荷电状态（state of charge，SoC）均衡是级联H桥电池储能系统中实现多模块能量动态均衡的关键，但传统SoC均衡技术会加剧直流侧暂态电压冲击，为此提出了一种复合SoC均衡与冲击电压抑制的控制策略。首先建立了电池储能SoC与输出功率的数学模型，构建了功率均衡系数将SoC均衡目标融入充放电控制中，提出了自适应调节功率均衡系数控制方法在满足系统额定功率输出的同时实现了SoC均衡。进而针对网侧功率突变引发的直流侧电压波动过大的问题，建立了DC/DC变换器闭环传递函数模型，揭示了关键参数对暂态响应的作用机理，通过基于电容电压前馈的方法实现了电压冲击抑制。最后，仿真和硬件在环实验验证了所提控制策略的优越性能。

State of charge(SoC) balancing is the key to achieve dynamic energy balancing among multiple modules in cascaded H-bridge battery energy storage systems(BESS), but traditional SoC balancing techniques could exacerbate DC-side transient voltage surges. This paper proposes a compound control strategy integrating SoC balancing and voltage surge suppression. Firstly, a mathematical model of battery energy SoC and output power is established, and a power balancing coefficient is constructed to integrate SoC balancing objective into charge and discharge control. An adaptive power balancing coefficient control method is proposed, which achieves SoC balancing while satisfying the rated power output of the system. Furthermore, addressing the issue of excessive DC-side voltage fluctuations caused by sudden changes in grid-side power, a closed-loop transfer function model of the DC/DC converter is established, revealing the mechanism by which key parameters affect transient respons. And voltage surge suppression is achieved through a method based on capacitor voltage feedforward. Finally, simulations and hardware-in-loop experiments verify the superior performance of the proposed control strategy.