Implementation of an Efficient SVPWM Technique to a Cascaded Multilevel Inverter-Based SAF

In this paper, an efficient space vector modulation (SVPWM) technique is implemented to a shunt active filter (SAF) for harmonic mitigation under extreme nonlinear loading. When a multilevel inverter operates as a SAF, it should be able to generate harmonic current with an extended bandwidth compared to its open-loop operation. Many conventional SVPWM techniques require higher memory for the storage of switching states, and the computation time also increases exponentially with added complexity. The proposed algorithm is valid in any typical multilevel inverter topologies, can be applied to any no. of phase and has less computational cost and also suitable for hardware implementation. The paper describes the logical approach and implementation of the suggested SVPWM algorithm. A comparison is made with two different, multilevel PWM techniques for switching of the proposed SAF. Finally, the effectiveness of the SVPWM algorithm is confirmed over simulation and experimental study.