Design and test a variable level inverter for hybrid energy system

This thesis presents the design and implementation of a single-phase grid-connected Sinusoidal Pulse Width Modulation (SPWM) microcontroller based inverter. It produces an ac output voltage of desired magnitude and frequency. Nowadays, the inverters are important at the main power supply. A hybrid renewable energy system is used to provide the DC bus voltage. The electricity is provided by two production systems; a wind turbine and PV array. This system is called as hybrid energy system. The hybrid energy system has been established in Ege University Solar Energy Institute campus area. The system contains a wind turbine, photovoltaic array, a charge regulator, a driver unit, a full-bridge inverter unit, an output filter, a control unit and dsPIC based microcontroller unit. The input power stage provides +48 V DC bias voltage to the battery charger. Battery charger regulator continuosly supplies 48 V DC bias voltage to the inverter circuit. The inverter circuit is continously converted 48V DC voltage to 220V AC at a frequency of 50 Hz. The inverter system is operated with Sinusoidal Pulse Width Modulation (SPWM) technique. The SPWM signals are applied to the inverter circuit through opto coupler and gate driver unit. The inverter system has filtered output. The DSP based a microcontroller of Microchip dsPIC32MX795F512L is used for the implementation of inverter. The Matlab Simulink software is used to create all of the system simulation. In this thesis analysis, simulation and experimental results were also presented.