输电线路单相接地故障单端测距算法设计  

Design of single-terminal location algorithm for single-phase earth fault in transmission lines

作　　者：白挺玮 于重 孙倩琳 蔡成 BAI Ting-wei;YU Zhong;SUN Qian-lin;CAI Cheng(Liaoning Electric Energy Development Co.,Ltd.,Shenyang 110176,China;Liaoning Power Development Group Supervision Co.,Ltd.,Shenyang 110000,China)

机构地区：[1]辽宁电能发展股份有限公司,沈阳110176 [2]辽宁电力能源发展集团监理有限公司,沈阳110000

出　　处：《信息技术》2024年第12期179-184,共6页Information Technology

摘　　要：受线路复杂耦合的影响,输电线路故障分析结果容易产生较大的测距误差。针对此问题,提出输电线路单相接地故障单端测距算法设计。根据行波的反射与折射情况,测定初始行波从故障点到达母线的距离,判断线路发生单相接地故障的具体位置;应用电路理论推导故障点参数分布情况,建立故障点电气参数频域微分方程;选择相模变换解耦模型完成分量转换,实现单相接地故障的单端测距算法设计。实验结果表明:所设计新算法可以实现故障点距离精准测算,测距误差不超过0.02%,能够有效应用在不同的接地故障模式中。Due to the complex coupling of transmission lines,the fault analysis results of transmission lines are prone to significant ranging errors.In this regard,a single-terminal location algorithm design based on single-phase earth fault of transmission lines is proposed.Based on the reflection and refraction of the traveling wave,the distance from the initial traveling wave to the busbar from the fault point is determined,and the specific location of the single-phase grounding fault on the line is identified.The circuit theory is applied to derive the distribution of fault point parameters and frequency domain differential equations for electrical parameters at fault points is established.A phase mode transformation decoupling model is selected to complete component conversion and design a single terminal location algorithm for single-phase earth faults.The results show that the designed new algorithm can accurately calculate the distance between fault points,with a ranging error of no more than 0.02%,and can be effectively applied in different earth fault modes.

关 键 词：单相接地故障 单端测距 相模变换 初始行波 相似变换 

分 类 号：TM773[电气工程—电力系统及自动化]