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Improvement of Power Quality Using Hybrid Active Power Filter in Three- Phase Three- Wire System Applied to Induction Drive

B. Mohan Reddy, G.Balasundaram

Nowadays an electrical system must provide adequate electrical power quality so that it meets the international standards. To do this, this paper develops a control strategy for an active compensator based on a hybrid filter topology. This topology is formed by an active power filter of series connection and a passive filter of parallel connection. In addition to harmonic current compensation, the hybrid filter is designed to compensate both positiveand negative-sequence reactive power based on the so-called instantaneous power theory. Therefore, the compensated system behaves as a resistive network even in a reactive, nonlinear, or unbalanced circuit. The simulation results are obtained using MATLAB/SIMULINK software.