A Study of High-Power-Factor Rectifier Circuit to Suppress Source Voltage Harmonics.

在正弦源电压作用下，整流电路的输入电流一般控制为正弦。由于整流电路输入电流的均方根值最小，且不会产生谐波，因此是最佳状态。本文针对整流电路和配电系统的优点，讨论了在电源电压失真情况下整流电路的输入电流波形，这对于防止设备发生谐波事故具有重要意义。研究结果表明：对于整流电路，瞬时值与接收端电压成正比的输入电流波形是最理想的，因为可以获得单位有效功率因数；对于配电系统，输入电流波形是理想的，它包含与接收端电压谐波同相的较大的谐波分量，因为获得了电源电压和电流的谐波抑制效果；输入电流波形的瞬时值与接收端电压成比例，可以抑制接收端的电压谐波，实现整流电路的单位有效功率因数。此外，与接收端电压的THD相比，输入电流波形具有更显著的谐波抑制效果，仿真和实验验证了所提出的电流波形的有效性。

Under the sinusoidal source voltage, the input current of the rectifier circuit is generally controlled to be sinusoidal. It is the best condition because the rms value of the input current of the rectifier circuit is minimum and the no harmonics are produced.In this research, the input current waveform of the rectifier circuit under the distorted source voltage is discussed for the merits of the rectifier circuit and power distribution system, because it is important for protecting the equipment from the accident by harmonics. The following results are obtained.For rectifier circuit, the input current waveform whose instantaneous value is in proportion to that of the receiving end voltage is most desirable because unity effective power factor is obtained.For power distribution system, the input current waveform, which includes larger harmonic components in phase with the receiving end voltage harmonics, is desirable because the harmonic suppression effect of the source voltage and current is obtained.The input current waveform whose instantaneous value is in proportion to that of the receiving end voltage can suppress the voltage harmonics at the receiving end and realize unity effective power factor of the rectifier circuit. Moreover, the input current waveform which has twice as much compared with the THD of the receiving end voltage has more significant harmonic suppression effect.The effectiveness of the proposed current waveform has been confirmed by simulations and experiments.