电网技术2011，Vol.35Issue(1)：18-25,8.
超/特高压交流输电线路断路器合闸电阻的适用性研究
Study on Applicability of Circuit Breaker Closing Resistance in EHV and UHV AC Systems
摘要
Abstract
Closing resistors can effectively restrict switching surges due to closing no load transmission lines of EHV and/or UHV AC power grids. In view of complex structure and high cost of closing resistors, it is worthy to research that whether there is the necessity to adopt this measure or not. By use of software simulation, the applicability of closing resistors in EHV and UHV AC power grids under different conditions is researched. Research results show that for 500 kV AC power grid the closing resistor can usually be not equipped while the length of transmission line is short than 100 km; whether closing resistor has to be equipped or not should be determined according to the analysis results based on concrete conditions while the length of transmission line is within the range from 100 km to 200 km; the closing resistor should be adopted in general while the length of transmission line is within the range from 200 km to 400 km, however, the way of configuring two or three sets of metal oxide attester (MOA) along the transmission line to substitute for closing resistors could be adopted; the closing resistors should be still equipped to restrict switching surge while the length of transmission line is within the range from 400 km to 600 km. As for 1000 kV AC power grid, it is hardly to restrict the switching surge due to closing no-load line to the specified value given by the code even though the length of transmission line is 100 km when closing resistors are not adopted. Thus, in general closing resistors should be configured in 1000 kV transmission lines, 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
超高压/特高压/合空线过电压/合闸电阻/避雷器Key words
extra high voltage (EHV)/ ultra high voltage (UHV)/ switching surge due to closing no-load line/ closing resistor/ metal oxide arrester (MOA)分类
信息技术与安全科学引用本文复制引用
计荣荣,易强,苏菲,孙可,陈稼苗,周浩..超/特高压交流输电线路断路器合闸电阻的适用性研究[J].电网技术,2011,35(1):18-25,8.基金项目
国家重点基础研究发展计划项目(973项目)(2011CB209405). （973项目）
