【目的】针对电压源型逆变电源在负载突加突卸过程中存在的输出电压波动问题,为突破其动态响应能力与稳定性不足的核心瓶颈,本文引入电压电流前馈控制方法,旨在有效抑制电压波动并提升系统综合性能。【方法】首先,建立三相三电平全桥逆变电源的精确数学模型。其次,以期望带宽和相角裕度为约束条件,完成传统反馈控制比例积分参数的设计。然后,引入电压电流前馈控制,并利用伯德图与零极点分布分析法,推导出最优前馈系数。最后,通过仿真和试验验证所提方法的有效性。【结果】仿真与试验结果表明,引入前馈控制后,系统在负载突加突卸过程中的输出电压波动显著减小,动态响应速度与运行稳定性均得到有效提升,系统整体性能得到明显改善。【结论】所提电压电流前馈控制设计方法正确可行,物理意义清晰、工程操作性强,为同类逆变电源控制参数的正向设计提供了可借鉴的思路。

[Objective] To address the output voltage fluctuation problem of voltage-source inverters during load step-up and step-down transients and break through the core bottleneck of insufficient dynamic response capability and stability, this paper introduces a voltage-current feedforward control method, aiming to effectively suppress voltage fluctuations and improve the overall system performance. [Methods] Firstly, an accurate mathematical model of the three-phase three-level full-bridge inverter was established. Secondly, the proportional-integral parameters of the traditional feedback control were designed with the expected bandwidth and phase margin as constraints. Then, the voltage-current feedforward control was introduced, and the optimal feedforward coefficient was derived using Bode plots and pole-zero distribution analysis. Finally, the effectiveness of the proposed method was verified through simulations and experiments. [Results] Simulation and experimental results indicated that after introducing the feedforward control, the output voltage fluctuation during load step-up and step-down transients were significantly reduced, and both the dynamic response speed and operational stability were effectively improved, leading to a notable enhancement in the overall system performance. [Conclusion] The proposed voltage-current feedforward control design method is correct and feasible, with clear physical significance and strong engineering operability, providing a referable idea for the forward design of control parameters in similar inverters.

湖北省卓越研究群体项目（2026AFA003）