Design and Development of an Efficient Resonant Boost Converter Topology and Adaptive Maximum Power Point Tracking for Photovoltaic Power Conversion System

Abstract

Global CO2 emission is increasing continuously in the atmosphere, and one of the main reasons behind it is the excessive use of fossil fuels in power plants, industries, vehicles and other human activities. Emerging future technologies in power generation and automotive newlinesectors must rely on alternate inexhaustive energy sources such as wind, solar, hydro and newlinegeothermal. Among all of them, photovoltaic (PV) power conversion system is the most newlinepromising technology worldwide due to its various advantages such as availability, newlinepollution-free and nominal maintenance. Maximum energy utilization from PV system newlinedepends on the design of efficient DC-DC power electronic converter along with irradiance variation and shading on PV cells. Appropriate selection and operation of the high-frequency power converter with reduced losses and electromagnetic interference (EMI) is the prime concern of global technology providers. This research work focuses on the selection of appropriate power electronic converter and adaptive MPPT algorithms to improvise the PV power conversion system. newlineA single PV module acts as a micro-source with low DC voltage level (20-40 V) and newlinea voltage lift-up circuitry is required to boost the voltage level up to 380-400V for microgrid newlineor next DC-AC conversion stage. To meet this level of voltage boost, the first part of this thesis discusses the design of two quadratic quadrupler boost (QQB) converter topologies to achieve the desired voltage gain. Both proposed converters contain a voltage quadrupler newlinecircuitry connected to a cascaded boost converter using a coupled inductor. The feasibility of converter was analyzed using PSIM software to observe the performance and key waveforms in continuous conduction mode (CCM) and discontinuous conduction mode newline(DCM) of operation. To reduce the switching losses, zero voltage switching (ZVS) is newlinerealized using magnetizing inductance and parasitic capacitance of MOSFETs. Similarly, newlinezero current switching (ZCS) of diodes in quadrupler circuit is achieved.