Improving Controlled Closing to Reduce Transients in HV Transmission Lines and Circuit Breakers

被引:11
作者
Atefi, M. A. [1 ]
Sanaye-Pasand, M. [1 ]
机构
[1] Univ Tehran, Coll Engn, Sch Elect & Comp Engn, Tehran 14395515, Iran
关键词
Closing time deviation; controlled closing; optimum closing instant; rate of decrease of dielectric strength (RDDS); transmission-line switching;
D O I
10.1109/TPWRD.2012.2227831
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
It is widely known that controlled switching of transmission lines reduces the transients in power systems. In this paper, the circuit-breaker (CB) closing time sequence for transmission lines with various configurations is studied and improved. A theoretical analysis based on modal analysis of traveling waves and inverse Laplace transform is used to find the actual zero voltage crossing point of the poles of CB. The transmission-line coupling effect and its effects on controlled closing sequence are also considered. In addition, the minimum requirement for dielectric strength and operating time deviation of the CB is extracted for successful controlled closing. Finally, comprehensive simulation studies are performed to obtain the optimum closing sequence for various lines configurations. It is shown that transmission-line overvoltages are reduced using the proposed controlled closing method.
引用
收藏
页码:733 / 741
页数:9
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