Reduction of THD in Single Phase PAF with PSD Method for Reference Current Generation
A. Jeraldine Viji1, M. Sudhakaran2
1A. Jeraldine Viji, is Assistant professor with Electrical and Electronics Engg Department Mailam engg college,Mailam,villupuram Dist Tamil Nadu,India.
2Dr. M. Sudhakaran, is Prof with Electrical and Electronics Engg Department, Pondicherry Engg college, Pondicherry, India.
Manuscript received on may 27, 2012. | Revised Manuscript received on June 22, 2012. | Manuscript published on June 30, 2012. | PP: 31-34 | Volume-1 Issue-5, June 2012 | Retrieval Number: E0398051512/2012©BEIESP

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Abstract: In this paper Single phase parallel active filter (PAF) with a control algorithm of power synchronous detection method for reference current generation is proposed .The current waveform injected by the active filter is able to compensate the reactive power and the load current harmonics and to balance asymmetrical loads. The active filter designed in PSIM software and control of active filter is done in Simulink environment. PSIM and MATLAB software is linked by Sim coupler. The capacitor voltage is maintained constant by using PI controller. Simulation results with PSIM software show that the designed active filter is very effective in improvement of quality of power. 
Keywords: Active filter, Hysteresis Band controller, Power Synchronous detection (PSD), current harmonics, Pulse Width Modulation, PSIM software.