摘要
行波在电网中传输时,行波电流通过变电站母线到达相同电压等级非故障线路的行波称为串入行波。利用串入行波定位故障点,可以有效解决故障线路未安装行波监测终端或监测终端失效情况下的定位问题。但串入行波波头受衰减畸变影响较大,定位精度无法保证。提出一种基于串入式行波故障定位的优化算法,只需采集故障点临近线路的行波数据,结合线路参数列写双端测距方程组求其最小二乘解。仿真和实际案例均表明,算法可以不受行波波速影响,相较于串入行波双端测距法有更高的准确性和可靠性。
When a traveling wave is transmitted in the power grid,the traveling wave current transmitted through the substation bus to the non-faulty line at the same voltage level is called serial-in traveling wave.By using the serial-in traveling wave to locate the fault point,we can solve the locating problem,if no fault wave monitoring terminal is installed or such terminal is ineffective.However,the head of the serial-in traveling wave is so affected by attenuation distortion that location accuracy cannot be guaranteed.An optimization algorithm based on serial-in traveling wave fault location was proposed.All that was needed was to use the traveling wave data collected from the lines adjacent to the fault points as well as the line parameter list to write a double-terminal location formula and find its least squares solution.Simulation and actual case showed that the proposed algorithm could be free from the influence from traveling wave velocity,and had higher accuracy and reliability than the serial-in traveling wave double-terminal location approach.
作者
高昌龙
赵海龙
李佳鑫
刘思驿
李晨宇
Gao Changlong;Zhao Hailong;Li Jiaxin;Liu Siyi;Li Chenyu(College of Electrical Engineering,Northeast Electric Power University,Jilin City Jilin Province 132012,China;Key Laboratory of Physical and Chemical Analysis for the Hainan Power Grid,Haikou Hainan 570311,China;State Grid Liaoning Panjin Power Supply Co.,Panjin Liaoning 124000,China)
出处
《电气自动化》
2020年第4期46-48,68,共4页
Electrical Automation
基金
中国南方电网有限责任公司科技项目基于串入行波的输电线路故障定位技术研究及应用(073000KK52180004)。
关键词
串入行波
行波测距
故障定位
最小二乘
输电线路
serial-in traveling wave
traveling wave fault location
fault location
least squares
power transmission line
