电网技术2009，Vol.33Issue(15)：87-92,6.
1 000 kV同塔双回输电线路潜供电流研究
Research on Secondary Arc Current of 1 000 kV Double-Circuit Transmission Lines on the Same Tower
张媛媛 1班连庚 1林集明 1韩彬 1王晓刚 1项祖涛1
作者信息
- 1. 中国电力科学研究院,北京市,海淀区,100192
- 折叠
摘要
Abstract
This paper summarizes the characteristics of 1000 kV double-circuit lines, and the relationship between secondary arc and single-phase reclosing time. And by using EMTP, it calculates and analyzes effect of various factors on secondary arc current during single-phase reclosure of the above lines. The factors include length of line, operation mode, scale of power flow, and value of small reactance on neutral point of shunt reactor. Based on results from calculation and analysis, the following can be concluded: for lines with shunt reactor compensation, when the reclosing time adopted is about 1 s, value of secondary arc current during single-phase reclosure should be less than 35 A;for UHV double-circuit lines, coupling effects of conductors under double-circuit and single-circuit operation modes are different, which makes it difficult to select a suitable value for small reactance on neutral point of shunt reactor;for lines with long length, when they are transmitting heavy power flow, it may be hard for secondary arc to self-extinguish. At present, method of line transposition with reverse-phase sequence commonly adopted cannot completely eliminate coupling between loops. Therefore the method cannot solve the problems related with secondary arc from the root.关键词
同塔双回线路/潜供电流/单相重合闸/潮流/特高压Key words
double-circuit lines on the same tower/secondary arc current/single-phase reclosure/power flow/UHV分类
信息技术与安全科学引用本文复制引用
张媛媛,班连庚,林集明,韩彬,王晓刚,项祖涛..1 000 kV同塔双回输电线路潜供电流研究[J].电网技术,2009,33(15):87-92,6.
