新一代电压平衡控制大功率级联H桥整流器

A new generation of high-power cascade H-bridge rectifier for voltage balancing control

讨论了作为新一代级联式无工频变压器第一部分的级联整流器的控制策略;简化了级联整流器的模型,并且建立了基于单相旋转坐标系的数学模型;提出了一种将合成波形所需的开关状态分解到每个级联单元的直流侧电容电压快速平衡控制策略。仿真结果表明,该控制策略不仅可以使每个级联单元直流侧电容电压平衡控制更精确,而且能更加有效地控制系统有功功率和无功功率。

The paper discussed control strategy of cascade rectifier which was the first part of new generation of cascade non-frequency transformer. It simplified cascade rectifier model, and established a mathematical model based on single-phase rotating coordinate system. It put forward rapid balancing control strategy for DC side capacitor voltage, which decomposed switch states desired by synthesized waveform to each cascade unit. The simulation results show that the control strategy not only can make DC side capacitor voltage balance control of each cascade unit more precise, but also can control active and reactive power more effectively.