Simulation for Fault Forbearance Operation for Three-Phase Three-level H-Bridge Multilevel Inverter by Space Vector Modulation technique

This paper represents the fault tolerance technique of three-phase three-level H-Bridge Multilevel inverter. Near about equal output voltages are generated in single fault and pre-fault conditions. Regardless of the appearance of fault location and its class, three-phase balanced voltage is generated with its peak amplitude. The auxiliary module is connected which is voltage source two-level inverter along with a dc capacitive link. After fault detection, the auxiliary module gets activated and the capacitor charging and discharging starts and then the voltage across the auxiliary module is constant and the reference Vector is synchronized. The validation of the proposed technique is affirmed by simulations on a three-level H-Bridge for three-phase Inverters.