Synchrophasor Initiative in India - erldc

SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012Figure 108: Flow on Hyderabad-Ramagundam (HVDC Bhadrawati = 900 MW) .................................... 109Figure 109: R phase voltage of Raipur and Bhadrawati when HVDC flow is 750 MW ........................... 110Figure 110: Frequency plot when power flow on HVDC Bhadrawati is 750 MW .................................... 110Figure 111: Oscillations seen in Raipur and Bhadrawati when HVDC flow is 900 MW ......................... 111Figure 112: Oscillations in frequency when power flow on HVDC Bhadrawati is 900 MW ..................... 111Figure 113: R phase voltage at Bhadrawati showing frequency of oscillations ...................................... 112Figure 114: R phase voltage at Raipur showing frequency of oscillations ............................................. 113Figure 115: FFT of frequency at Bhadrawati (HVDC B’wati flow 750MW) ............................................ 114Figure 116: FFT of frequency at Raipur (HVDC B’wati flow is 750MW) ................................................. 114Figure 117: FFT of frequency at Hyderabad (HVDC B’wati flow 750MW) ............................................. 115Figure 118: FFT of the frequency at Bangalore (HVDC B’wati flow is 750MW) ..................................... 115Figure 119: FFT of the frequency at Salem ( HVDC B’wati flow is 750MW) .......................................... 116Figure 120: FFT of the frequency at Bhadrawati ( HVDC flow is 900 MW) ............................................ 117Figure 121: FFT of the frequency at Raipur ( HVDC flow is 900 MW) ................................................... 117Figure 122: FFT of the frequency at Hyderabad ( HVDC flow is 900 MW) ............................................ 118Figure 123: FFT of the frequency at Bengaluru ( HVDC flow is 900 MW).............................................. 118Figure 124: PMU plot for Vindhyachal frequency showing the three incidences .................................... 120Figure 125: df/dt observed from Raipur PMU ....................................................................................... 121Figure 126: Prony Analysis of Frequency using 8 exponentially sine damped case .............................. 121Figure 127: Prony Analysis of Frequency using 6 exponentially sine damped case .............................. 122Figure 128: Prony Analysis of Frequency using 6 exponentially sine damped case .............................. 123Figure 129: df/dt profile during tripping of Dadri NTPC on 19th July 2011 ............................................. 125Figure 130: Hisar frequency during generation loss of 1100MW at Khedar TPS in Haryana ................. 126Figure 131: Data loss of Kanpur PMU on 1st April 2011 ....................................................................... 133Figure 132: Drift seen in voltage plot during oscillations on 3rd February 2011 ..................................... 134Figure 133: Spikes seen in angular difference during a grid event ........................................................ 134POSOCO Page 6 of 143