Synchrophasor Initiative in India - erldc

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SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012• Sample Rate (50Hz): 1000 Samples/Cycle• Communication Protocols: Ethernet (TCP and UDP)• Voltage Module Specification : 3-Channel, 300 V rms , 24-Bit, Simultaneous, Channel-to-Channel Isolated Analog Input Module• Current Module Specification: 4 current input modules were designed to measure 5 A rmsnominal on each channel with channel-to-channel isolation.• Built-in anti-alias filtersPhasor Data Concentrator – open PDC in Western RegionThe PDC installed at WRLDC by Infosys is software PDC (openPDC) which is developed as anopen source technology by Grid Protection Alliance (GPA). The openPDC is a complete PhasorData Concentrator software system designed to process streaming time-series data in real-time.Measured data gathered with GPS-time stamp from numerous input sources (here PMU) istime-sorted and displayed on a common display window. The acquired data is also archived foroffline studies and historian trending. It Supports IEEE C37.118 with added advantage thatother protocols for phasor like IEEE 1344, BPA PDC stream, FNET, SEL Fast Message, andMacrodyne are also supported. Data flow in openPDC consists of adapters which can be splitinto three layers:i. The input adapter layer is typically responsible for receiving data from an outside source(PMU). That data is used to create measurements which are sent to other adapters to beprocessed or archived.ii. The action adapter layer is typically responsible for concentration and processing of theinput measurements.iii. The output adapter layer is typically responsible for archival of measurements receivedfrom the input adapter layer and the action adapter layer.These adapters can be configured using any one of three supported databasesystems: Microsoft SQL Server, MySQL, and Microsoft Access.POSOCO Page 44 of 143
SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012Figure 30: Open PDC data flowPMU InstallationAs a prerequisite for PMU logistics, substations were requested to make necessaryarrangements for power supply (220 VAC or 24 VDC) and to extend connections from meteringcore of PT and CT.Installation of PMU at BhadrawatiAt Bhadrawati the PMU was installed in 400 kV Raipur Feeder-I which is housed in the 400 kVAC Control Room along with dedicated GPS module. However, existing MUX for routing data toWRLDC was housed in 400 kV HVDC Control Room which is around 1.5 kms away from the ACControl Room. Ethernet cable normally used for data communication will not be able to carrydata over the distance in this case. The situation was resolved using media converters and anexisting spare FO cable already laid between the AC and HVDC Control Rooms. Installationand integration of Bhadrawati PMU was completed on 14 th March 2012.Installation of PMU at RaipurPOSOCO Page 45 of 143
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