针对非线性负荷和大功率电力电子设备引发供电系统出现大量的高次谐波,造成电力系统电压、电流波形畸变,电能质量下降,对电力系统的安全、经济运行产生重大危害等问题,根据普查与分析得到煤矿电网谐波的分布情况,做出了煤矿供用电设备的谐波等效电路模型,提出了有源滤波器可有效地抑制电网高次谐波,它将成为今后煤矿供电系统中主要的滤波电器。%The nonlinear load causes massive harmonics of power system,which leads to power system voltage and current waveform distortion,poor quality of power and serious harm to the power system security and economical operation.Through survey and analysis,the distribution situation of coal mine electrical harmonic is obtained.According to this,the harmonic equivalent circuit model of coal mine equipment is listed.The solutions of uses active power filter to suppress high-order harmonics are given.
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