Effect of Thermal Aging on Voltage Stabilizer to Enhance Insulation Properties of Cross-Linked Polyethylene
Hong Zelin1, Dai Chao1, Zhang Mengtian1, Li Xiujuan2, Chen Xiangrong1
1. Zhejiang Provincial Key Laboratory of Electrical Machine Systems College of Electrical Engineering Zhejiang University Hangzhou 310027 China; 2. Zhejiang Wanma Macromolecule Material Co. Ltd Hangzhou 311305 China
Abstract In order to further improve the electrical performance of cross-linked polyethylene (XLPE), 1% m-aminobenzoic acid, selected as voltage stabilizer, was added into XLPE blend by a solution method, and accelerated thermal aging experiment was carried out on the sample. The electrical properties of the materials before and after adding voltage stabilizer and thermal aging were analyzed by space charge, conductivity and surface potential decay measurements. The influence of the voltage stabilizer and thermal aging on the trap was analyzed by the distribution of the electric field and trap energy levels. The results show that m-aminobenzoic acid can effectively inhibit the space charge accumulation in XLPE, improve the distribution of electric field inside the sample, and reduce the DC conductivity of the sample. After thermal aging, the space charge accumulation and electric field distortion were obvious, the rate of the potential decay decrease, and DC conductivity increase. It can be seen that the addition of voltage stabilizer led to the increase of the density of deep and shallow traps inside the sample, and improved the charge injection barrier. Thermal aging reduces the density of traps and deepens the depth of traps, resulting in the accumulation of space charge and obvious electric field distortion, thus reducing the electrical properties of materials.
Hong Zelin,Dai Chao,Zhang Mengtian等. Effect of Thermal Aging on Voltage Stabilizer to Enhance Insulation Properties of Cross-Linked Polyethylene[J]. Transactions of China Electrotechnical Society, 2021, 36(zk1): 8-13.
[1] 杜伯学, 韩晨磊, 李进, 等. 高压直流电缆聚乙烯绝缘材料研究现状[J]. 电工技术学报, 2019, 34(1): 179-191. Du Boxue, Han Chenlei, Li Jin, et al.Research status of polyethylene insulation material for HVDC cable[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 179-191. [2] Kisin S, Doelder J D, Eaton R F, et al.Quantum mechanical criteria for choosing appropriate voltage stabilization additives for polyethlene[J]. Polymer Degradation and Stability, 2009, 94(2): 171-175. [3] Eichhorn R M.Treeing in solid extruded electrical insulation[J]. IEEE Transactions on Electrical Insu- lation, 1976, 12(1): 2-18. [4] Englund V, Huuva R, Gubanski S M, et al.Synthesis and efficiency of voltage stabilizers for XLPE cable insulation[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2009, 16(5): 1455-1461. [5] Sekii Y, Kawanami H, Saito M, et al.DC tree and grounded DC tree in XLPE[C]//Proceedings of the 2005 Annual Report Conference on Electrical Insu- lation and Dielectric Phenomena, Nashville, US, 2005: 523-526. [6] 屠德民, 吴力煌, 伍学正, 等. 场致电导的树枝抑制原理——提高聚乙烯树枝化击穿电压的有效途径[J]. 西安交通大学学报, 1981, 15(2): 95-106. Tu Demin, Wu Lihuang, Wu Xuezheng, et al.Dendritic inhibition principle of field-induced conductance-an effective way to improve the break- down voltage of polyethylene dendrization[J]. Journal of Xi’an Jiaotong University, 1981, 15(2): 95-106. [7] 李忠华, 尹毅, 朱军, 等. 自由基清除剂类电压稳定剂的温度和浓度效应[J]. 电工技术学报, 1999, 14(1): 40-44. Li Zhonghua, Yin Yi, Zhu Jun, et al.Temperature and concentration effects of free radical scavengers like voltage stabilizers[J]. Transactions of China Electro- technical Society, 1999, 14(1): 40-44. [8] 尹毅, 李忠华, 孙晶, 等. 一种改善聚乙烯聚集状态的电压稳定剂[J]. 高分子材料科学与工程, 1999, 16(6): 99-102. Yin Yi, Li Zhonghua, Sun Jing, et al.The utility model relates to a voltage stabilizer which improves the aggregation state of polyethylene[J]. Polymer Materials Science and Engineering, 1999, 16(6): 99-102. [9] 谢庆, 张采芹, 闫纪源, 等. 不均匀直流电场下绝缘材料表面电荷积聚与消散特性[J]. 电工技术学报, 2020, 34(4): 817-830. Xie Qing, Zhang Caiqin, Yan Jiyuan, et al.The sur- face charge accumulation and dissipation characteristics of insulating materials under non-uniform direct current field[J]. Transactions of China Electro- technical Society, 2020, 34(4): 817-830. [10] 陈向荣, 玉林威, 刘海燕, 等. 电压稳定剂改善聚乙烯共混材料绝缘性能的研究[J]. 西安交通大学学报, 2019, 53(12): 87-96. Chen Xiangrong, Yu Linwei, Liu Haiyan, et al.Study on voltage stabilizer to improve insulation perfor- mance of polyethylene blends[J]. Journal of Xi’an Jiaotong University, 2019, 53(12): 87-96. [11] 刘云鹏, 刘贺晨, 高丽娟, 等. 电声脉冲法研究热老化对160kV直流电缆绝缘材料陷阱特性的影响[J]. 电工技术学报, 2016, 31(24): 105-112. Liu Yunpeng, Liu Hechen, Gao Lijuan, et al.Influence of thermal stress on the traps energy properties of 160kV HVDC cable insulation material based on pulsed electro-acoustic method[J]. Transa- ctions of China Electrotechnical Society, 2016, 31(24): 105-112. [12] 李彦青, 郝建, 刘丛, 等. 绝缘纸板表面微纳Al2O3/PTFE复合功能层制备及其对空间电荷注入的影响[J]. 电工技术学报, 2020, 35(18): 3960-3971. Li Yanqing, Hao Jian, Liu Cong, et al.Preparation of micro-nano Al2O3/PTFE composite functional layer on insulating board surface and its influence on space charge injection[J]. Transactions of China Electro- technical Society, 2020, 35(18): 3960-3971.
2021, Vol. 36 
