Use of IEC-61850 to telecontrol MV grids PAC W orld Conference David Bru i Bru – Technical Director at iGrid T&D 29 th June 2011 Dublin Ireland 29 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 2 OP_030
Contents Control over MV grid MV grid Considerations Considerations Tools Tools Cases Cases Solutions Solutions Low cost IP Remote SAIDI SAIDI networks switchgears Communications Robustness Robustness Fault Renewables IEC 61850 detection Future-proof 3 OP_030
MV telecontrol considerations • Low Cost: Equipment, commissioning q p , g and communications • Communications media • Communications media independent • Off-the-shelf products • Future-proof Future proof • Robustness: EMC + temperature and h humidity. idit 4 OP_030
The communications media • TCP/ IP networks – Integration of private and public I i f i d bli networks. – Media independent • Today networks for MV telecontrol Today networks for MV telecontrol – Private networks (TETRA, xDSL, ...) • Investment required. I t t i d • Secure communications. – Public networks (GPRS, Wimax, ...) P bli k (GPRS Wi ) • Cost effective solution. • Suited for non-critical points. 5 OP_030
The communications media OP_030 6
Why IEC-61850? • Protective devices available to all applications applications • More functionalities • Generic widely available technology • Share common: protocol, data format, naming, configuration. • Easy and secure deployment (configure y p y ( g and commissioning) • Low traffic Low traffic • Future 7 OP_030
Case A - Remote Control of MV switchgears switchgears • Use of MMS/ 61850 Use 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. • Events submitted using Buffered Report E t b itt d i B ff d R t Control Blocks (BRCB). • Measurements submitted using Unbuffered Report Control Blocks (URCB). 8 OP_030
Case A - Measurements OP_030 9
Case A – Today’s handicaps • Many facilities require retrofit Many facilities require retrofit • 61850 equipment more expensive than conventional than conventional • Control center connected to all IEDs? IEDs? 10 OP_030
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 11 OP_030
Case B - Over-current fault detection d t ti • 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 report this event to the Control Centre t thi t t th C t l C t through a small RTU. • The fault detectors allow the Control Centre to isolate the affected area very quickly. 12 OP_030
Case B - Solution • intelligent RTU • intelligent RTU (iRTU Lite) • Low cost • 8 digital inputs 8 digital inputs • Internal GPRS/ EDGE GPRS/ EDGE modem • GOOSE reports 13 OP_030
Case B - Protocol stack used OP_030 14
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 concentrator can handle a A GOOSE t t h dl high volume of fault detectors. 15 OP_030
Data concentrators OP_030 16
Conclusions • Remote control of the MV grid allows faster faster correction of faults correction of faults. • Use of advanced RTUs advanced RTUs integrate reliable and secure data communication using IP d t i ti i IP networks. • Found two scenarios solved with two optimal • Found two scenarios solved with two optimal optimal optimal solutions solutions based on IEC-61850 standard. • Solutions based on standard protocols and • Solutions based on standard protocols and providing forward forward path compatibility path compatibility. • Take advantage of IEC Take advantage of IEC IEC-61850 benefits IEC 61850 benefits 61850 benefits to use 61850 benefits to use it in WAN networks. 17 OP_030
Thanks iGrid T&D Parc d’Innovació La Salle Parc d Innovació La Salle C. Sant Joan de la Salle, 42 08022 – Barcelona Web : www.igrid-td.com 18 OP_030
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