有源谐波电阻控制方式的能量流动研究

Research on Active Harmonic Resister to Damping Resonance in Distribution System

在配电网中,为了避免无源滤波器与线路阻抗发生谐振,通常采用小电阻与无源滤波器串联。本文提出了一种基于电力电子变换器的有源谐波电阻(AHR)替代无源电阻。该方法能有效地抑制电压谐振,消除无源电阻的有功损耗。该方法不需要传感器,对于现有电网无功补偿装置的升级改造,具有良好的应用前景。

In power distribution network,resistor is commonly connected in series with the passive filter in order to avoid its resonance with line impedance.An alternative method that A a power electronics converter based Active Harmonic Resister(AHR)replace the passive resistor is proposed in the paper to replace the passive resistor.With the proposed method,potential resonance could be efficiently suppressed,and the active power loss in passive resistor is gone eliminated.Furthermore,because of no more sensors being needed to upgrading the existing reactive power compensation devices in the power supply grid,the proposed method requires no sensor in power supply grid,which could gain good application perspective.