Quasi-proportional Resonance Control Strategy Based on Hybrid Active Power Filter
Due to the large use of power electronic equipment,soft starter and various nonlinear loads,the harmon-ic suppression control strategy of shparallel hybrid active power filter(HAPF)was studied in this paper.On the basis of this topology,the mathematical model was established and the quasi-proportional resonance controller and propor-tional integral controller were designed for experimental simulation.In order to solve the problems of low compensation accuracy and non-static error tracking of AC signal,a control strategy combining the current inner loop quasi-propor-tional resonance control and the hybrid active power filter dc side voltage outer loop proportional integral controller was proposed.The model was built on Matlab/Simulink.The simulation and experimental results show that the pro-posed control strategy can compensate harmonic current caused by nonlinear load,and the total harmonic distortion(THD)of power grid current after compensation is reduced to 3.68%,which meets the national standard.
Hybrid active power filterProportional integral controlQuasi-proportional resonance controlTotal harmonic distortion
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