摘要
针对10kV客运专线电力电缆贯通线故障定位问题,参考客运专线实际设计图纸和现场运行数据,借助仿真软件Simulink建立了10kV客运专线贯通线仿真模型。通过采用C型行波测距法,设计了一个中心频率、持续时间和频带宽度可调的高频注入信号来进行长电缆贯通线路的故障测距。并从时频域联合分析的角度,通过求取所获得波形的互相关参数简化了故障测距问题。仿真结果证明,这种方法对较长距离的电力贯通线定位是有效的,利用中心频率的偏移对信号波形失真产生的时间延迟进行补偿,可以在一定程度上提高故障测距的精度。
Aiming at the problem of fault location in power cable continuous lines of the 10 kV passenger dedicated line, this paper establishes the simulation model of 10 kV power cable continuous lines with Simulink, according to actual design drawings and field operating data of the passenger dedicated line. This paper designs a high-frequency signal with adjustable center frequency, duration and frequency band to conduct fault location for the long power cable continuous lines based on C-type traveling wave. From the perspective of time-frequency analysis, it simplifies the problem of fault location on the long power cable by obtaining cross-correlation parameters of fault waves. The simulation results show that the algorithm is effective for the fault location of the power continuous line with long distance. And it can improve the accuracy of fault location to a certain degree by using center frequency shift to compensate the time delay produced by signal waveform distortion. This work is supported by National Natural Science Foundation of China （No. 50877068）.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第14期51-57,共7页
Power System Protection and Control
基金
国家自然科学基金(50877068)
教育部博士点基金(200806130004)~~
关键词
电力电缆贯通线
高频信号
C型行波
故障测距时频分析
power cable continuous lines
high-frequency signal
C-type traveling wave
fault location time-frequency analysis
