【摘要】 针对储能变流器(power conversion system, PCS)在充放电模式切换过程中存在的电压波动大、动态响应慢及谐波含量较高等问题，提出一种基于模糊PI的PCS控制策略。通过将模糊逻辑与传统PI控制相结合，构建具有参数自整定功能的复合控制器，有效解决了传统PI控制在工况突变时超调量过大、调节时间长的问题。通过MATLAB/Simulink搭建模型并进行仿真，实验结果表明：相较于传统PI控制，所提方法将模式切换过程中的直流母线电压超调量降低50%以上，功率跟踪响应时间得到有效缩短，同时网侧电流总谐波畸变率(total harmonic distortion, THD)从0.70%下降至0.28%。该控制策略显著提升了PCS在充放电切换过程中的动态性能与电能质量，为储能系统安全稳定运行提供了有效的控制方法。更多还原

【Abstract】 To address issues of voltage fluctuation, slow dynamic response, and high harmonic distortion during charge-discharge mode switching in power conversion system(PCS), a fuzzy PI-based PCS control strategy is proposed. By combining fuzzy logic with conventional PI control, a composite controller with parameter self-tuning is designed to mitigate excessive overshoot and long settling time under sudden load changes. Simulations in MATLAB/Simulink show that compared with traditional PI control, the proposed method reduces DC bus voltage overshoot by over 50%, shortens power tracking response time, and lowers grid-side current THD from 0.70% to 0.28%. The strategy enhances both dynamic performance and power quality of PCS during mode transitions, offering a reliable control solution for the stable operation of energy storage systems.更多还原