Seamless transfer strategy with outer current loop for three phase inverter in distributed generation

Abstract

This paper presents a control strategy for three phase inverter to transfer between grid-tied and islanding mode in distributed generation. It is with an inner load voltage loop and an outer grid current loop. During the transition, the regulators are not changed, as the limiters are of effect. As a result, the load voltage is very smooth during the transfer, and the realization is very simple.