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Research on the control technique of high power three-level PWM rectifier with IGCTs

机译：IGCTs大功率三电平PWM整流器控制技术研究

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摘要

This paper is based on the high power three-level back-to-back converter system with IGCTs as its application platform. Three-phase voltage source rectifier (VSR) space vector PWM (SVPWM) control system using feedforward decoupling control strategy is built in the software of PSIM. When this SVPWM rectifier is in practical control, problems of harmonics and neutral point voltage deviation, as well as starting impulse current occur. After detailed analysis, solutions are provided respectively to each problem. Then a new PWM control method is designed to improve the situation overall. That is to say, this method can effectively eliminate even-order harmonics, balance neutral point voltage and lower the starting impulse current. So the system has a better performance which is proved by PSIM simulations and experimental waveforms.
机译：本文基于以IGCT为应用平台的高功率三电平背靠背转换器系统。在PSIM软件中建立了采用前馈去耦控制策略的三相电压源整流器（VSR）空间矢量PWM（SVPWM）控制系统。当该SVPWM整流器投入实际控制时，会出现谐波和中性点电压偏差以及启动脉冲电流的问题。经过详细分析，分别为每个问题提供了解决方案。然后设计了一种新的PWM控制方法来改善整体情况。也就是说，该方法可以有效地消除偶次谐波，平衡中性点电压并降低启动脉冲电流。因此，该系统具有更好的性能，这已通过PSIM仿真和实验波形证明。

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