适用于电压型变流器的新型间接电流控制方法

Novel Indirect Current Control Method Applied for Voltage-Source Converter

为了克服变流器传统的相位幅值控制方法的不足,更加可靠、有效地实现功率因数校正,改善电流波形,推导出一种只需检测直流输出电压便可适用于电压源型双向脉宽调制PWM变流器的新型控制方法。该方法依据传统的相位幅值控制原理,对PWM整流器输入电流进行开环控制,开关机理清晰,控制简单,所需成本低,有一定的实用价值。系统仿真和实验验证了该方法的有效性。

In order to realize the power factor rectification and improve the current waveform more reliably and effectively,this paper proposes a novel control method that only needs to detect DC-side output voltage for bio-direction voltage-source converter based on the conventional phase and magnitude control principle. This method not only has simple and clear control principle ,but also lowers the cost of control system. On the basis of theoretical derivation ,this paper establishes the simulation model ,and then through experiments the results of simulation are verified. Thus ,the feasibility and correctness of the proposed method are proved.