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Power Quality Improvement using Five Level Active Power Filter with SRF Control Technique

K. Vasantha Sena

Interest of using shunt active power filters is increased in recent years. This paper presents aninnovative synchronous reference frame (SRF) controlled five-level and seven-level cascaded multilevel inverter based shunt active filter for power line conditioners (PLCs) to improve the power quality in the distribution system. Synchronous reference frame is used to control reactive power and harmonics compensation due to non-linear loads. The cascaded multilevel inverter is controlled by the triangular wave produced by the SRF. PI controller is used to maintain almost constant under transient and steady state condition. The proposed new model is simulated using MATLAB/SIMULINK and simulation results are demonstrated.