Abstract
Multilevel inverters (MLIs) are used on a large scale because they have low total harmonic distortion (THD) and low voltage stress across the switches, making them ideal for medium- and high-power applications. The authenticity of semiconductor devices is one of the main concerns for these MLIs to operate properly. Due to the large number of switches in multilevel inverters, the possibility of a fault also arises. Hence, a reliable five-level inverter topology with fault-tolerant ability has been proposed. The proposed topology can withstand an open-circuit (OC) fault caused when any single switch fails. In comparison to typical multilevel inverters, the proposed topology is fault-tolerant and reliable. The simulation of the proposed topology is conducted in MATLAB-Simulink and PLECS software packages, and the results obtained for normal pre-fault, during-fault, and after-fault conditions are discussed. Experimental results also prove the proposed cell topology’s robustness and effectiveness in tolerating OC faults across the switches. Furthermore, a thorough comparison is provided to demonstrate the proposed topology’s superiority compared to recently published topologies with fault-tolerant features.
Highlights
An ever-increasing demand for electrical energy has resulted in the severe depletion of traditional energy sources, which has led to large-scale research into a renewable energy source (RES)-based power generation
Power factor curve7b as we shows the power loss loss vs. power curve as we observe that power will bedecreasing more observe that power will be factor more for modulation index equals one andloss continues for modulation index one and continues decreasing we decrease thewith modulation as we decrease the equals modulation index
This paper proposed a modified five-level fault-tolerant topology
Summary
An ever-increasing demand for electrical energy has resulted in the severe depletion of traditional energy sources, which has led to large-scale research into a renewable energy source (RES)-based power generation. Multilevel inverters were first introduced in early 1975 [1]. These MLIs are becoming increasingly popular due to their high voltage operation ability, higher efficiency, lower switching losses, and lesser electromagnetic interference [2]. MLIs are one of the best options to fulfill the increasing demand for power. MLIs can produce staircase-like AC voltage by the unique connections of switches with DC sources [3]. Due to these advantages, MLIs are widely used in place of two-level inverters
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