电力系统保护与控制2011，Vol.39Issue(14)：86-93,8.
特高压交流系统合闸过电压特点研究
Study on characteristic of switching surge due to closing lines in UHVAC system
计荣荣 1周浩 2易强 1苏菲 1孙可 1陈稼苗3
作者信息
- 1. 浙江大学电气工程学院,浙江,杭州,310027
- 2. 湖州市电力局,浙江,湖州,313000
- 3. 浙江省电力公司,浙江,杭州,310007
- 折叠
摘要
Abstract
Because of the application of high-impedance power supply, long-distance transmission lines and large-capacity power transmission in UHVAC system, the closing overvoltage of UHV has its own features compared with that in other voltage grade. In this paper, based on the systematical study of the UHV overvoltage, the research on those new features is done furtherly. The results show that switching surge due to closing no load lines is generally higher than single-phase reclosing overvoltage in single-circuit lines. But when it comes to long distance and large-capacity transmission, the latter maybe more serious, so it should be paid more attention. When the power supply capacity is smaller and one circuit is still in running in double-circuit lines, the overvoltage of closing another no load lines tends to be high, it ought to be also focused to restrict. For the amplitude of the single-phase reclosing overvoltage in double-circuit lines is closely related with the value of small reactor, the selection of small reactance must consider all kinds of operation modes. In addition, as for UHVAC power system, generally closing resistors is configured to limit overvoltage, and it is better to adopt closing resistors with low resistance values for longer transmission lines and that with high resistance values for shorter transmission line.关键词
特高压交流/合闸过电压/双回线路/运行方式/小电抗/合闸电阻Key words
UHVAC/ closing overvoltage/ double-circuit lines/ operation modes/ small reactance/ closing resistor分类
信息技术与安全科学引用本文复制引用
计荣荣,周浩,易强,苏菲,孙可,陈稼苗..特高压交流系统合闸过电压特点研究[J].电力系统保护与控制,2011,39(14):86-93,8.
