摘要
针对目前一些大工厂高压用户 ,特别是使用直流电机的轧钢企业 ,通过可控硅整流设备整流后 ,由于整流脉冲周期性关断和导通的特性 ,对于 6脉冲整流回路 ,产生 6 n± 1 (n=1 ,2…… )次高次谐波。这些高次谐波电流流向电网 ,会严重的影响电网的质量。如果我们合理的设计选择交流滤波装置 ,就可以很好地滤掉高次谐波电压 ,以减少对电力网的影响 ,提高功率因数 ,降低谐波损耗。
At present a number of high-voltage industrial consumers especially steel rolling mills use D.C. motor with silicon controlled rectifier(SCR) equipment. As a result ,high-order harmonics are formed owing to the specific property of rectification pulse with periodic turn-off and turn-on. For a six-pulse circuit,there are 6n±1(n=1,2....)high-order harmonics.The high-order harmonic currentflowing into power network will greatly influence the quality of electric power.With A.C. filter installation beingreasonably selected, high-order harmonic voltage may be very well eliminated to reduce its influence on power network, and to increase power factor and decreaseharmonics loss.
出处
《电力电容器》
2002年第2期17-20,共4页
Power Capacitors
