Parallel operation of power electronic cells using serial communication for cell based converter architecture

Abstract

One approach to build a large power inverter system is to use a cellular structure, in which many cells are paralleled to create a single inverter system. This method offers a reliable and flexible solution for a distributed power system. However, we also need to solve problems such as the synchronization of all paralleled cells in frequency, phase and amplitude to guarantee the output power sharing; the output current sharing of the parallel inverter to avoid circulating currents. This paper proposes a method to solve these problems. The simulation results and experimental ones are presented.