Power Quality Improvement Strategy of Hybrid Control Grid-connected System

The station area with high proportion of new energy access generally contains both grid-following inverter and grid-forming inverter. When the local load exhibits nonlinear and unbalanced characteristics, the grid-connected power quality of the traditional hybrid control system with grid-following and grid-forming cannot meet the grid-connected requirements. Aiming at this problem, this paper proposes a power quality improvement strategy for hybrid control grid-connected system, which can effectively suppress three-phase imbalance and harmonic distortion, and improve the grid-connected power quality of the system. Finally, the effectiveness of the proposed control strategy is verified by simulation.