Power Cable Defects Location Based on Improved Time-frequency Domain Reflectometry

被引：0
|
作者：
Wang Y. [1 ]
Zhou K. [1 ]
Wang X. [2 ]
Rao X. [1 ]
Li R. [1 ]
Liang Z. [1 ]
Gong W. [1 ]
机构：
[1] School of Electrical Engineering, Sichuan University, Chengdu
[2] Wanzhou Power Supply Branch, State Grid Chongqing Electric Power Company, Wanzhou District, Chongqing
来源：
Gong, Wei (gwei349@163.com) | 1600年 / Chinese Society for Electrical Engineering卷 / 41期
基金：
中国国家自然科学基金;
关键词：
Affine transformation; Cable defects location; Cross term; Time-frequency domain reflectometry; Time-frequnecy correlation; Wigner-Ville distribution;
D O I：
10.13334/j.0258-8013.pcsee.202020
中图分类号：
学科分类号：
摘要：
Power cables have been widely used in urban power distribution systems, and cable defects location has become a problem of concern to many scholars. For the traditional time-frequency domain reflectometry (TFDR) there are cross-term interference and other issues. This paper proposed an improved time-frequency domain reflectometry. The method selected a specific linear frequency modulation (LFM) reference signal and obtained a Wigner-Ville distribution (WVD) of the reflected signal to analyze the time-frequency characteristics. However, there was cross-item interference in the WVD, so a new cross-item suppression method was proposed in this paper. By analyzing the characteristic differences between the self-item and cross-item of the signal time-frequency distribution, the cross-item interference was eliminated without affecting the signal resolution by affine transformation (AT) and other signal processing methods, and the defects location were precisely determined by the time-frequency cross-correlation function of the signal. In this paper, the 10kV cross-linked polyethylene (XLPE) cable was simulated and analyzed, and the 105m XLPE cable with defects and the 500m XLPE cable with joints were experimented. The simulation and experimental results show that the proposed method is more accurate than the conventional method and has better robustness. © 2021 Chin. Soc. for Elec. Eng.
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页码：2584 / 2593
页数：9
相关论文
共 26 条
  • [1] LUO Junhua, QIU Yucang, YANG Liming, Operation fault analysis of CLPE power cable above 10kV, High Voltage Engineering, 29, 6, pp. 14-16, (2003)
  • [2] LIN Siyan, ZHOU Kai, YIN You, Et al., Diagnosing method for water tree aging on XLPE CABLE BASED ON CONTinuous PDC test method, Proceedings of the CSEE, 40, 20, pp. 6764-6773, (2020)
  • [3] ZHANG Qiaofeng, ZHOU Kai, LI Kangle, Et al., Growth characteristics of water trees in XLPE under temperature cycling conditions, High Voltage Engineering, 46, 12, pp. 4241-4248, (2020)
  • [4] SHIN D S, CHO H D, PARK W S, Et al., Extraction of propagation constant of XLPE cable using time-domain transmission, IEEE Transactions on Instrumentation and Measurement, 63, 12, pp. 2855-2862, (2014)
  • [5] PANG Fubing, CUI Yu, WU Yi, A signal attenuation calculation method of high frequency protection for hybrid power lines, Power System Technology, 43, 6, pp. 2187-2194, (2019)
  • [6] WANG Xianjing, ZHOU Kai, XIE Ming, Et al., Research on Partial Discharge Source Location for Power Cables Based on Time Reversal Phase Method, Power System Technology, 44, 2, pp. 783-790, (2020)
  • [7] LI Rong, ZHOU Kai, WAN Hang, Et al., Study on moisture location of cable joints in medium voltage distribution grid based on frequency domain reflection method, Power System Technology, pp. 1-8
  • [8] FURSE C M, KAFAL M, RAZZAGHI R, Et al., Fault Diagnosis for Electrical Systems and Power Networks: A Review, IEEE Sensors Journal, (2020)
  • [9] SHIN Y, POWERS E J, CHOE T, Et al., Application of time-frequency domain reflectometry for detection and localization of a fault on a coaxial cable, IEEE Transactions on Instrumentation and Measurement, 54, 6, pp. 2493-2500, (2005)
  • [10] WU Y, LI X., Elimination of cross-terms in the Wigner-Ville distribution of multi-component LFM signals, IET Signal Processing, 11, 6, pp. 657-662, (2017)
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