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6n+1(n=-1,1,2……)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。同时可以大大的为企业减少资金。采用这种方法设计的滤波器装置已在几家企业变电站应用,投资少、运行收效良好。
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 harmonic is formed due to the specific property of rectification pulse with periodic turn-off and turn - on. For a six - pulse circuit, there is6n±1(n=1,2,…) high - order harmonic. The high - order harmonic current flowing into power network will greatly influence the quality of electric power. With AC filter installation being reasonably selected, high - order harmonic voltage may be very well eliminated to reduce its influence on power network, and to increase power factor and decrease harmonic loss.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2003年第S1期63-64,68,共3页
Power System Protection and Control
关键词
高次谐波
交流滤波装置
high - order harmonic
AC filter installation
