谐波电流的产生和谐波电流引发的问题的研究

近年来,随着大量用电设备的投入,非线性负载的比例逐渐增大,产生谐波的设备类型及数量均已剧增,并将继续增长。因此,低压配电系统中负载性质发生了深刻的变化。即使在三相正弦激励的作用下,三相线电流也将发生非正弦畸变,产生谐波电流。由此带来了电气设备的安全运行和电气防火等许多新的课题。其中,尤为迫切的是谐波的产生和危害的认识问题,需要设计人员及规章制定人员必须很慎重地考虑。

Research on Causes of Hormonic Currents and Solitating Problem

During these days,as more electric equipments come into using and the ratio of nonlincar load in-creases gradually,both the type and the quantity of equipments that produce harmonic wave have increased enor-mously and will go on increasing consequently,the characters of Low Pressure Distribution System have chang gre-atly.Even if it worked with three-phase sine,three-phase line current would have non-sine aberrance and produce harmonic wave-electricity.As a result,the safe runs of electric equipments,electric fire prerention and many other new subjects come out.What't more,the most urgent problem is the recognization of harmonic wave's appearance and harm which should be taken serious by designers and prmciples-makers.