中文摘要：

针对宽输入逆变器双模态工作方式,研究了其重复控制策略。双模态调制使得电路存在降压和升压两种模态,针对这两种模态分别设计控制器增加了控制器设计难度,甚至会导致电路在模态切换时发生输出波形畸变。文中提出了适合宽输入逆变器的双模态统一SPWM调制策略,实现了两种工作模式的平滑切换和统一控制。针对传统PI控制在非线性负载和双模态下控制器设计困难的问题,通过引入重复控制器,基于统一SPWM调制和输入电压解耦策略,详细讨论了重复控制器补偿函数的设计方法;分析表明,合理设计补偿函数,重复控制器可以有效抑制上述周期性扰动。最后设计了一台500 VA宽输入逆变器原理样机,仿真和实验结果验证了双模态重复控制策略的可行性。

英文摘要：

Based on a wide input inverter with dual mode modulation, a close loop method with repetitive controller was proposed. Dual mode modulation makes the inverter generates buck and boost mode. If two controllers are designed for the two modes, the designing process is complex and the output voltage may be distorted in the mode switching process. This paper proposed an unity sine pulse width modulation（SPWM） which means a modulation wave can achieve sliding switching between the two modes. Considering the nonlinear load and dual mode modulation, the parameters of conventional PI controller is hard to get and the performance of the controller is poor. Based on the unity SPWM and the input voltage decoupling, the repetitive controller was adopted, of which the compensation function was designed in detail in this paper. The analysis indicates that if the compensation function is properly designed, the periodic disturbance above mentioned can be repressed by repetitive controller. A prototype rated 500 VA wide input inverter was designed in the lab. Simulation and experiment results verify the feasibility of the dual mode repetitive control strategy.