Research on a kind of multiple control strategy for parallel connected inverters

A kind of multiple control strategy based on repetitive control is applied in this paper. The inverter transient response characteristic is improved and harmonic distortion of output voltage wave is reduced by this strategy. A distributed control scheme with instantaneous current sharing is developed for redundant parallel inverter power supply system. Current sharing based upon the average current method is realized by using a shared bus to connect all the parallel modules without extra control modules. The experiment results are achieved and the important waveforms are discussed.