摘要
输电线路故障诊断是保证供电可靠性的关键技术,但国内还没有直接的监测技术能实现输电线路故障原因辨识。为此,介绍了架空输电线路跳闸故障智能诊断系统及其在广东电网中的应用。诊断系统的功能主要包括输电线路故障性质识别及故障精确定位,其中故障性质识别包括雷击和非雷击故障识别,雷击故障识别包括绕击和反击识别;故障精确定位是基于分布式行波监测技术的定位方法,该方法利用在线测量行波电流传播的等效波速来减小弧垂、波前畸变等因素引起的误差。在理论研究的基础上,开发了输电线路故障智能诊断系统,在广东电网17回输电线路挂网运行,通过与变电站故障录波装置、电网雷电定位系统的诊断功能对比,分析了该系统在故障原因识别和定位方面的优越性。实际运行结果表明,输电故障智能诊断系统在故障区间定位、精确定位、指导故障点查找、故障定性和防雷分析方面发挥了重要作用。
The intelligent diagnosis of transmission line,including identification of nature of failure and accurate positioning of faults on overhead transmission line,is described,in which identification of nature of failure includes identification of failure by lightning and non-lightning,and accurate positioning of fault is based on a positioning method of distributed traveling wave monitoring technology.The method adopts the equivalent velocity of current wave by on-line measurement to reduce the sag,distortion of the first wave,and other errors.Basing on the theory,we developed a transmission line fault intelligent diagnosis system,which was applied to the Guangdong Power Grid.By comparing the substation fault recorder and lightning location system fault diagnosis,we analyzed superiority of the system in terms of the fault cause identification and fault location.The actual operation shows that fault diagnosis system plays an important role in fault interval orientation,accurate positioning,fault point search,fault cause guidance and lightning protection analysis.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2012年第8期1965-1972,共8页
High Voltage Engineering
基金
中国南方电网公司重点科技项目(DK0010DK0008)~~
关键词
架空输电线路
故障诊断
精确定位
线路跳闸
分布式行波监测
雷击故障
非雷击故障
overhead transmission line
fault diagnosis
accurate positioning
line trip-out
distributed traveling wave monitoring
lightning strike fault
non lightning strike fault
