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《Automation of Electric Power Systems》 2004-04
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REAL-TIME MEASUREMENT OF THE POWER SWING FREQUENCY BASED ON THE GENERALIZED PHASOR

Chen Zhaohui, Huang Shaofeng, Yang Qixun (North China Electric Power University (Beijing), Beijing 100085, China)  
An algorithm based on the magnitude and phase angle of the generalized phasor to measure instantaneous frequency and swing frequency while the power swing occurred is presented. The generalized phasor is transformed by three-phase currents. There is no approximation in the deduction of the algorithm. The frequency measurement can be completed in only two sampling intervals, ideally. Extensive simulation studies show that the algorithm has a fast response and high accuracy. The algorithm is useful in improving the performances of the protective relay and stability control devices during the period of time of power swing.
【CateGory Index】: TM712;TM93
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