New current feed back control method for solar energy inverter using digital signal processor

A solar energy inverter for photovoltaic power systems connected to electric utility lines has been developed. It is a power conditioner with a high-frequency transformer link for residential use at a power level of 3 kW. This paper describes a new synchronous current feedback control method using a digital signal processor (DSP). An adaptive finite impulse response filter is introduced into the control scheme. This paper also suggests a new method for detecting power outages. It gives frequent changes to the frequency of the inverter output voltage using a distortion of the inverter output current.