基于传输线理论电力高频脉冲在电缆上的传输与反射研究

针对电力高频脉冲在电缆上传输过程引起产生谐波等问题,基于传输线理论,在建立高频脉冲作用下电缆分布参数模型的基础上,探讨在高频脉冲驱动下长电缆传输产生的负面效应问题.论文结合三相交—直—交PWM变换电路带电动机负载状态下,较详细地分析讨论了PWM脉冲波在电缆上的传输和反射过程,研究电机端过电压的产生机理,分析引起电机定子绕组绝缘过早损坏,供电电源电压产生谐波的原因,并通过实验验证了理论分析的有效性.

Transmission and reflection of high-frequency power pulse in cable based on transmission theory

For the problem of harmonic generation caused by power high frequency pulse during transmission, based on the transmission line theory, cable distributed parameter model under the high frequency was established and negative effects caused by long cable transmission were analyzed. Be tied of the states of three-phase AC-DC-AC PWM inverter with motor, not only the article discussed the transmission and reflectance processions of impulse wave over the cable in detail, but also researched the production principle of motor over voltage. In addition, it analyzed the reasons of premature failure of the stator winding insulations and why the supply generated harmonic. The theory of this method has been verified by the experiment.