A Survey of Multilevel Inverter based on Cascaded H-Bridge Topology and Control Schemes

In this study, a review of cascaded H-bridge multilevel inverter topology and control schemes was conducted. Multilevel inverter topology (MLI) H-bridge cascade is implemented to reduce harmonic for high power applications. Applications of multilevel converters are able to reduce the number of harmonics contained in the system of low-voltage electrical distribution. Each topology has their own advantages and disadvantages. The cascaded H-bridge multilevel inverter topology requires only a single DC power source with both input and output, high availability, and the control of power flow in the regenerative version. The selected switching technique to control the inverter will also have an effective role on harmonic elimination while generating the ideal output voltage. Intensive studies have been performed on carrier-based, sinusoidal, space vector and sigma delta PWM methods in open loop control of inverters. The results from this study represent a beneficial basis for matching of inverter topology and the best control scheme according to different application areas.