WITHDRAWN: Red Deer Optimization Based Grid Interactive Asymmetrical Reduced Switch Multilevel Inverter with Low Output Harmonics using Single PV Source

Abstract This paper proffers a Multilevel Inverter (MLI) topology that designed with minimum number of power switch with a single voltage source. This reduced MLI is energized by Photo Voltaic (PV) module and integrating with low voltage grid, which is cost effective with minimum number of switching devices and input voltage sources. Asymmetrical voltages are provided through series capacitors across PV boost voltage, which resulted different grading of voltage levels at the output side of reduced MLI. This output voltage has provided a smooth sinusoidal waveform than the symmetrical one. The proposed algorithm has overcome the deprivation of cascade H-bridge MLI and conventional two-level inverter with low switching loss and minimum switching stress. The varying capacitance ratio with respect to a reference value and required switching pulses are determined by the help of a new metaheuristic algorithm called Red Deer Optimization (RDO) algorithm. This algorithm has optimized the Total Harmonics Distortion (THD) of a grid tied three-phase reduced H-bridge MLI to 2.33% and has properly balanced the capacitance ratio across source voltage for which the MLI has resulted less distorted voltage and current waveforms across grid side. The performance of this new metaheuristic algorithm has been compared with Particle Swarm Optimization (PSO) and Grey Wolf Optimization (GWO) algorithms to prove its potency. The operation and efficiency of this proposed reduced MLI has been endorsed with the help of simulation and experimental results as well.