VOLTAGE REGULATION OF A THREE PHASE PWM INVERTER OF A STANDALONE DG UNIT USING FUZZY CONTROLLER

Abstract— This paper provides a control scheme for regulating the voltage of the three phase PWM inverter of a standalone DG unit. The standalone and grid connected operations of DG helps in generation by improving power quality and reliability. This control scheme regulates the voltage effectively in the presence of system uncertainties without much reduction when compared to the supply voltage. Fuzzy controller is used to regulate the voltage and also controls the current and harmonics. The proposed controller works effectively even in the existence of non linear load. The proposed system further lowers the THD value to give better performance.