A Novel Method of Fault-Location in Long Power Cable
In the case of malfunction in power cables,it is feasible to obtain the location information of fault point by using reflection phenomenon of traveling waves occurred during transmission due to the fact that the characteristic impedance of fault point changes.However,the energy attenuation and distortion of traveling waves in fault detection of long power cable become the key influence factors of extracting fault reflection signal,which ultimately affect the measurement accuracy.Therefore,by employing the successive optimized high-frequency pulse signal instead of the single pulse signal used in the traditional testing equipment for the long power cable fault-detection,this paper proposes a signal processing method based on digital non-coherent pulses accumulation to calculate the fault location by accumulating reflected signal.The simulated results show that this method can effectively improve the Signal to Noise Ratio (SNR),threshold detection level of the fault signal,and also enhance the detection capability of the fault location in long power cable.
Successive high-frequency pulse signal Pulse accumulation Fault location Long power cable
Jianwei Mi Ximing Men Xiaoli Fang Libin Fan
Key Laboratory of Electronic Equipment Structure Design,Ministry of Education of China, Xidian University, No. 2 South Taibai Road,Xi’an 710071, People’s Republic of China
国际会议
广州
英文
1419-1429
2016-12-15（万方平台首次上网日期，不代表论文的发表时间）