期刊论文

Single-Ended Traveling-Wave-Based Fault Location Algorithm for Hybrid Transmission Line Based on the Full-Waveform

Deng, Feng(df_csust@126.com)

中文

电工技术学报

1000-6753

2018

33

15

3471-3485

10.19595/j.cnki.1000-6753.tces.171642

2016YFB0900600:国家重点研发计划 51737002:国家自然科学基金 51425701:国家自然科学基金 51577013:国家自然科学基金

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架空线-电缆混联线路,由于各段线路行波波速度不一致,初始行波波头和故障点反射波难以辨识,传统的故障定位算法无法适用.提出了基于全波形信息的故障行波时-频域表现形式;基于故障信号的传播特性和折、反射机理,定性分析了区段内故障和相邻区段故障,行波波形时-频域相似性和差异性,揭示了故障行波全波形与故障点位置一一对应的本质;基于故障行波全波形信息,截取一定时间窗行波信号,对其经连续小波变换得到各频带系数进行时间间隔划分,得到面积相等的时频小块,进而建立故障行波时频谱矩阵,利用波形特征匹配技术,实现混联输电线路准确故障定位.该方法具有清晰的物理意义,无需行波模量波速,无需提取...

In transmission lines composed of multi-sectional overhead lines and underground cables, due to the difference between traveling wave velocities in overhead line and underground cable, the traditional traveling wave-based fault location algorithm for uniform transmission line is not suitable. Based on the transmission characteristics and the refraction and reflection mechanism of traveling wave, the traveling waveform similarity and difference in the time-frequency domain between the faults occur within section and at adjacent sections are qual...