Control Strategy for Renewable Energy System Using Transformerless HERIC Bridge Inverter

Abstract

This paper presents a transformer-less electrical converter is a power converter that synthesizes voltage from several levels of DC voltages. In Transformer-less electrical converter, selective harmonic elimination is major one for each medium-and high-voltage applications. The performance of output voltage and power is increased with the reduction of total harmonic distortion. Harmonic elimination in Transformer-less inverters established huge thought for past few decades with the smallest total harmonic distortion. But, the elimination of selective harmonics in Transformer-less electrical converter still experiences certain drawbacks. Recently, several analysis works are introduced for enhancing the performance of output voltage and power in transformerless electrical converter. In an existing hybrid formula was projected in seven-level Transformer-less electrical converter for selective harmonic elimination with condensed switches. HERIC optimization based mostly Selective harmonic elimination methodology is proposed for selective harmonic elimination with known optimum switching angle. Then, switching angle is measured and initialized for activity of the memetic optimization. The output voltage improvement is earned by proposing a shuffled frog leaping switching angle optimization based mostly selective harmonic elimination methodology in transformer-less inverters. After initializing switching angles, shuffled frog leaping switching angle optimization algorithm is utilized for selective harmonic elimination. A 120W model was also designed and tested in the laboratory, and the simulation and experimental results are finally conferred to show the wonderful performance of the proposed PV electrical converter.