Synchrophasor Initiative in India - erldc

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SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20125.6.5 Case Study-33: Identification of coherent group of generatorsKnowledge of coherent group of generators during inter area oscillations is important for takingappropriate measures for suppressing the inter area oscillations.Figure 104: Swing in frequency during tripping of Rihand-Dadri bipoleFigure 104 shows the frequency profile recorded by PMUs during the tripping of HVDC Rihand-Dadri bipole carrying 1400 MW. It can be observed that the generators near Vindhyachal areswinging with respect to generators located near Dadri.Figure 105: Swing in frequency during generation loss at Rihand STPSFigure 105 shows the frequency profile recorded by PMU’s during incident of 2000MWgeneration loss at Rihand STPS. Similar patterns of swinging of generators as seen above areobserved.POSOCO Page 106 of 143
SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012Figure 106: Swing in frequency profile during generation loss at Kota TPSFigure 106 shows the frequency profile recorded by PMU’s during incident of generation loss atKota TPS in Rajasthan. It can be observed that all the frequencies are swinging in the samedirection.POSOCO Page 107 of 143
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Synchrophasor Initiative in India - erldc

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