某低压台区3次谐波机理分析及治理

Analysis and Governance on 3th Harmonic of Low Voltage Distric

针对某低压台区3次谐波超标问题,进行电能质量测试。在实测数据的基础上,通过负序和谐波电压电流测试数据估算系统阻抗,零序电压电流测试数据估算零序阻抗,将估算结果进行对比和分析,说明该台区3次谐波产生的机理,并给出相应的解决方案。

Aiming at the overproof problem of 3th harmonic in a low voltage area,power quality of the low voltage area was tested. On the basis of the measured data,the system impedance was estimated by the voltages and currents of negative sequence and harmonic,and the zero sequence system impedance was estimated by the zero sequence voltages and currents,and then the estimated results were compared and analyzed,showing the mechanism of 3th harmonic. At last the solutions were given.