Synchrophasor Initiative in India - erldc

SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012the control centre which hitherto was possible only in offline mode in the form of substationDisturbance Records or through offline dynamic simulations performed on network models.The Phasor Measurement Unit (PMU) is the basic building block of Wide Area MeasurementSystem (WAMS). The PMU measures the system state viz. voltage and angle of a particularlocation at a rate of multiple samples per second (say 25 samples per second). This data is timestamped through a common reference and transmitted to the Phasor Data Concentrator (PDC)installed at a nodal point, through high speed wideband communication medium (such asOptical Fibre). The PDC aligns the time synchronized data and presents it to the User/Historian.The Historian archives the data for retrieval and post-dispatch analysis of any grid.World over the synchrophasor technology is increasingly being used for supplementing theconventional SCADA / EMS for providing a wide area visibility and enhancing situationalawareness at the control centre. In India, pilot/ demo projects have been taken up or envisagedin all the five regions. This report enumerates the features available in the synchrophasorpilot/demo projects taken up in India since May 2010. It provides a compilation of case studiesdescribing various real-time and offline application of the synchrophasors data. The reporthighlights the major challenges encountered in the tenure of the past two years. The reportconcludes with the proposed suggestions, future scope and probable roadmap for furtherexploitation of synchrophasors technology in India.Overview of the synchrophasor initiative in IndiaIn India, fourteen (14) Phasor Measurement Units (PMUs) have been commissioned as on 31 stMay 2012. In the Northern Region, the PMUs have been placed at nine 400 kV substations viz.Vindhyachal (HVDC back-to-back station), Kanpur (with SVC), Dadri (HVDC inverter terminal),Moga, Kishenpur, Agra, Bassi, Hisar and Karcham Wangtoo. In Western Region PMUs havebeen placed at two 400 kV substations viz. Raipur and Bhadravati. In Southern Region, theyhave been placed at three 400 kV substations viz. Salem, Hyderabad and Bengaluru. The threePhasor Data Concentrators (PDC) have been installed at the respective Regional LoadDespatch Centres (RLDCs) located in New Delhi, Mumbai and Bengaluru. Placement ofPMUs/PDCs at few more locations in India has been envisaged under the pilot projects takenup by the RLDCs. The WAMS in Western and Southern Region are demonstration projects,while in the Northern Region the expenditure under the pilot project was approved by theHonourable Central Electricity Regulatory Commission (CERC) and funded from theUnscheduled Interchange Pool Account.Application of synchrophasor data available through the pilot projectThough the synchrophasors data is presently available only from a few locations in the Indiangrid, yet it has dramatically raised visualization and the level of understanding of the powersystem at the control centres within few months of its commissioning. It has enhancedsituational awareness in real-time. In the offline mode the synchrophasors data is being utilizedPOSOCO Page 8 of 143