Dynamic performance Improvement Of SPWM-VSI

Abstract

Power Quality Improvement has been a serious concern in all fields at all times .Improving the quality of the supply waveform free from any distortion like harmonics or any deviation from the ideal characteristics has let our attention to be devoted to the development of suitable methodologies. Henceforth, we have designed the inverter system which converts the DC into AC voltage which is a pure sine wave, with the voltage and frequency of the standard grid output. The system consists of a full bridge inverter circuit with a passive filter, a feedback circuit using a PI controller and a comparator circuit which gives switching pulses. Our basic intention here is to increase the dynamic performance of the inverter. Suitable modulation techniques and processes have been selected and implemented for the best results. The error in the output signal is minimized for both inductive and capacitive load by the closed loop control scheme that ensures suitable harmonic elimination technique to achieve better performance of the inverter output waveform. The design of LC filter along with suitable change of parameters has been duly studied for better stability and hence evaluated with due simulation. Concerned efforts have been made and will improve further for the betterment of the stability of the system.