以单相级联H桥整流器为研究对象，对其控制策略进行了研究。首先在采用双闭环控制策略的基础上，构建了dq前馈解耦模型，并通过二阶广义积分算法改善了虚拟交流分量对系统的影响，实现了网侧电流对电压相位、频率的快速精确追踪。其次，对传统电压平衡控制算法进行了改进，通过对功率平衡关系的定义，将输出电压平方作为控制信号，增强了系统自适应能力，提高了系统在投切载时的动态性能。最后，基于MATLAB/Simulink软件进行仿真，验证了所提策略的正确性和有效性。

The single-phase cascaded H-bridge rectifier is taken as the object of study，and its control strategy is studied. Firstly, based on the double closed-loop control strategy, the dq feed-forward decoupling model is constructed, and the influence of the virtual AC component on the system is improved by the second-order generalized integral algorithm, the fast and accurate tracking of grid-side current to voltage phase and frequency is realized. Secondly, the traditional voltage balancing control algorithm is improved by defining the power balancing relationship, the output voltage square is taken as the control signal to enhance the adaptive ability of the system and improve the dynamic performance of the system during load switching. Finally, simulations based on MATLAB/Simulink software are performed to verify the correctness and effectiveness of the proposed strategy.