Design of solar powered modified coupled inductor capacitor multiplier boost converter for three phase small power inverter

Abstract

The growing population, commercial building, Information Technology (IT) sector, industry leads to the rise in energy consumption. If the energy demand is not appropriately addressed, the issues such as acid rain, air pollution, ozone exhaustion and global warming will arise in the future. Renewable energy sources such as biomass, wind, geothermal energy and solar have emerged as a viable alternative to traditional energy sources in order to address the aforementioned challenges. Renewable energy sources are limitless, abundant and nonpolluting. Solar energy is one of the most commonly used renewable energy sources in recent years. This is due to the fact that solar panels have non rotating parts which can eliminate the vibration and noise. It is also protected from the erection of huge towers. Photovoltaic (PV) panels convert solar irradiance into electrical energy, which is then used to create electricity. The power converters namely: 1) DC-DC converter and 2) Single-phase/Three-phase power converters are the key element of the grid connected PV applications. The above two devices are acting as a interface between the PV array and the grid/local load. The utilization of solar energy source necessitates a very high step-up conversion of their low voltage to the application voltage. By operating the conventional DC-DC boost converters at extremely high duty ratio offers high voltage gain to the system. In theory, when the duty ratio is close to unity, the voltage gain is infinite. However, the switching losses and reverse-recovery losses of the output diode and active switches are significantly high. This thesis begins with the implementation of Two Port Coupled Inductor and Capacitor Multiplier (TPCICM) configuration to know the potential merits of the coupled inductor-based topology. Followed by the implementation of the conventional TPCICM boost converter, the design and functional modes and implementation of the proposed Modified Coupled Inductor and Capacitor Multiplier (MCICM) boost converter has been pres