电力系统及其自动化学报2018，Vol.30Issue(5)：63-68,6.DOI:10.19635/j.cnki.csu-epsa.000016
半波长线路过电压分析与保护方法
Overvoltage Analysis and Protection Method for Half-wavelength Lines
摘要
Abstract
The transmission distance of half-wavelength lines is comparatively longer,therefore,their electrical charac?teristics are obviously different from those on the existing high-voltage transmission lines.As the position of the maxi?mum voltage locates in the middle of transmission lines,the conventional over-voltage protection cannot satisfy the re?quirement of half-wavelength lines.In this paper,the steady-state voltage characteristics of half-wavelength lines are ana?lyzed in depth,and the influencing factors of over-voltage of half-wavelength lines under steady-state operation are stud?ied.In addition,the relationship between the maximum voltage position and line transmission power is deduced.On this basis,an overvoltage protection method for half-wavelength lines is proposed.EMTP simulations show that this method can accurately calculate the maximum voltage along the transmission line and protect the full length of the line.关键词
半波长输电线路/稳态/过电压/继电保护Key words
half-wavelength transmission line/steady-state/overvoltage/relay protection分类
信息技术与安全科学引用本文复制引用
赵青春,谢华,郭子煊,李斌,朱晓彤..半波长线路过电压分析与保护方法[J].电力系统及其自动化学报,2018,30(5):63-68,6.基金项目
国家电网公司科技资助项目(31966) （31966）
