Localization Method for Multiple Partial Discharge Sources in Air-insulated Substation by Using Plane Intersection Method

被引：0
|
作者：
Zhu M. [1 ]
Liu Q. [1 ]
Wang Y. [1 ]
Deng J. [1 ]
Zhang G. [1 ]
Guo A. [2 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] Electric Power Research Institute, State Grid Shaanxi Electric Power Company, Xi'an
来源：
Zhang, Guanjun (gjzhang@mail.xjtu.edu.cn) | 2018年 / Science Press卷 / 44期
基金：
中国国家自然科学基金;
关键词：
Air-insulated substation; Localization; Partial discharge; Plane intersection method; Signal separation; Ultra-high frequency method;
D O I：
10.13336/j.1003-6520.hve.20180828026
中图分类号：
学科分类号：
摘要：
Recently, the ultra-high-frequency-based antenna array has been applied to partial discharge (PD) detection and localization in air-insulated substations (AIS). The range of PD source is generally estimated with high inaccuracy in most of the related instruments, and a localization algorithm which is applicable to the cases of multiple sources is not developed yet. We put forward a plane intersection method to localize multiple PD sources which may occur simultaneously in AIS. The time difference of arrival (TDOA) between antennas is estimated with the cross-correlation (CC) method, in which the CC function is interpolated with minor time interval to improve the TDOA accuracy when an acquisition instrument with low sampling rate is adopted. Thereafter, the time difference equations are solved with the plane intersection method, and the final localization results are determined as the one with highest probability among numerous signals. In the case of multiple PD sources, the K Means clustering algorithm is applied to TDOA vector of antenna array to separate UHF signals. A PD detection and localization experimental system is developed and used to test the accuracy of the proposed algorithm. The results indicate that, for diamond array with size of 4 m×2 m and PD sources within range of 10 m and 45° to normal line of antenna pair with distance of 4 m, the localization error is less than 1 m in all cases and 20 cm in most cases. Moreover, the localization accuracy for multiple PD sources are close to that of one source. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2970 / 2976
页数：6
相关论文
共 16 条
  • [1] Coenen S., Tenbohlen S., Location of PD sources in power transformers by UHF and acoustic measurements, IEEE Transactions on Dielectrics and Electrical Insulation, 19, 6, pp. 1934-1940, (2012)
  • [2] Okabe S., Ueta G., Hama H., Et al., New aspects of UHF PD diagnostics on gas-insulated systems, IEEE Transactions on Dielectrics and Electrical Insulation, 21, 5, pp. 2245-2258, (2014)
  • [3] Wang Y., Zhu M., Shao X., Et al., Simulation and experimental research on s parameter characteristics of partial discharge UHF signals in GIS, High Voltage Engineering, 44, 1, pp. 234-240, (2018)
  • [4] Moore P.J., Portugues I.E., Glover I.A., Radiometric location of partial discharge sources on energized high-voltage plant, IEEE Transactions on Power Delivery, 20, 3, pp. 2264-2272, (2005)
  • [5] Portugues I.E., Moore P.J., Glover I.A., Et al., RF-based partial discharge early warning system for air-insulated substations, IEEE Transactions on Power Delivery, 24, 1, pp. 20-29, (2009)
  • [6] Tang L., Hu Y., Wang H., Et al., Time-delay estimation of partial discharge UHF pulse signals based on interpolation cross-relation algorithm, High Voltage Engineering, 41, 10, pp. 3320-3325, (2015)
  • [7] Tang Z., Li C., Cheng X., Et al., Partial discharge location in power transformers using wideband RF detection, IEEE Transactions on Dielectrics and Electrical Insulation, 13, 6, pp. 1193-1199, (2006)
  • [8] Zheng S., Li C., He M., A novel method of newton iteration in complex field and lattice search for locating partial discharges in transformers, Proceedings of the CSEE, 33, 9, pp. 155-161, (2013)
  • [9] Zheng S.S., Li C.R., Tang Z.G., Et al., Location of PDs inside transformer windings using UHF methods, IEEE Transactions on Dielectrics and Electrical Insulation, 21, 1, pp. 386-393, (2014)
  • [10] Judd M.D., Yang L., Hunter I.B., Partial discharge monitoring of power transformers using UHF sensors. Part I: Sensors and Signal interpretation, IEEE Electrical Insulation Magzine, 21, 2, pp. 5-14, (2005)
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