Simulation Study of Hysteresis Current Controlled Single Phase Inverters for PhotoVoltaic Systems with Reduced Harmonics level

摘要

This paper presents model and simulate hysteresis current controlled single phase inverter for a photovoltaic system application and to maintain low THD level and constant switching frequency output from the single phase inverter using Hysteresis current controlling method. Photovoltaic inverters are used to convert the D.C power produced by the solar photovoltaic cell into AC. The proposed hysteresis controller is capable of reducing the total harmonic distortion and to provide constant switching frequency. The mathematical model of Photovoltaic array is developed using the Newton's method. The modeled Photovoltaic array is interfaced with DC-DC boost converter, inverter and load. The performance of the proposed hysteresis current controller of inverter is evaluated through MATLAB-Simulation. A comparative study will be done between the conventional fixed hysteresis current controller for single-phase photovoltaic inverter and proposed adaptive hysteresis current controller for single-phase photovoltaic inverter. The results obtained with the proposed algorithm are compared with those obtained when using conventional fixed hysteresis current controller for single-phase photovoltaic inverter in terms of THD and switching frequency.