Assessment of Novel Metrics for Different VSI Control Strategies in a Micro-Grid

Interest in the integration of renewable energy with utility network and Distributed Generation (DG) using inverters is on the rise. The parallel operation of inverters must be studied closely for achieving better power quality. Issues in controlling these parallel connected inverters to a micro-grid have been brought to focus in this paper. This paper defines metrics for comparing the various control strategies for grid-connected inverters. Ten such control strategies are taken up and evaluated against the proposed eight metrics. The results of the comparison are presented in this paper.