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배창한(Bae Chang-han),한문섭(Han Mun-seub),김용기(Kim Yong-ki),방효진(Bang Hyo-jin) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
In this paper, a real-time digital kalman filtering algorithm is used to obtain the reference estimation of the control current for shunt active power filter. This algor ithm provides the best estimate of the fundamental and harmonic frequency components from the sampled values of the line current or voltage waveform. By adopting of the digital Kalman filtering algorithm, the structure of the control algorithm eliminates the need of a Phase locked loop(PLL) for the synchronization of the reference signal used in the compensation and it not sensitive to the distortion of the line voltage. The effectiveness of the algorithm is confirmed by the computer simulations.