摘要
为了减小行波波速对故障测距的影响,提高行波测距的精度,根据输电线路波动方程,分析了输电线路行波波速与输电线路分布参数的对应关系,并进一步阐述线路实际运行状态(导线运行温度、周围环境温湿度以及大气压强等)与波速的对应关系,为修正输电线路实际运行状态下的行波波速提供了依据。分析结果表明,导线实际运行状态对行波波速的影响并不显著,以100km计,单个因素引起的测距误差最大只有39.067m。
To diminish the traveling wave velocity＇s influence on fault location and enhance the accuracy of fault location,the relationship between the transmission line distributed parameter and the traveling wave velocity is analyzed on the basis of the equations of wave in transmission line.Moreover,it is asserted that the substantial factors are the conductor temperature,environmental temperature and humidity,atmospheric pressure.This can be the guideline for the correction of the traveling wave velocity under the real operating state of the overhead line.The results indicate that the operating state of transmission line influences the traveling wave velocity slghtly,and the maximum error caused by solitary factor is just 39.067 m over a 100 km-long lines.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2014年第9期12-16,29,共6页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(50977057)
国家高技术研究发展计划(863计划)资助项目(SS2012AA050803)
关键词
输电线路实际运行状态
故障测距
行波波速变化
导线运行温度
环境温湿度
大气压强
real operating state of overhead transmission line
fault location
variance of traveling wave velocity
conductor temperature
environmental temperature and humidity
atmospheric pressure
