Redundant parallel control for current regulated inverters with instantaneous current sharing

A distributed control for redundant parallel inverters, based on current regulation, with instantaneous current sharing is proposed. The voltage and current references are the only two shared bus signals among the modules, which generated from all the individual inverters in parallel operation. It is proved mathematically that the parallel system, without extra current deviation control loop, operates with the equivalent transfer function (therefore the same control property) of the individuals and presents load balance performance as good as master-slave method. Simulated and experimental results are given to verify the analysis.