Partial Discharge Characteristics of Typical Defects in XLPE Cable Under DC Voltage

被引：0

作者：

Du H. ^{[1
]}

Guan H. ^{[1
]}

Chen X. ^{[1
]}

Hou S. ^{[2
]}

Yang M. ^{[3
]}

Wang X. ^{[3
]}

机构：

[1] Zhejiang Provincial Key Laboratory of Electrical Machine Systems, College of Electrical Engineering, Zhejiang University, Hangzhou

[2] State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid, Guangzhou

[3] Zhejiang Energy Group Research Institute Co., Ltd., Hangzhou

来源：

Gaodianya Jishu/High Voltage Engineering | 2021年 / 47卷 / 02期

基金：

国家重点研发计划;

关键词：

Direct current; Partial discharge; Statistical spectrums; Typical defects; XLPE cable;

D O I：

10.13336/j.1003-6520.hve.20200302006

中图分类号：

学科分类号：

摘要：

In order to study the process of DC partial discharge (PD) in typical defects on XLPE cables, three typical model defects were fabricated by using operated cables. The PD characteristics of three cable defect models under DC voltages were studied by pulse current method. Four statistical spectra were extracted from Q-t and N-t. The results show that needle defects have the lowest PD initiation voltage, which is -7 kV. The Q-t pattern of void defects shows a "hill" shape and there is a "dead zone" in process of discharging. Many large-amplitude discharges occur in the initial stage of needle defect model, and then the discharge activity gradually disappears. The discharge of fracture defects is the most frequent. During the discharge process of fracture defects, the discharge magnitude increases gradually, and the discharge repetition rate increases first and then decreases. There is a correlation between the discharge magnitudes of the needle defect and fracture defect in adjacent discharges, while there is a correlation between the discharge magnitude q and Δt of the void defect and the needle defect. The most discharge magnitude of the void defect is less than the average discharge magnitude, and small amplitude discharge accounts for the majority in void defects. The partial discharge magnitude of the fracture is very dense and Δt has the smallest distribution range. The results provide basic experimental data and theoretical basis for the research of DC partial discharge in the XLPE cable. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：555 / 563

页数：8

共 20 条

[1] LIU Ying, JIANG Hui, CAO Xiaolong, Comparison of AC and DC voltage endurance properties of insulation sheet samples spirally-cut from wxisting AC XLPE cables, High Voltage Engineering, 43, 11, pp. 3559-3567, (2017)
[2] YU Jingzhe, SU Yijing, ZHOU Hao, Et al., Simulation analysis of temperature field and electric field for 10 kV AC XLPE cable in DC operation, High Voltage Engineering, 43, 11, pp. 187-194, (2017)
[3] KANG Qiang, GU Xiao, XU Yang, Et al., Review of partial discharge detection under DC voltage, Southern Power System Technology, 9, 10, pp. 69-77, (2015)
[4] FROMM U., Interpretation of partial discharges at DC voltages, IEEE Transactions on Dielectrics & Electrical Insulation, 2, 5, pp. 761-770, (1995)
[5] MORSHUIS P H F, SMIT J J., Partial discharges at DC voltage: their mechanism, detection and analysis, IEEE Transactions on Dielectrics and Electrical Insulation, 12, 2, pp. 328-340, (2005)
[6] CAVALLINI A, MONTANARI G C, TOZZI M, Et al., Diagnostic of HVDC systems using partial discharges, IEEE Transactions on Dielectrics and Electrical Insulation, 18, 1, pp. 275-284, (2011)
[7] PICCIN R, MOR A, MORSHUIS P, Et al., Partial discharge analysis of gas insulated systems at high voltage AC and DC, IEEE Transactions on Dielectrics & Electrical Insulation, 22, 1, pp. 218-228, (2015)
[8] PAN C, CHEN G, TANG J, Et al., Numerical modeling of partial discharges in a solid dielectric-bounded cavity: a review, IEEE Transactions on Dielectrics and Electrical Insulation, 26, 3, pp. 981-1000, (2019)
[9] LI Junhao, SI Wenrong, YAO Xiu, Et al., Measurement and simulation of partial discharge in disc-void of oil-pressboard insulation with electrical degradation process, Proceedings of the CSEE, 29, 31, pp. 128-134, (2009)
[10] SI Wenrong, LI Junhao, YUAN Peng, Et al., Measurement and analysis for pulse sequence of partial discharge signals under DC voltage, Transactions of China Electrotechnical Society, 25, 3, pp. 164-171, (2010)

← 1 2 →