南方电网技术2017，Vol.11Issue(12)：62-67,6.DOI:10.13648/j.cnki.issn1674-0629.2017.12.010
220kV输电线路终端避雷器对断路器断口保护效果的研究
Study on the Protective Effect of Terminal Arrester of 220 kV Transmission Line on the Circuit Breaker Fracture
谢海 1黄金 1孙春日 1刘荣洲 1梁兆庭 1李旭横1
作者信息
- 1. 广西电网有限责任公司贺州供电局,广西贺州542899
- 折叠
摘要
Abstract
After a 220 kV transmission line is equipped with a line type terminal arrester,breaker fracture breakdown fault of 220 kV line circuit breaker is still frequent.This paper gives a detailed analysis of 220 kV circuit breaker fracture breakdown fault,and uses the theory of the steepness of the lightning wave to deduce the allowable electrical distance calculation formula between the line type or substation typr arrester and the circuit breaker fracture.When a 220 kV line is strucked by lightning,the following two conclusions can be drawn through calculation:1) the overvoltage value of circuit breaker fracture when line type arrester is adopted on the 220 kV transmission line is 70％ higher than that substation type arrester is adopted;2) the withstand voltage of circuit breaker fracture line type arrester is adopted is 0.92 times of its overvoltage,while the fracture withstand voltage of circuit breaker when substation type ar rester is adopted is 1.56 times of its overvoltage.This shows that there is no effective protection of 220 kV line type arrester on circuit breaker fracture,while substation arrester can effectively protect the fracture of circuit breaker.This paper provides basis for the modification of anti-accident measures and the modification of technical standard.关键词
雷击过电压/断口耐压/线路型和变电站型避雷器/允许电气距离/绝缘配合Key words
lightning overvoltage/fracture withstand voltage/line type and substation type arrester/allowable electrical distance/insulation coordination分类
信息技术与安全科学引用本文复制引用
谢海,黄金,孙春日,刘荣洲,梁兆庭,李旭横..220kV输电线路终端避雷器对断路器断口保护效果的研究[J].南方电网技术,2017,11(12):62-67,6.
