DEVELOPMENT OF CONVERTER SYSTEM FOR SOLAR PV POWER GENERATION

Abstract

Renewable energy resources will be an increasingly important part of power generation in the new millennium. Besides assisting in the reduction of the , emission of greenhouse gases, they add the much needed flexibility to the energy resource mix by decreasing the dependence on fossil fuels. PV systems are widely used among all renewable energy sources because of its advantages like easy installation, static structure, highly modular, long life time, highly mobile and portable. PV systems consist of a PV generator (cell, module, array), energy storage devices (such as batteries), AC and DC consumers and elements for power conditioning. The branch of power electronics in power conditioning is used to describe the management of electrical energy to effectively charge batteries, draw maximum power from the solar panels, or provide a high quality AC output. In power conditioning branch, converters are most important devices to meet load requirement. In this report mainly focused on power conditioning system for solar power generation. The main objective of this project is to develop a power conditioning system, which can be used to extract the variable solar DC power from sun and convert it into AC power to feed AC load effectively. This paper presented the simulation results of Photovoltaic (PV) power conditioning system for AC loads. The conditioner consists of a diode clamped three level inverter fed by closed loop voltage controlled DC- DC Boost converter. This closed loop control of DC- DC converter is implemented by a conventional Pulse Width Modulator (PWM) in duty cycle ratio control method; This boost converter is designed to obtain regulated voltage from the variable solar power. A level shift sinusoidal PWM is used to control the multilevel inverter on FPGA.