Generalized microgrid harmonic compensation strategies using DG unit interfacing converters

This paper discusses harmonic compensation schemes using distributed generation (DG) units. As most DG units are connected to the grid with interfacing converters, the harmonic compensation functions can be realized through flexible control of these converters. Both current controlled and voltage controlled DG systems are considered in this paper. Details on how to implement the harmonic compensation function on those systems are presented. Additionally, the recently proposed hybrid control method (HCM) is also discussed. It shows that the HCM has better performance and is more flexible. Selective simulated and experimental results are provided to verify the feasibility of the HCM approach.