Selection of Step-Stress Test Parameters for Obtaining DC Voltage Endurance Coefficient of XLPE Insulation
Yang Lijun1, Li Zhongxuan1, Yao Renyun2, Bian Haoran1, Yuan Yuan1
1. State Key Laboratory of Transmission & Distribution Equipment and Power System Safety and New Technology Chongqing University Chongqing 400044 China; 2. State Grid Chongqing Nan’an Power Supply Company Chongqing 401336 China;
Abstract：The voltage endurance coefficient is an important performance parameter of XLPE insulation, and is also of vital basis in cable design and selection of delivery test voltage. As a high-efficiency electrical life test method, parameter selection of the step-stress method has a great influence on the test results of the voltage endurance coefficient n. In this paper, a parameter selection method for step-stress test was proposed based on three indicators, i.e. cumulative damage-time (D-t) curve, variance of damage matrix D and n value relationship curve S(n), and second order of S(n) curve. These three indicators were used as the basis for the selection of the test parameters. This method provides theoretical support for the equivalence evaluation of the step-stress method and constant-stress method in electrical life test results of insulating materials. The experimental data show that the value of voltage endurance coefficient n (n=12.0) obtained by the step-stress test parameters screened by this method has good equivalence with the result under constant-stress method (n=12.2).
杨丽君, 李仲轩, 姚人允, 边浩然, 袁媛. 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, Bian Haoran, Yuan Yuan. Selection of Step-Stress Test Parameters for Obtaining DC Voltage Endurance Coefficient of XLPE Insulation. Transactions of China Electrotechnical Society, 2019, 34(24): 5244-5251.
[1] 刘云鹏, 刘贺晨, 李演达, 等. 直流叠加交流电压下交联聚乙烯中电树枝特性研究[J]. 电工技术学报, 2018, 33(3): 601-608. Liu Yunpeng, Liu Hechen, Li Yanda, et al.Study on characteristics of electric branches of crosslinked polyethylene under DC superimposed AC voltage[J]. Transactions of China Electrotechnical Society, 2018, 33(3): 601-608. [2] 郑晓泉, Chen G, Davies A E.交联聚乙烯电缆绝缘中的电树枝与绝缘结构亚微观缺陷[J]. 电工技术学报, 2006, 21(11): 28-33. Zheng Xiaoquan, Chen G, Davies A E.Submi- croscopic defects of electrical branches and insulation structures in XLPE cable insulation[J]. Transactions of China Electrotechnical Society, 2006, 21(11): 28-33. [3] 王伟, 何东欣, 易登辉. 等. 工频电压下电缆本体的空间电荷测试[J]. 电工技术学报, 2016, 31(7): 152-158. Wang Wei, He Dongxin, Yi Denghui, et al.Space charge test of cable body under power frequency voltage[J]. Transactions of China Electrotechnical Society, 2016, 31(7): 152-158. [4] 蒋佩南, 万树德, 董五一. 国产交联电缆的寿命评定和分析[J]. 电气应用, 1988(10): 45-46. Jiang Peinan, Wan Shude, Dong Wuyi.Life assessment and analysis of domestic cross-linked cables[J]. Electrotechnical Application, 1988(10): 45-46. [5] 赵军圣, 庄光明, 王增桂. 极大似然估计方法介绍[J]. 长春理工大学学报, 2010, 5(6): 53-54. Zhao Junsheng, Zhuang Guangming, Wang Zenggui.Introduction to the maximum likelihood estimation method[J]. Journal of Changchun University of Science and Technology, 2010, 5(6): 53-54. [6] 陈宇. 电气绝缘电压寿命指数N值的极大似然估计[J]. 吉林电力技术, 1999(2): 5-7. Chen Yu.Maximum likelihood estimation of N value of electrical insulation voltage life index[J]. Jilin Electric Power, 1999(2): 5-7. [7] 王雅群, 尹毅, 李旭光, 等. 等温松弛电流用于10kV XLPE电缆寿命评估的方法[J]. 电工技术学报, 2009, 24(9): 33-37, 52. Wang Yaqun, Yin Yi, Li Xuguang, et al.Method for isothermal relaxation current for 10kV XLPE cable life assessment[J]. Transactions of China Electro- technical Society, 2009, 24(9): 33-37, 52. [8] 柯春俊, 林春耀, 欧小波, 等. 步进电压下变压器匝间绝缘电压寿命指数新解法[J]. 哈尔滨理工大学学报, 2016, 21(5): 66-72. He Chunjun, Lin Chunyao, Ou Xiaobo, et al.New solution of diurnal insulation voltage life index of transformer under step voltage[J]. Journal of Harbin University of Science and Technology, 2016, 21(5): 66-72. [9] Wang Han, Zhao Yu, Ma Xiaobing.Mechanism equivalence in designing optimum step-stress accelerated degradation test plan under Wiener process[J]. IEEE Access, 2018, 6: 4440-4451. [10] Mazzanti G.What have we still to learn about the inverse power model[C]//2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena, Toronto, Ontario, Canada, 2016: 959-962. [11] 欧阳本红, 刘松华, 邓显波, 等. 高压XLPE电缆绝缘厚度优化设计[J]. 高电压技术, 2016, 42(8): 2388-2393. Ouyang Benhong, Liu Songhua, Deng Xianbo, et al.Optimization design of insulation thickness of high voltage XLPE cable[J]. High Voltage Engineering, 2016: 42(8): 2388-2393. [12] Liu Tong, Lü Zepeng, Wang Ya, et al.A new method of estimating the inverse power law ageing parameter of XLPE based on step-stress tests[C]//2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Shenzhen, China, 2013: 69-72. [13] Suzuki T, Kishi K, Uozumi T, et al.Study on Vt characteristics for XLPE cable[C]//Proceedings of IEEE/PES Transmission and Distribution Conference, Chicago, IL, USA, 1994: 192-199. [14] 杨丽君, 廖瑞金, 李剑, 等. 用逐步升压法和Weibull参数估计油纸绝缘寿命[J]. 高电压技术, 2004, 30(6): 4-6, 8. Yang Lijun, Liao Ruijin, Li Jian, et al.Estimating oil-paper insulation life with step-up method and Weibull parameters[J]. High Voltage Engineering, 2004, 30(6): 4-6, 8. [15] 刘刚, 刘斯亮, 金尚儿, 等. 基于理、化、电特性的110kV XLPE绝缘电缆剩余寿命的综合评估[J]. 电工技术学报, 2016, 31(12): 72-79, 107. Liu Gang, Liu Siliang, Jin Shanger, et al.Com- prehensive evaluation of remaining life of 110kV XLPE insulated cable based on rational, chemical and electrical characteristics[J]. Transactions of China Electrotechnical Society, 2016, 31(12): 72-79, 107. [16] 刘霞, 于钦学, 钟力生, 等. 高压XLPE电缆绝缘V-t特性研究综述[J]. 南方电网技术, 2015, 9(10): 57-63. Liu Xia, Yu Qinxue, Zhong Lisheng, et al.Summary of research on V-t characteristics of high voltage XLPE cable insulation[J]. Southern Power System Technology, 2015, 9(10): 57-63. [17] Bian H R, Ma Z P, Fei D B, et al.A multisample test method for the voltage endurance coefficient of insulation for XLPE DC cables[C]//2017 Academic Conference of High Voltage Special Committee, Chengdu, China, 2017: 746-753.
2019, Vol. 34 
