Application of Signal Injection Method in on-line Insulation Monitoring

被引：0
|
作者：
Xi H. [1 ]
Zhou K. [1 ]
Zeng Q. [2 ]
Rao X. [1 ]
Liu L. [1 ]
Huang Y. [1 ]
机构：
[1] School of Electrical Engineering, Sichuan University, Chengdu
[2] Southeast Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group, Chengdu
来源：
Dianwang Jishu/Power System Technology | 2021年 / 45卷 / 01期
基金：
中国博士后科学基金;
关键词：
Dielectric loss factor; Fourier algorithm; On-line insulation monitoring; Power cable; Signal injection method;
D O I：
10.13335/j.1000-3673.pst.2019.1650
中图分类号：
学科分类号：
摘要：
In order to improve reliability of power system operation, it is an inevitable trend to perform online monitoring of cable insulation instead of traditional periodic maintenance to prevent power failure. All existing online monitoring methods have some limitations. Therefore, on the basis of existing studies, this paper proposes an online monitoring method of low-frequency dielectric loss combining signal injection method and dielectric loss method, and studies its principle and effect through simulation and experiment respectively. The simulation part includes monitoring of thermal aging, water-tree aging, and the influence of noise, low frequency fluctuation and harmonics on simulation results. The experiment part includes making thermal aging and water tree aging cable samples respectively, and designing experimental circuit to verify the simulation results. Finally, through sample microscopic test, the experiment principle is analyzed. Simulation and experiment results show that for different types of cable aging and insulation faults, the aging degree of cables can be judged by the low-frequency dielectric loss in response to the injected low-frequency signal. © 2021, Power System Technology Press. All right reserved.
引用
收藏
页码：409 / 416
页数：7
相关论文
共 25 条
  • [1] Zhou Kai, Wang Xianjing, Zhao Shilin, Et al., Non-contact relay device is used to locate the partial discharge of long cable, Power System Technology, 44, 1, pp. 369-376, (2020)
  • [2] Yang Ying, You Jiao, Jia Zhidong, Et al., Valuation analysis of 10 kV XLPE cables operation condition, High Voltage Engineering, 43, 5, pp. 1684-1692, (2017)
  • [3] Zhou Kai, Zhao Shilin, He Min, Et al., A partial discharge localization method for oscillating wave in short distance cable is considered [J], Power System Technology, 41, 6, pp. 2047-2054, (2017)
  • [4] Wang Ganjun, Li Jinshu, Wu Yijiang, Et al., Optimization of partial discharge characteristics of high voltage cable based on random forest, Power Systen Technology, 43, 4, pp. 1329-1336, (2019)
  • [5] Faremo H, Lldstad E., Rehabilitation of water tree aged XLPE cable insulation[C], Conference Record of the 1994 IEEE International Symposium on Electrical Insulation, pp. 188-192, (1994)
  • [6] Zou Jianming, Application of on line monitoring technology on power grid, High Voltage Engineering, 33, 8, pp. 203-206, (2007)
  • [7] Wang Yi, Wen Xishan, Peng Ningyun, Et al., Study on the grounding in superposing DC current method for the on-line monitoring of XLPE cable, High Voltage Engineering, 26, 7, pp. 34-36, (2003)
  • [8] Zhou Zhicheng, He Junjia, Zhang Hong, Et al., Research of AC superposition method applied in the hot-line test for the insulation performance of XPLE cable, High Voltage Engineering, 31, 1, pp. 40-42, (2008)
  • [9] Li Q, Zhao T, Siew W H., Definition and digital algorithms of dielectric loss factor for condition monitoring of high-voltage power equipment with harmonics emphasis[J], IEE Proceedings- Generation,Transmission and Distribution, 152, 3, pp. 1171-1175, (2005)
  • [10] Hamon B V., An approximate method for deducing dielectric loss factor from direct-current measurements[J], Proceedings of the IEE-Part IV:Institution Monographs, 99, 3, pp. 151-155, (1952)
123