CAJ | 학술논문

深入研究了在主回路开关管发生断路故障后,电压型PWM整流器的故障特征：交流网侧故障电流和电压的波形畸变现象,并将之与常规的SVPWM逆变器进行了对比分析。文中通过对PWM整流器发生故障后的工作过程的分析,深入研究了电压型PWM整流器的双闭环控制方法对其上述故障特征的影响,继而对PWM整流器的直流输出功率以及交流电感量对其电流畸变的影响情况进行了分析研究。最后分析了PWM整流器特有的故障特征对其故障诊断过程的影响,并介绍了一种应用于大功率PWM整流器的主回路断路元件定位方法。
심입연구료재주회로개관관발생단로고장후,전압형PWM정류기적고장특정：교류망측고장전류화전압적파형기변현상,병장지여상규적SVPWM역변기진행료대비분석。문중통과대PWM정류기발생고장후적공작과정적분석,심입연구료전압형PWM정류기적쌍폐배공제방법대기상술고장특정적영향,계이대PWM정류기적직류수출공솔이급교류전감량대기전류기변적영향정황진행료분석연구。최후분석료PWM정류기특유적고장특정대기고장진단과정적영향,병개소료일충응용우대공솔PWM정류기적주회로단로원건정위방법。
This paper presents a deep research on the AC fault current and voltage distortion of voltage-source PWM rectifier after the breakdown fault of its power devices. The result from the research is also compared with that of conventional SVPWM inverter. Based on the conclusions derived from the performance analysis of PWM rectifier after the fault, this paper comes up with the affects from its double-loop control scheme on the current and voltage distortion, as well as from different DC output currents and AC inductance, together with their contribution to the distortion. Finally, the fault characteristics peculiar to large-capacity PWM rectifier is analyzed, and then a fault device localization approach for it is introduced.