switches.


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=Q1 Feeder =Q2 Feeder

=E1Voltagelevel110kV

=QB1 =QB2

=QC1

=QE1

=QA1

=QB1 =QB2

=QC1

=QE1

=QA1 Primary

equipment

IEDs on bay

level

IEDs on station

level

Network

SCL-files

.SSD

.ICD

.ICD

.SCD

Functionality in

Logical nodes

CSWI1 CSWI2 CSWI3

XSWI1 XCBR1 XSWI2

CSWI1 CSWI2 CSWI3

XSWI1 XCBR1 XSWI3

SA System

SCL/SCD Contents illustrated

SCL/SCD C t t ill t t d


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IED capability description (.ICD)

Maximum data model / functionality of IED

Service capabilities and engineering limits of IED

IED version information

Substation automation system specification (.SSD; not used in ABB)

Switch yard single line

Function allocation to switch yard parts

Substation automation system description (.SCD)

IED communication connections and addresses

Data flow between IEDs, source version identification

Switch yard single line

IED Function allocation to switch yard

Configured IED description (.CID, optional, IED specific) Part of SCD file necessary to configure an IED instance

Configuration values accessible via IEC61850

SCL/SCD Contents illustrated

T i l SCL fil h i th i i


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.ICD/.CID,device funct iona l i ty

Configuration

data

.SCD, systemfunct iona l i ty

Import and Export of SCL data between system configuration

tools and device configuration tools

Device (IED)

configuration

tool

HMI, PCM600

MiCROSCADA Pro

... ...

Interbay bus

Substat ion Au tomat ion System

Typical SCL file exchange in the engineering process

SCL Ad t


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Single data entry Common approach of system engineering &

documentation in one file (SCD) without the need of time

consuming, error prone human conversion of engineering

data.

Save investments made in proven application data and

migrate the application to new hardware generation ofsame or different device manufacture

Minimize maintenance cost in the life cycle of their

secondary equipment

SCL Advantages wrap-up

Data Consistency in a System (1/2)


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Inter Bay Bus

Process Bus

Station

Computer

IED IED IED IED

Process Interface Process Interface

Browse IEC61850

Model of multiple IEDs

Testing Tool

SA Testing & CommissioningEngineer

1

.SCD

Load SCD file for reference2

Check consistency by

comparing IEC61850

models

3

Data consistency checks can be done by comparison

of offline data (SCD file) with online data on IEDs :

Reporting versioninformation can be read

on demand

Data model versionand IED HW / SW

version can be read on demand




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Inter Bay Bus

Process Bus

Station

Computer

IED IED IED IED

Process Interface Process Interface

Log/analyze

ethernet traffic

Testing Tool

SA Testing & CommissioningEngineer

1

.SCD

Load SCD file for reference2

Check consistency by

comparing dataset

revisions

3

Real time servicesalways have revisionof data

sets in the sent message. The receiver checksthis always to assure configuration compatibility.


SCL/SCD Contents file quality


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The impact of poor SCL file quality on System Integration

Project experiences have shown that in multi vendors systems, a

good SCL file quality delivered by all suppliers is essential for

efficient system integration

Non compliant SCL files can be a show stopper for the integration of

IEDs

System Integrators must therefore be able to very fast identify poorquality SCL files to not loose time and money during project

execution

As ABB has both roles supplier and system integrator, ABB has

developed a expert SCL file validation tool which is used in

R&D to ensure high quality SCL files coming out of ABB engineeringtools

SVC for fast analysis of own and sub-supplier SCL files

SCL/SCD Contentsfile quality

SCL/SCD Contents file quality


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ABBs SCL file Validator checks

SCL files for conformity with theIEC 61850 Standardand reportany errors found during thevalidation process.

1. 61850 part 6 schema (2003,2006 and known extensions)

2. Object constructionvalidation. The names arechecked to ensure that they

follow the allowed namingconventions in the standard,or that there are no twoobjects with the same namein a same context.

3. Semantic validation of thestructures (checking that acollection or a dictionary isnot empty, referencechecking, etc.).

4. Semantic validationaccording to the data modeldefined in Parts 7-3 and 7-4.For instance, an XCBR ischecked to have a PosDATA.

SCL/SCD Contentsfile quality

IEC 61850 Datasets & Control Blocks


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IEC 61850Datasets & Control Blocks

The data flow between clients and

server is defined by datasets andcontrol blocks.

A dataset is the container that includessignals that have to be transferred

A control block is the vehicle thatdefines how and when a dataset istransferred

Both clients and servers must have thedescription of the datasets (map)

Al l this informat ion is documentedand exchanged b etween theconf igu rat ion tools by using the SCDfi le

Horizontal Communicationusing GSE Control Blocks

- GOOSE CB GOOSE = Generic Object Oriented Substation Event

Vertical Communicationusing Report & Setting Control Blocks- Report = Buffered / Unbuffered / LOG CB

- Settings = Setting Group CB

Data Set and Control Block (CB) Overview


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Data Set and Control Block (CB) Overview

DO

LN

LD

logical

device

DO

LN

LD

logical

device

IED

Data

Set

DO

LN

Log, Report, GSE, Samplesdefined by data sets and control blocks (CB)

Log

CBtriggers

Buffered vs Unbuffered Reporting (1/2)


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IED (server)

ethernet

Client

Additional changes of data in the same data set are

collected during buffer time (BufTim) and sent out as onereport at the end of BufTim. Typical Setting 50-100ms.

The data set specifies

which data is to be

monitored and reported.

Buffered vs. Unbuffered Reporting (1/2)

Buffered vs Unbuffered Reporting (2/2)


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Buffered Reporting Unbuffered Reporting

Used for Time Critical informationexchange

Yes Yes

Can lose events No. Possible to retrieve historical events

happening during a communication error when

reconnected

Yes. Not possible to retrieve historical events

happening during a communication error when

reconnected

Amount of ethernet traffic Changed data is buffered for predefined time - if

other data in the same dataset is changed, only

one combined report will be sent out

Changed data is sent out immediately

In Systems d el ivered by ABB

Buffered Report ing is used

for miss ion cri t ical data &

Unbuffered Report ing for

measurements o nly

Buffered vs. Unbuffered Reporting (2/2)

Static vs Dynamic Datasets


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Static Datasets Dynamic Datasets

Engineering Offline configuration by generic system

engineering tool

Online configuration by client specifc

configuration tool

Documentation in SCL file according

IEC61850-6

Full documentation of dataflow in SCD file Partial documentation of dataflow in SCD file

System Performance Faster startup time because no datasets must be

initialised at startup or reconnection after loss of

communication

Datasets must be created at startup and af ter

communication break

Testing, Commissioning &

Maintenance

Ethernet traffic can be decoded based on SCD

file or uploaded data from an IED that has been

browsed

Enables Systemconsistency checks by comparing

online data from IED with offline data in SCD file

(e.g. model, versioning)

Dynamic datasets not visible for clients that have

not created them. Ethernet traffic cant be

decoded because the content of a report is not

known

Systemconsistency must be handled by client

In Systems d el ivered by ABB

Static Datasets are used

Static vs. Dynamic Datasets

ABB maximizes the benefits


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ABB combines its vast experience in substation automation,

expertise in IEC 61850 and excellent system integrationcapabilities to offer customers:

Optimized solutions with scalable systemarchitectures for alltypes of substation projects, customer philosophies and availability

requirements

Enhanced operational safety & maintenance efficiency

Improved management of user-understandable data

Full exploitation of components functional capabilities

Maximum system performance with functionality andinteroperability proven by in-house System Verification

Center

Guaranteed system openness for future hardwareand functional extensions

Optimal life cycle management and low life cycle cost

IEC 61850 is the international standard for

Communication systems and networks in

substations

ABBs strong and continuouscommitment to IEC 61850 ensures

customers of getting future-proof

solutions

ABBs continued strong commitment to

IEC 61850 assures customers of future-

proof concepts with unrivalled flexibility,

modularity and performance

of IEC 61850 for customers around the globe


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