Synchrophasor Initiative in India - erldc

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SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20123.3 Architecture in Southern RegionThe pilot project implemented in Southern Region has three PMUs installed at 400 kVHyderabad, 400 kV Salem and 400 kV Bengaluru. The three locations were selected based onavailability of communication as well as their importance in giving a view of power systemdynamics in SR. The PMUs report to Phasor Data Concentrator via the existing widebandcommunication links available. The phasor monitoring application consists of historian, webbased user interface and play back function for off line application. It also consists of aproprietary oscillation monitoring system for event analysis. A limited SCADA interface has beenalso successfully implemented integrating PDC with scada. This is albeit with limitations ofSCADA but helps real time operators to view the angular separation and df/dt. Considering theconstraints of wideband speed and availability PMUs have been configured in the followingmanner.Table 7: Features in PMUs in Southern RegionS No. Attribute Property1 PMU data update 25 samples/second2 Phasors Vr, Vy, Vb magnitude & angleIr, Iy, Ib magnitude & angleFrequency and df/dt3 Sequence components of phasors V+, V-, V04 Analog MW, MVAr, pf5 Communication profile UDP6 Communication protocol C37.1187 Bandwidth 64 kbpsPOSOCO Page 48 of 143
SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20123.3.1 SpecificationsFigure 34: Architecture in Southern RegionFigure 35: Data flow and protocols in Southern RegionPOSOCO Page 49 of 143
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