Simplified algorithm of 3D-SVPWM in three level 3-phase 4-wire active power filter

3D-SVPWM algorithm is used for synthesizing the desired bridge output voltage and generating compensation currents to cancel the harmonics. In this paper, depict the detail step for calculate the command vector and duty cycle of each leg in three level 3-phase 4-wire shunt active power filter system. After induction, proposed a simplified 3D-SVPWM algorithm. Compare to the traditional 3D-SVPWM algorithm, the proposed SVPWM algorithm simplified the operation, and shorten calculating time. Simulation and experimental results validate the correctness and feasibility of proposed algorithm.