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Use of IEC61850 to telecontrol MV grids (2011 PAC World Conference - Presentation)
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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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