Local Aging Diagnosis of XLPE Cables Using High Voltage Frequency Domain Dielectric Spectroscopy
Wang Haoyue1,2, Li Chengrong1,2, Wang Wei1,2, Wang Xiaowei1,2, Xu Qilong1,2
1. Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility North China Electric Power University Beijing 102206 China; 2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China
Abstract Water tree aging are important reasons for the degradation of XLPE cable insulation. The timely detection and treatment of those aging defects are of great significance for system operation safety. Although very-low frequency (VLF, 0.1Hz) dielectric loss detection is widely used for the cable aging detection, it has low sensitivity for local defects and cannot distinguish the aging defects types. In this paper, high voltage frequency-domain spectroscopy (FDS) is carried out to diagnose XLPE cable insulation aging defects. Through the accelerated aging experiment, the water tree aging and thermal aging defective cable segments are prepared. Then the high-voltage dielectric spectroscopy (0.01~0.1Hz) under different voltage levels is detected on the 27.4m long 10kV cable before and after local aging. The dielectric parameters, layering degree S and the hysteresis degree D of FDS curve, are defined and analyzed. The FDS results are also compared with the VLF (0.1Hz) dielectric loss detection. The results show that the VLF method is difficult to find local thermal aging and 70% water tree penetration defects, while the high-voltage FDS is sensitive to local thermal aging and local water tree aging defects. It is found that the layering degree S of thermal aging and water tree aging samples is greater than 1, which can be used as the criterion of cable aging; the hysteresis degree D of the water tree aging sample is significantly greater than that of the thermal aging sample, which can be used as a characteristic quantity to distinguish thermal aging and water tree aging of XLPE cables.
Wang Haoyue,Li Chengrong,Wang Wei等. Local Aging Diagnosis of XLPE Cables Using High Voltage Frequency Domain Dielectric Spectroscopy[J]. Transactions of China Electrotechnical Society, 2022, 37(6): 1542-1553.
[1] 赵健康, 李文杰. 国家电网公司电力电缆运行情况报告[C]//第十三届全国工程电介质学术会议论文集, 西安, 2011: 44. [2] 吴明祥, 欧阳本红, 李文杰. 交联电缆常见故障及原因分析[J]. 中国电力, 2013, 46(5): 66-70. Wu Mingxiang, Ouyang Benhong, Li Wenjie.Common faults and cause analysis of XLPE cable[J]. Electric Power, 2013, 46(5): 66-70. [3] Heinhold L.电力电缆及电线[M]. 北京: 中国电力出版社, 2001. [4] 周凯, 李诗雨, 尹游, 等. 退运中压XLPE和EPR电缆老化特性分析[J]. 电工技术学报, 2020, 35(24): 5197-5206. Zhou Kai, Li Shiyu, Yin You, et al.Analysis of aging characteristics of medium voltage XLPE and EPR retired cables[J]. Transactions of China Electro-technical Society, 2020, 35(24): 5197-5206. [5] 黄光磊, 李喆, 杨丰源, 等. 直流交联聚乙烯电缆泄漏电流试验特性研究[J]. 电工技术学报, 2019, 34(1): 192-201. Huang Guanglei, Li Zhe, Yang Fengyuan, et al.Experimental research on leakage current of DC cross linked polyethylene cable[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 192-201. [6] 杨丽君, 李仲轩, 姚人允, 等. 获取XLPE绝缘直流电压耐受指数的步进应力试验参数选取方法研究[J]. 电工技术学报, 2019, 34(24): 5244-5251. Yang Lijun, Li Zhongxuan, Yao Renyun, et al.Selection of step-stress test parameters for obtaining DC voltage endurance coefficient of XLPE insu-lation[J]. Transactions of China Electrotechnical Society, 2019, 34(24): 5244-5251. [7] Perkel J, Valle Y D, Hampton R N, et al.Interpretation of dielectric loss data on service aged polyethylene based power cable systems using VLF test methods[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2013, 20(5): 1699-1711. [8] Zaengl W S.Dielectric spectroscopy in time and frequency domain for HV power equipment. I. theoretical considerations[J]. IEEE Electrical Insu-lation Magazine, 2003, 19(5): 5-19. [9] 张大宁, 刘孝为, 詹江杨, 等. 变压器油纸绝缘频域介电谱的虚部分析[J]. 电工技术学报, 2019, 34(4): 847-854. Zhang Daning, Liu Xiaowei, Zhan Jiangyang, et al.Analysis of imaginary part of frequency domain spectroscopy for oil paper insulation transformer[J]. Transactions of China Electrotechnical Society, 2019, 34(4): 847-854. [10] Given M J, Fouracre R A, MacGregor S J, et al. Diagnostic dielectric spectroscopy methods applied to water-treed cable[J]. IEEE Transactions on Diele-ctrics and Electrical Insulation, 2001, 8(6): 917-920. [11] 薛程. XLPE高压电缆绝缘老化状态评估研究[D]. 天津: 天津大学, 2014. [12] 梁韵. 多因素协同作用下交联聚乙烯绝缘老化评估方法研究[D]. 重庆: 重庆大学, 2015. [13] 周利军, 王媚, 周韫捷, 等. 介电谱用于评估XLPE电缆绝缘劣化状态的研究[J]. 绝缘材料, 2019, 52(1): 52-56. Zhou Lijun, Wang Mei, Zhou Yunjie, et al.Deteri-oration condition evaluation of XLPE cable insulation by dielectric spectroscopy[J]. Insulating Materials, 2019, 52(1): 52-56. [14] Fothergill J C, Dodd S J, Dissado L A, et al.The measurement of very low conductivity and dielectric loss in XLPE cables: a possible method to detect degradation due to thermal aging[J]. IEEE Transa-ctions on Dielectrics and Electrical Insulation, 2011, 18(5): 1544-1553. [15] Kemari Y, Mekhaldi A, Teyssèdre G, et al.Correlations between structural changes and dielectric behavior of thermally aged XLPE[J]. IEEE Transa-ctions on Dielectrics and Electrical Insulation, 2019, 26(6): 1859-1866. [16] 欧阳本红, 康毅, 赵健康, 等. 加速水树老化对XLPE电力电缆绝缘性能的影响[J]. 高电压技术, 2010, 36(8): 1942-1949. Ouyang Benhong, Kang Yi, Zhao Jiankang, et al.Influence of accelerated water tree aging on insulation of XLPE cables[J]. High Voltage Engineering, 2010, 36(8): 1942-1949. [17] Werelius P.Development and application of high voltage dielectric spectroscopy for diagnosis of medium voltage XLPE cables[D]. Stockholm: Department of Electrical Engineering, 2001. [18] Werelius P, Tharning P, Eriksson R, et al.Dielectric spectroscopy for diagnosis of water tree deterioration in XLPE cables[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2001, 8(1): 27-42. [19] Pedersen K, Sedding H, Fenger M, et al.Laboratory results from dielectric spectroscopy of field aged XLPE cables with respect to water trees[C]// Conference Record of the 2006 IEEE International Symposium on Electrical Insulation, Toronto, 2006: 509-514. [20] JWG D1/B1.20—493 493 Non-destructive water-tree detection in XLPE cable insulation[R/OL]. CIGRE, 2012, https://www.cigre.org/GB/publications/papers-and-proceedings. [21] Noto F, Yoshimura N.Voltage and frequency dependence of tree growth in polyethylene[C]// Conference on Electrical Insulation & Dielectric Phenomena-Annual Report, Downingtown, PA, USA, 1974: 207-217. [22] Shimizu N, Laurent C.Electrical tree initiation[J]. IEEE Transactions on Dielectrics and Electrical Insu-lation, 1998, 5(5): 651-659. [23] Young-Shin C, Mi-Ja S, Sang-Wook K.Electrical tree initiation mechanism of artificial defects filled XLPE[J]. Materials Chemistry and Physics, 1998, 56(1): 87-90. [24] Dissado L A, Wolfe S V, Fothergill J C.A study of the factors influencing water tree growth[J]. IEEE Transactions on Electrical Insulation, 1983, 18(6): 565-585. [25] 鲍明晖. 交联聚乙烯中电树枝的生长特性研究[D]. 武汉: 华中科技大学, 2011. [26] 中国国际站标准化管理委员会. GB/T 12706.2—2008 额定电压1kV(Um=1.2kV)到35kV(Um=40.5kV)挤包绝缘电力电缆及附件[S]. 北京: 中国标准出版社, 2008. [27] IEEE Std 400.2—2013 IEEE guide for field testing of shielded power cable systems using very low frequency (VLF) (less than 1Hz)[S]. New York: IEEE Power and Energy Society, 2013: 1-60. [28] Boggs S, Densley J, Kuang J.Mechanism for impulse conversion of water trees to electrical trees in XLPE[J]. IEEE Transactions on Power Delivery, 1998, 13(2): 310-315. [29] 尹游, 周凯, 李诗雨, 等. 基于极化去极化电流法的水树老化XLPE电缆界面极化特性分析[J]. 电工技术学报, 2020, 35(12): 2643-2651. Yin You, Zhou Kai, Li Shiyu, et al.Interface polarization characteristics of water tree aged XLPE cables based on polarization and depolarization current method[J]. Transactions of China Electro-technical Society, 2020, 35(12): 2643-2651. [30] 方俊鑫, 殷之文. 电介质物理学[M]. 北京: 科学出版社, 1989. [31] 赵威, 周凯, 刘凡, 等. 在XLPE电缆加速老化过程中理解水树的自愈性[J]. 电工技术学报, 2014, 29(6): 311-317, 332. Zhao Wei, Zhou Kai, Liu Fan, et al.Understanding self-healing of water tree in process of accelerated aging of XLPE cables[J]. Transactions of China Electrotechnical Society, 2014, 29(6): 311-317, 332. [32] Bhumiwat S A.On-site non-destructive diagnosis of in-service power cables by polarization/depolarization current analysis[C]//Conference Record of the 2010 IEEE International Symposium on Electrical Insu-lation, San Diego, California, USA, 2010: 1-5. [33] Hvidsten S, Ildstad E, Sletbak J, et al.Understanding water treeing mechanisms in the development of diagnostic test methods[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1998, 5(5): 754-760. [34] Thomas A J, Saha T K.Statistical analysis of diagnostic indicators during an accelerated ageing experiment for XLPE cable specimens[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2012, 19(1): 274-282.
2022, Vol. 37 
