Implementation of interleaved soft switching boost converter and H-bridge inverter for solar pv power generation system to attain maximum output voltage and reduced harmonics

Abstract

Solar energy is a non-conventional type of energy. Only a small fraction of the available solar energy is used in practice. Solar powered electrical generation relies on photovoltaic system and heat engines. To harvest the solar energy, the most common way is to use photovoltaic panels which will receive photon energy from sun and convert to electrical energy. The efficiency of PV module is very low and power output depends on solar insulation level and ambient temperature, so maximization of power output with greater efficiency is of special interest. In this paper, an interleaved soft switching boost converter (ISSBC) for a photovoltaic (PV) power-generation system is proposed. The topology used raises the efficiency for the dc/dc converter of the PV power conditioning system (PVPCS), and it minimizes switching losses by adopting a resonant soft-switching method. This project proposes a novel soft-switching interleaved boost converter composed of two shunted elementary boost conversion units and an auxiliary inductor. The proposed controller scheme utilizes PWM techniques to regulate the output power of interleaved boost converter at its maximum possible value and simultaneously controls the charging process of battery. This converter is able to turn on both the active power switches at zero voltage to reduce their switching losses and evidently raise the conversion efficiency. Since the two parallel-operated elementary boost units are identical, operation analysis and design for the converter module becomes quite simple. The resulting system has high-efficiency, lower-cost, very fast tracking speed. The circuit will be simulated using MATLAB Simulink.