CIM Standard for Substation

possehastyMechanics

Nov 5, 2013 (3 years and 9 months ago)

223 views

1

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

2

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.


Universidad Simón Bolívar

3

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 costs


to bring more intelligence and automation into the future
power grid


to comply with new regulatory requirements like NERC
-
CIP
(North American Electric Reliability Corporation
-

Critical
Infrastructure Protection) or UCTE
-

Operation Handbook

Universidad Simón Bolívar

4

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”.

Universidad Simón Bolívar

5

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


IP communications


Open standards like CIM and IEC 61850


Interoperability between different vendors


Full redundancy


Components are having integrated communication

devices


GOOSE

messaging


IEC 61850 station bus


IEC

61850 process bus


And with CIM we get Unified

data model


Universidad Simón Bolívar

6

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 architecture

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CIB (CIM Integration Bus)

HSDA

GDA

RDBMS

CIM XML

Power system model
importer/exporter

WEB Editor

Power system model
Browser/Editor

WEB Reporting Services
& WEB SCADA

Syncronizer

WEB Work
Flow (WWF)

8

Technologies to use for SAS

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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

9

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)

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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)

10

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11

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)

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Data flow (HSDA)

OpenESB

HSDA

Visual Editor

XML Parser

HSDA Client

SCADA Broker

XML Parser

HSDA Client

AMI Broker

XML Parser

HSDA Client

12

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Benifits of suppoted technologies

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SOA architecture


Open standards


Integrated support for HTTP and web services


Imata vgrajena komponente, ki omogočajo avtomatično
transformacijo in povezovanje.


OpenESB supports BPEL


WCF has

integrated the
WWF

Performances

14

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Measurement

Resutls

Performance

<
2
s

for

average

request

Data

flow

Up

to

500

requests

per

one

4

CPUserver

Redundancy

15

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WCF supports N+1 redundancy

Redundancy

16

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Security

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Encripted

and compresed messages


Avtentification based on username/passowrd

or
X.509
certificate

Interoperability

18

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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

20

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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.

22

Integration mechanism and data flow of IEC 61850
and CIM

Universidad Simón Bolívar

23

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 standards


Logical node associated with breaker is analogous to the CIM Discrete Value
object


The terminals associated with breaker are the same in both standards


The “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

Universidad Simón Bolívar

24

Integration of IEC 61850 and CIM

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25


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 CIM

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Plug & Play Substation

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

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Distributed control center

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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 Client

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WEB Scada

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CIM based enterprise solution

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CIM Integration Platform

PROCESS LAN

WEB.SAS

IEC 61850, 101, 103

IEC 101, 104

DNP 3.0

GDA, CIM
-
XML,
HSDA

SAS

IEC 61850, 101, 103

IEC 101, 104

DNP 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.

Conclusion

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33


THANKS




Universidad Simón Bolívar

Universidad Simón Bolíva
r

Sartenejas
,
Baruta
,

Edo. Miranda

Apartado

89000

Caracas Venezuela


Tel: +58 412 9800 358

vbrundula@usb.ve

GDB d.o.o.

Tehnološki park 24

1000 Ljubljana

Slovenia
-
EU


Tel: +386 59 0322 45

Fax: +386 59 0322 46

E
-
mail:
cim@gdb.si

www.gdb.si