CIM Standard for Substation Automation System

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CIM Standard for Substation Automation System

We do IT in power

Praga, Monday, May 09, 2011

Prof. Veronika Brundula (Universidad Simón Bolívar)Janko Blatnik (GDB d.o.o.)

Universidad Simón Bolívar

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What role are having Substations inside the Smart Grid?

To achieve the Smart Grid vision of near–real time information, a transformation of the power grid communication infrastructure is needed, particularly in transmission and distribution substations.

The existing supervisory control and data acquisition (SCADA) remote terminal unit (RTU) systems located inside the substation cannot scale and evolve to support next generation intelligence.

New substation automation SCADA system is based on flexible IEC 61850 standards for communication and integration of new smart IED and IEC 61970/61968 for the integration into the control center.


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What role are having Substations inside the Smart Grid?

The migration towards this future smart substation is taking place because of:

the need to reduce the operational coststo bring more intelligence and automation into the future power gridto comply with new regulatory requirements like NERC-CIP (North American Electric Reliability Corporation - Critical Infrastructure Protection) or UCTE - Operation Handbook


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What are CIM and IEC 61850?

CIM … Common Information Model is the set of IEC 61970 and IEC 61968 standards for control center data.It enables interoperability and operation of the interconnected power systems

IEC 61850 … standard for substation data.It enables interoperability at substation level. Both standards use XML for data presentation.Both standards are under the jurisdiction of IEC TC57 working groups (http://cimug.ucaiug.org ). That gives them the same logic and makes then “compatible”.


http://cimug.ucaiug.org/

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How to design and build a new smart substation or renew an existing one to make it “Smart Grid ready”?

IP communicationsOpen standards like CIM and IEC 61850Interoperability between different vendorsFull redundancyComponents are having integrated communication devicesGOOSE messagingIEC 61850 station busIEC 61850 process busAnd with CIM we get Unified data model


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How to design and build a new smart substation or renew an existing one to make it “Smart Grid ready”?


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SAS architectureUniversidad Simón Bolívar

CIB (CIM Integration Bus)

HSDAGDA

RDBMS

CIM XMLPower system model

importer/exporter

WEB EditorPower system model

Browser/Editor

WEB Reporting Services & WEB SCADA

Syncronizer

WEB Work Flow (WWF)

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Technologies to use for SASUniversidad Simón Bolívar

CIM integration Bus (CIB), is message bus based on OpenESB or WCF (Windows Communication Foundation). GID (Generic Interface Definition) are public APIs for CIB.

GDA-Generic Data Access (IEC 61970-403)HSDA-High Speed Data Access (IEC 61970-404).

CIB also supports N+1 redundancy of the system

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IEC 61970-403 Generic Data Access (GDA) defines services that are needed to access public entity objects for the power system domain that are defined in the IEC 61970-3xx series: Common Information Model (CIM).

GDA permits a client to access data maintained by another component (either an application or database) or system without any knowledge of the logical schema used for internal storage of the data

Generic Data Acces – GDA (IEC 61970-403)Universidad Simón Bolívar

CIB

GDA

WEB Visual Editor

XML Parser

GDA Client

CIM XML File

XML Parser

GDA Client

SCADA Broker

XML Parser

GDA Client

AMI Broker

XML Parser

GDA Client

Data flow (GDA)

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IEC 61970-404 specifies an interface for the efficient transfer of data in a distributed environment. Small amounts of data are transferred with short delay but also large amounts of data are transferred in short time but with possibly longer delay. This is a typical requirement for a SCADA system that acts as a real time data provider to other sub-systems.

Other systems than SCADA may also benefit from the characteristics of HSDA. When short delay times as well as bulk data transfer is required, HSDA is a good fit.

High Speed Data Acces – HSDA (IEC 61970-404)Universidad Simón Bolívar

Data flow (HSDA)

OpenESB

HSDA

Visual Editor

XML Parser

HSDA Client

SCADA Broker

XML Parser

HSDA Client

AMI Broker

XML Parser

HSDA Client

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Benifits of suppoted technologies

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SOA architectureOpen standardsIntegrated support for HTTP and web servicesImata vgrajena komponente, ki omogočajo avtomatično transformacijo in povezovanje.OpenESB supports BPEL WCF has integrated the WWF

Performances

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Measurement Resutls

Performance <2s for average request

Data flow Up to 500 requests per one 4 CPUserver

Redundancy

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WCF supports N+1 redundancy

Redundancy

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Security

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Encripted and compresed messagesAvtentification based on username/passowrd or X.509 certificate

Interoperability

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WCF is based on web services, defined in WS-*. WS-* standards have been developed by different vendors like Microsoft, IBM, SUN... And today they are under the OASIS jurisdiction.

Interoperability

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Interoperability

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Metadata: The Web Services Description Language (WSDL) defines a standard language for specifying services and various aspects of how those services can be used. WS-Policy allows specification of more dynamic aspects of a service's behaviour that cannot be expressed in WSDL, such as a preferred security option. WS-MetadataExchange allows a client to request descriptive information about a service, such as its WSDL and its policies, via SOAP. Beginning with the .NET Framework 4 release, WCF also supports WSDiscovery. This broadcast-based protocol lets an application find services available elsewhere on its local network.Reliability: WS-ReliableMessaging defines additions to the SOAP header that allow reliable end-to-end communication, even when one or more SOAP intermediaries must be traversed.

Interoperability

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Transactions: Built on WS-Coordination, WS-AtomicTransaction allows using two-phase commit transactions with SOAP-based exchanges.

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Integration mechanism and data flow of IEC 61850 and CIM


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To be able to use CIM and IEC 61850 together we need to design mapping rules between CIM and IEC 61850.

As we can see IEC 61850 and CIM representation the mapping is not too complicated:The breaker elements are the same in both standardsLogical node associated with breaker is analogous to the CIM Discrete Value objectThe terminals associated with breaker are the same in both standardsThe “Connectivity Node, Terminal of Busbar and the Busbar” elements of the CIM standard are mapped to the “Connectivity node” of the IEC61850 standard.

When we established the mapping rule we have a very good base for the integral solution.

Integration mechanism and data flow of IEC 61850 and CIM


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Integration of IEC 61850 and CIMUniversidad Simón Bolívar

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As we can see, the integration of both standards gives us integral solution of Substation Automation System and Control Center. Each parameter can be entered into the system exactly once. The CID configuration files from IEDs are imported into the SAS. That import procedure builds up the SAS model.SAS model is exported as CIM-XML file and imported into the CIM compliant control center. That import builds up the power network model in control center. That can be also achieved automatically (on event) if the SAS and control center supports GDA API interface defined in IEC 61970-403.Real-time data between IEDs and SAS uses the IEC 61850 standard. For the communication between control center and SAS many standards can be used.Most commonly used standards are DNP 3.0 and IEC 60870-5-104. In the future we can expect that either IEC 61850 or HSDA defined in IEC 61970-404 will be used on that level.

Integration of IEC 61850 and CIMUniversidad Simón Bolívar

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Plug & Play SubstationUniversidad Simón Bolívar

Integration of IEC 61850 and CIM (IEC 61970/61968) gives us “Plug & Play” substation automation system

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Distributed control centerUniversidad Simón Bolívar

That solution gives us so called “Distributed control center” solution. Every substation automation controller is part of the cluster connected

with CIM based middleware

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Benefits of Smart Substation

New smart substations have fully redundant design. All components are having integrated communication devices. Instead of old fashion hard wire solution between secondary and primary equipment, a new IEC 61850 IP based process bus is taking its place. Instead of serial point to point communication IEC 61850 IP based station bus is taking its place. Instead of hard wire for inter IED communication (interlocking …), IEC 61850 GOOSE messaging is used. The configuration of IEDs is standardized with IEC 61850 and can be imported into the station controller as CID file for each IED.Most of the hard wires in substations are replaced with IP communication. Adding new smart primary equipment is simply adding a new IP device into the IP network, same as with secondary equipment.The complete model of a substation can be transferred into the control center as CIM-XML file or through GDA-Generic Data Access API using the CIM standards IEC 61970/61968. GDA even supports that every change in the configuration of station controller is automatically transferred to the control center.


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CIM ClientUniversidad Simón Bolívar

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WEB ScadaUniversidad Simón Bolívar

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CIM based enterprise solutionUniversidad Simón Bolívar

CIM Integration Platform

PROCESS LAN

WEB.SAS

IEC 61850, 101, 103

IEC 101, 104DNP 3.0

GDA, CIM-XML, HSDA

SAS

IEC 61850, 101, 103

IEC 101, 104DNP 3.0

WEB.SAS

IEC 61850, 101, 103

CIM Integration Bus

DC

S-FSK PLC

WEB Services(Proprietary)

WEB.DC

S-FSK PLC G3-PLC, ZigBee

IP Meter

HSDA, GDA

DLMS DLMS

SCADA/DMS

GDB.DAQ

WEB.SCADA WEB.AMI AMR Klicni Center

Open Meter API,Google Meter API

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CIM and IEC 61850 offer us an open cost effective solution. Both standards has been worldwide accepted by different utilities and manufactures. Both standards, each for its level, offers interoperability, free configuration, cost effectiveness, scalability and reliability.

The integration of both levels, substation and control center is indispensable. Both standards are becoming the facts as the utilities are migrating to the open and network solution for their SAS and control centers.

ConclusionUniversidad Simón Bolívar

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THANKS


Universidad Simón BolívarSartenejas, Baruta,

Edo. MirandaApartado 89000

Caracas Venezuela

Tel: +58 412 9800 [email protected]

GDB d.o.o.Tehnološki park 24

1000 LjubljanaSlovenia-EU

Tel: +386 59 0322 45Fax: +386 59 0322 46E-mail: [email protected]

www.gdb.si

mailto:[email protected]

mailto:[email protected]

http://www.gdb.si/

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CIM Standard for Substation Automation System