DESIGN AND PERFORMANCE EVALUATION OF THREE-PHASE INVERTER FOR GRID-CONNECTED PHOTOVOLTAIC SYSTEM

Abstract

: In this paper, a comprehensive study has been explored on the design and performance analysis of a three-phase grid connected inverter employing PWM modulation technique. The obligation for heavy and bulky transformers are completely eliminated by occupying the proposed inverter. The system consists of series and parallel combination of PV arrays, a DC-DC boost-converter (used as MPPT), three-phase inverter generating three-phase output voltages, and utility grid as the load. To analyze the system behavior initially, a is used formula to emulate the output of the PV Array. This simulation defines the output from the hypothetical solar array in order to constitute the input for the simulated Inverter. The basic parameters for the PV array are the insulation and temperature. Secondly, the main system has been virtually created in order to actualize the conversion from DC to AC. The basic components of this are a stabilizer (MPPT or in this case boost-converter) a 6 IGBTs 3-arm bridge, and a low pass LC Filter and grid as load. At third, the control circuit, has been discussed and designed in MATLAB/Simulink interactive software which results sinusoidal output from the inverter. The main theme of this contribution is the architecture of the virtual circuit and the components that are being used in a holistic approach. At last combining the above parts, the voltage, the current of the inverter is taken. The final results are extracted after the system optimization.