Use of IEC-61850 to telecontrol MV grids

PAC World Conference

David Bru i Bru – Technical Director at iGrid T&D29th June 2011 Dublin Ireland29 June 2011, Dublin, Ireland

Presentation

• Fine control of the distribution grid• Homogenous telecontrol system• MV control high volume of • MV control high volume of

facilities• We present standard solutions

with:–Standard protocols

Future proofed–Future-proofed–Low cost–Communications Media independent

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Contents

Control overMV grid Considerations Tools Cases SolutionsMV grid Considerations Tools Cases Solutions

SAIDILow cost IP RemoteSAIDI

Communications

Robustness

networks switchgears

RenewablesRobustness

Future-proof IEC 61850Fault

detection

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MV telecontrol considerations

• Low Cost: Equipment, commissioning q p , gand communications

• Communications media • Communications media independent

• Off-the-shelf products• Future-proofFuture proof• Robustness: EMC + temperature and

h idithumidity.

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The communications media

• TCP/IP networksI i f i d bli – Integration of private and public

networks.– Media independent

• Today networks for MV telecontrolToday networks for MV telecontrol– Private networks (TETRA, xDSL, ...)

I t t i d• Investment required.• Secure communications.

P bli k (GPRS Wi )– Public networks (GPRS, Wimax, ...)• Cost effective solution.• Suited for non-critical points.

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The communications media

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Why IEC-61850?

• Protective devices available to all applicationsapplications

• More functionalities• Generic widely available technology• Share common: protocol, data format,

naming, configuration.

• Easy and secure deployment (configure y p y ( gand commissioning)

• Low trafficLow traffic• Future

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Case A - Remote Control of MV switchgearsswitchgears

• Use of MMS/61850Use of MMS/61850• Objects discovering reduces the chance

of configuration errors during of configuration errors during commissioning.

• Much other information for engineering • Much other information for engineering applications.E t b itt d i B ff d R t • Events submitted using Buffered Report Control Blocks (BRCB).

• Measurements submitted using Unbuffered Report Control Blocks (URCB).

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Case A - Measurements

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Case A – Today’s handicaps

Many facilities require retrofit• Many facilities require retrofit

• 61850 equipment more expensive than conventionalthan conventional

• Control center connected to all IEDs?IEDs?

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Case A - Solution

intelligent RTU • intelligent RTU (iRTU)

• Low cost• I/O for retrofit• I/O for retrofit• Communications

integration• All-in-one• All in one

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Case B - Over-current fault d t tidetection

• Performing fault detection requires • Performing fault detection requires using specific devices that can detect over current conditions over-current conditions.

• When a fault occurs the sensors will t thi t t th C t l C t report this event to the Control Centre

through a small RTU. • The fault detectors allow the Control

Centre to isolate the affected area very quickly.

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Case B - Solution

• intelligent RTU • intelligent RTU (iRTU Lite)

• Low cost• 8 digital inputs8 digital inputs• Internal

GPRS/EDGE GPRS/EDGE modem

• GOOSE reports

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Case B - Protocol stack used

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Data concentrators

• MV telecontrol means many concurrent connections.

• The Control Centre must be freed from the communications management and pass to it only relevant information.p y

• With a hot-standby configuration.• Translation to current Control Center • Translation to current Control Center

protocol (DNP3, 101 or 104).A GOOSE t t h dl • A GOOSE concentrator can handle a high volume of fault detectors.

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Data concentrators

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Conclusions

• Remote control of the MV grid allows faster faster correction of faultscorrection of faults.

• Use of advanced RTUsadvanced RTUs integrate reliable and d t i ti i IP secure data communication using IP

networks. • Found two scenarios solved with two optimal optimal • Found two scenarios solved with two optimal optimal

solutionssolutions based on IEC-61850 standard. • Solutions based on standard protocols and • Solutions based on standard protocols and

providing forwardforward path compatibilitypath compatibility.• Take advantage of IECIEC--61850 benefits 61850 benefits to use Take advantage of IECIEC 61850 benefits 61850 benefits to use

it in WAN networks.

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Thanks

iGrid T&D

Parc d’Innovació La SalleParc d Innovació La SalleC. Sant Joan de la Salle, 4208022 – Barcelona

Web : www.igrid-td.com

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