Influence analysis of converter control mode of photovoltaic and energy storage on weak grid voltage

This research investigates optimal strategies for integrating photovoltaic-storage systems into power networks, specifically examining their impact on voltage stability. It develops mathematical models for both PV and energy storage components, emphasizing the flexible control capabilities of storage under varying operational scenarios. The study focuses on collaborative PV-storage control methods to enhance voltage profiles in weak grids characterized by low short-circuit ratios. Using Matlab/Simulink implement a representative grid-connected system to evaluate performance. Simulation results demonstrate that coordinated storage control ensures uninterrupted photovoltaic operation during grid faults while significantly improving system resilience and stability.