A novel approach on power quality improvement by multi-carrier multilevel inverter topology

This paper proposes a new PWM generation scheme for the three phase five level cascaded multilevel inverter. The main objective of this paper to improve the power quality by using various multi-carrier PWM methods. Generally multi-carrier-based methods have been used widely for switching of multilevel inverters due to their simplicity, flexibility and reduced computational requirements compared to Space Vector Modulation (SVM) techniques. Several multi-carrier modulation methods with miscellaneous properties have been already known. While evaluating and comparing these methods, such as PD, POD and APOD through measures like total harmonic distortion (THD) the paper shows their advantages for applications of Cascade multi-level topologies by simulation results. Finally simulation results and experimental results are discussed.