A Quadruple Gain Fault-Tolerant Nine Level Cascaded Inverter

The cascaded H-bridge (CHB) inverter is one of the most prominent multi-level inverters among conventional inverters for renewable energy applications. However, CHB inverters have a significant number of components, there is a larger possibility of failure, lowering system reliability. Fault-tolerant quadruple gain nine-level cascaded inverter is proposed in this paper. The proposed configuration uses an additional quadruple gain nine-level inverter in companion with the existing CHB inverters to maintain the same number of levels in output voltage and continuous operation during open circuit/short circuit (OC/SC) faults on the CHB inverters. The operation of the proposed configuration is validated during OC/SC faults on HB inverters with MATLAB/simulation results and experimental results.