Fault-tolerant cascaded H-bridge inverter connected to power grid

Nowadays, the use of inverters is increasingly required in domestic and industrial installations, electrical energy production plants, and in several other areas for the conversion from the DC form to the AC form of the electrical energy such as aviation, maritime and especially in the field of Parallel Active Filtering where it constitutes the capital element for the injection of harmonic compensating energy into the electrical network. In the interest of ensuring its reliability and especially its availability, it is therefore important to design its fault-tolerant model. In this paper, we propose a new model of cascaded H-bridge inverter which could even in the presence of faults, continue to deliver a voltage of value equal to that in normal operating mode. The results of simulations carried out using the Matlab/Simulink software show good performance of the proposed inverter.