A survey of control methods for three-phase inverters in parallel connection

Abstract

This paper critically compares existing control methods for paralleling voltage source converters and applies these to three-phase power inverters. Three existing and one new control topologies are presented, and their properties are discussed in terms of a variety of balanced and unbalanced communication demands, synchronisation and robustness. The domains in which the control takes place are discussed and the boundaries for their application are stated.