特高压同塔双回线路故障测距算法  

Fault location algorithm for double-circuit UHV transmission lines on same tower

作　　者：王艳[1] 郝良霞 徐玉琴[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力自动化设备》2016年第4期7-13,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51307059)~~

摘　　要：提出一种基于双曲余弦函数幅值特性的特高压同塔双回线路故障测距新方法。采用半波傅氏窄带滤波算法提取特高压同塔双回线路两端电气基波分量,利用六序分量法对其进行解耦,在同正序基波分量基础上构造一双曲余弦测距函数,利用所取参考点与故障点相匹配时测距函数幅值最大这一特征进行故障测距。理论分析和仿真测试表明,所提方法不受系统阻抗、故障点过渡电阻和线路分布电容电流等因素影响,测距精度高,计算速度快,能够满足现场应用的要求。A fault location method based on the amplitude characteristics of hyperbolic cosine function is presented for the double-circuit UHV transmission lines on same tower. The half-wave Fourier narrow-band filtering algorithm is applied to extract the electrical fundamental components of both ends and the six-sequence component method is then applied to decouple them. A hyperbolic cosine fault locating function is constructed based on the homotopic positive-sequence fundamental components and the reference point producing the maximum amplitude of fault locating function is taken as the fault location. Theoretical analysis and simulative test prove that,immune to the system impedance,fault point transition resistance,line distributed capacitive current and other factors,the method has high fault locating accuracy and quick calculating speed,meeting the requirements of site applications.

关 键 词：特高压输电 交流输电 同塔双回线路 故障测距 窄带滤波 测距函数 

分 类 号：TM723[电气工程—电力系统及自动化]