Research on control strategy of industrial and commercial power convert system based on improved modulation algorithm

This paper addresses the challenges of power fluctuations due to the integration of renewable energy sources by proposing a novel control strategy for commercial energy storage systems. Specifically, it introduces a commercial power convert system model that utilizes the sine pulse width modulation (SPWM) algorithm combined with zero-sequence voltage injection. The paper details the method for implementing this zero-sequence voltage modulation algorithm and integrates a control strategy for grid connection and disconnection. The effectiveness of the proposed control strategy is evaluated through simulation and experimental comparisons with industrial and commercial power convert systems. Results demonstrate that the improved modulation algorithms and control strategies are both correct and effective in managing power fluctuations and ensuring stable grid operation.