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介绍一种基于脉冲宽度调制（ＰＷＭ）交流控制技术的新型静止移相器。对单桥ＰＷＭ移相器在１个开关周期中的３种工作模式进行了理论分析，推导了旁路电容及吸收电阻的参数设计公式；提出采用多桥叠加结构的交流控制器抑制大容量ＰＷＭ移相器的自身谐波发生量、降低装置开关频率及开关损耗；推导得出了多桥ＰＷＭ交流控制器的电压转移函数以及多桥移相器的线路注入电压表达式；通过计算机仿真分析及物理模型实验，验证了理论推导结果的正确性。
A novel static phase shifter based on pulse width modulation (PWM) AC control technology is introduced. Three kinds of operating modes of single-bridge PWM phase shifter in one switching cycle are theoretically analyzed, and the parameter design formulas of the bypass capacitor and the absorption resistor are derived. The AC controller with multi-bridge superposition structure is proposed to suppress the large-capacity PWM Phase shifter’s own harmonic generation, reduce the switching frequency and switching loss of the device; derive voltage transfer function of multi-bridge PWM AC controller and multi-bridge phase shifter line injection voltage expression; through computer simulation analysis and The physical model experiment verifies the correctness of the theoretical derivation.