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A new control strategy for distributed generation interface converters to compensate microgrid harmonics

Distributed generation has attracted great attention in recent years, thanks to the progress in new-generation technologies and advanced power electronics. The microgrid has been a successful example by integrating various generation sources with the existing power distribution network through power electronic converters. On the other hand, due to rapid penetration of power electronics equipment, many of the loads within microgrid are nonlinear in nature, and the resulting harmonics pollution needs to be addressed. In this paper, a new method for harmonic compensation in microgrid based on the proper control of distributed generation interface converters is proposed. This method utilizes real power-voltage droop, reactive power-frequency boost and harmonic conductance-harmonic Var droop characteristics. It is shown by simulation results that the proposed method is effective for microgrid voltage harmonics compensation.