THD minimization of ZVT -ZCT Quasi Resonant SEPIC Converter with proposed Harris Hawks Optimization Technique

In this paper ZVT (Zero Voltage Transition)-ZCT (Zero Current Transition) based Quasi Resonant SEPIC (QRSEPIC) converter with a Voltage Source inverter (VSI) using optimization algorithm is proposed. The proposed converter uses solar energy as its input, which is a sustainable form of energy. In this paper special attention is paid to pulse width modulation (PWM) techniques, which aim to reduce the harmonic content. The harmonics are controlled due to the switching techniques. Rigorous work has been done for the reduction of harmonic content with various algorithms and optimization technique. This paper suggests optimization control technique to generate the PWM pulses, based on Harris Hawks Optimization algorithm to minimize the objective function. For this switching control of the proposed QRSEPIC converter, the system performance is improved, and Harmonic distortion is controlled. Further computation is done for the enhancement of efficiency. Simulation studies were carried out with MATLAB/Simulink for photovoltaic systems, and it was observed that the QRSEPIC with Harris Hawks algorithm gave better results compared to other optimization methods. The proposed method achieves an efficiency of 99.01 percentage and the reduction in THD to 0.832 percentage.