水厂泵房高次谐波的危害及预防措施

Harm and Preventive Measures of High-order Harmonics in Pump Room of Water Treatment Plant

工业电网中有许多高次谐波,在变频器多的工厂中,由于变频器整流逆变的特性,更易产生高次谐波,而高次谐波会使电网中的电流和电压波形发生畸变,功率因数下降,电能的无用功增多,还会降低设备使用寿命,更易使控制系统产生误动作。通过阐述高次谐波产生的原因,分析其危害,并提出相应的预防措施。

There are many higher-order harmonics in the industrial power grid.In factories with many frequency converters,due to the characteristics of frequency converter rectification and inversion,it is easier to generate high-order harmonics.Higher-order harmonics will cause the current and voltage waveforms in the power grid to be distorted,reduce power factor,increase the reactive power,reduce the service life of the equipment,and they are easier to cause the control system to malfunction.This paper expounds the causes of high-order harmonic generation,analyzes its harm,and puts forward corresponding preventive measures.