研究利用并联有源电力滤波器(shunt active power filter,SAPF)对配电系统在谐振状态下的谐波进行治理。首先对配电系统的谐振原理进行理论分析,得到影响配电系统谐振频率的因素;然后利用谐波电流注入法来检测配电系统的谐振频率,随后提取谐振频率附近的谐波电压作为阻尼电流指令,构建“虚拟电阻”对配电系统进行谐振阻尼;最后通过实验证明了SAPF能够有效治理谐振状态下的配电系统谐波。 The shunt active power filter (shunt active power filter, SAPF) is used to control the harmonics of the distribution system under resonance. Firstly, the theory of resonance of distribution system is theoretically analyzed to get the factors that affect the resonance frequency of distribution system. Then harmonic current injection method is used to detect the resonance frequency of distribution system, and then the harmonic voltage around resonance frequency is extracted as the damping current Order to construct “virtual resistor” to make the resonant damping of power distribution system. Finally, SAPF proved that it can effectively control the harmonic of power distribution system under the resonance condition.