Using inverter-based renewable generators to improve the grid power quality—A review

With the increasing penetration of renewable power in the grid, renewable generators are expected to play more important roles rather than merely working as active power sources. Considering the high controllability and considerable idle capacity of the inverter-based renewable generators, various auxiliary functions for them have been studied to benefit the grid. Among these auxiliary functions, the grid power quality improvement is very promising. This paper presents a review of the emerging control strategies for inverter-based renewable generators to improve grid power quality. The related papers are classified with different power quality issues and technical routes, and a comprehensive comparison is presented. The future trends of this research area are also discussed.