Paper Details

There is a noticeable difference in fault detection technique of series compensated transmission line duringusual operating condition and power swing condition due to certain reasons like frequency modulation, sub-harmonicoscillations, transients etc. Particularly during power swing condition the frequency of power change is modulated and itis twice of frequency of voltage variation and current variation. So, cycle to cycle or sample to sample comparison is notreliable here. Other methods like Voltage Change, Current Change or Impedance change methods are also notapplicable during power swing condition. Transients and sub-synchronous resonance activity in series-compensated lineappear due to inclusion of capacitor in transmission line. So, fault detection during power swing condition in case ofseries-compensated line is extreme difficult. In this paper a method is developed to detect fault of series-compensatedtransmission line during power swing condition. Here it proposes a negative-sequence current based technique fordetecting presence of fault during the power swing condition in a series-compensated line. The proposed approach is acumulative sum (CUSUM) of change in the magnitude of the negative-sequence current based approach and is tested foran SMIB system. Various types of faults like Symmetrical, asymmetrical, and high resistance occurring during the powerswing are simulated through EMTDC/PSCAD to test algorithm.

Patel Sharadchandra J, Patel Nilaykumar A, “A Cumulative Sum-Based Fault Detection Technique for the Series-Compensated Line During Power Swing”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 11, pp. 1-10, November 2015.