脱气时间对交联聚乙烯电缆绝缘材料聚集态结构与链结构的影响

李志伟; 金海云; 张涛; 聂诗超; 张剑刚; 高乃奎; 王宜立

doi:10.7652/xjtuxb201804003

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脱气时间对交联聚乙烯电缆绝缘材料聚集态结构与链结构的影响

更新时间：2025-07-09

- 脱气时间对交联聚乙烯电缆绝缘材料聚集态结构与链结构的影响
- Effect of Degassing Time on Aggregation Structure and Chain Structure of XLPE Cable Insulation Material
- 西安交通大学学报 2018年52卷第4期页码：15-23
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
  
  : 2017-08-29。作者简介: 李志伟(1992—),男,硕士生;金海云(通信作者),男,副教授。基金项目: 国家自然科学基金资助项目(51272208)
- DOI：10.7652/xjtuxb201804003
  中图分类号： TM247
- 网络首发：2018-04-10，
  
  纸质出版：2018
- 稿件说明：
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李志伟, 金海云, 张涛, 等. 脱气时间对交联聚乙烯电缆绝缘材料聚集态结构与链结构的影响[J]. 西安交通大学学报, 2018,52(4):15-23.

Effect of Degassing Time on Aggregation Structure and Chain Structure of XLPE Cable Insulation Material[J]. 2018, 52(4): 15-23.
李志伟, 金海云, 张涛, 等. 脱气时间对交联聚乙烯电缆绝缘材料聚集态结构与链结构的影响[J]. 西安交通大学学报, 2018,52(4):15-23. DOI： 10.7652/xjtuxb201804003.

Effect of Degassing Time on Aggregation Structure and Chain Structure of XLPE Cable Insulation Material[J]. 2018, 52(4): 15-23. DOI： 10.7652/xjtuxb201804003.

摘要

通过对完整切段交联聚乙烯(XLPE)电缆进行实验室脱气处理

在不同脱气处理时间下对其绝缘层材料XLPE进行了红外光谱测试、差示扫描量热分析(DSC)、扫描电镜分析(SEM)、交联度测量及拉伸测试

研究XLPE中交联副产物含量、聚集态结构与链结构的变化。结果表明:XLPE中的交联副产物在脱气处理过程中得到了有效消除

其中苯乙酮含量随脱气处理进行至168 h大幅减少

而后趋势变缓至336 h后不再显著变化; 枯基醇减少速度缓慢

随脱气处理进行至336 h后减少趋势才变缓

说明XLPE电缆合理脱气时间应在168～336 h内。脱气处理前期

XLPE电缆绝缘材料内部自由基再交联

链结构发生变化

导致断裂伸长率增大

同时还产生晶核生成和晶粒生长两种聚集态结构变化的现象

新的小晶体出现

进一步促进断裂伸长率增大

且球晶生长完善

结晶度增大。其中链结构变化持续时间较短

聚集态结构变化持续时间较长

随着脱气处理的进行

这些变化在后期均趋于稳定。根据上述实验结果

提出了XLPE材料内部在脱气处理过程中的聚集态结构和链结构变化模型

对脱气处理过程中微观结构和宏观断裂伸长率变化进行了解释。

Abstract

The crosslinked polyethylene(XLPE)is degassed in laboratory

and the crosslinking by-products content

the aggregation structure and the chain structure are investigated by tensile test

degree of crosslinking measurement

infrared spectroscopy

differential scanning calorimetry(DSC)and scanning electron microscopy(SEM)at different degassing time. The results show that the crosslinking by-products are effectively eliminated during the degassing process

and the acetophenone content is significantly reduced after 168 h degassing

then the reduction rate slows down and remains unchanged until 336 h. However

the reduction rate of cumyl alcohol content is small

the degassing trend slows down after 336 h. Experimental results show that the optimum degassing time of XLPE cable is limited within 168-336 h. In the beginning of degassing

the free radicals inside XLPE insulation are cross-linked again and the chain structure changes

which increases elongation at break. And there are two kinds of aggregation structure changes in crystal nucleus formation and crystalline grain growth. The newly developed small crystals facilitate further promoting elongation at break

the spherocrystal growth becomes perfect

and the crystallinity increases. Moreover

the duration of chain structure changes for a shorter period while the duration of aggregation structure changes for a longer period

and those changes remain stable in the late degassing. According to the above experimental results

a change model of aggregation and chain structure of XLPE cable insulation in the degassing process is constructed

and the changes of microstructure and macroscopic elongation at break are explained.

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references

KHAN M Y A, KOO J Y. Neural network based diagnosis of partial discharge defects patterns at XLPE cable under DC stress [J]. Electrical Engineering, 2017, 99(1): 119-132.

ZHOU Fusheng, LI Jianying. Investigation of charge trapping and detrapping dynamics in LDPE, HDPE and XLPE [J]. IEEE Transactions on Dielectrics Electrical Insulation, 2016, 23(6): 3742-3751.

陈智勇, 罗传仙, 张静, 等. 电老化与加速水树老化对交联聚乙烯绝缘理化特性的影响 [J]. 西安交通大学学报, 2015, 49(4): 32-39.

CHEN Ziyong, LUO Chuanxian, ZHANG Jing, et al. Electrical aging test and accelerated water tree aging test for physicochemical properties of XLPE insulation [J]. Journal of Xi'an Jiaotong University, 2015, 49(4): 32-39.

欧阳本红, 赵健康, 李欢, 等. 交联副产物对高压XLPE电缆绝缘介电和力学性能的影响 [J]. 绝缘材料, 2015(5): 31-34.

OUYANG Benhong, ZHAO Jiankang, LI Huan, et al. Influence of crosslinking by-products on dielectric and mechanical properties of XLPE Cable Insulation [J]. Insulation Material, 2015(5): 31-34.

欧阳本红, 赵健康, 周福升, 等. 基于等温表面电位衰减法的直流电缆用低密度聚乙烯和交联聚乙烯陷阱电荷分布特性 [J]. 高电压技, 2015, 41(8): 2689-2696.

OUYANG Benhong, ZHAO Jiankang, ZHOU Fusheng, et al. Characteristics of trapped charge distribution in LDPE and XLPE used in DC cables based on isothermal surface potential decay method [J]. High Voltage Engineering, 2015, 41(8): 2689-2696.

钟琼霞, 兰莉, 吴建东, 等. 交联副产物对交联聚乙烯中空间电荷行为的影响 [J]. 中国电机工程学报, 2015, 35(11): 2903-2910.

ZHONG Qiongxia, LAN Li, WU Jiandong, et al. The influence of cross-linked by-products on space charge behaviour in XLPE [J]. Proceedings of the CSEE, 2015, 35(11): 2903-2910.

LI Huan, LI Jianying, WANG Qimeng, et al. Investigation of dielectric and mechanical properties of undegassed XLPE cable with thermal treatment [J]. High Voltage Engineering, 2015, 41(4): 1237-1242.

詹威鹏, 褚学来, 申作家, 等. 加速热氧老化中交联聚乙烯电缆绝缘聚集态结构与介电强度关联性研究 [J]. 中国电机工程学报, 2016, 36(17): 4770-4777.

ZHAN Weipeng, CHU Xuelai, SHEN Zuojia, et al. Study on aggregation structure and dielectric strength of XLPE cable insulation in accelerated thermal-oxidative aging [J]. Proceedings of the CSEE, 2016, 36(17): 4770-4777.

周韫捷, 李红雷, 王琦梦, 等. 加速热老化对XLPE电缆绝缘力学性能和介电性能的影响研究 [J]. 华东电力, 2014, 42(8): 1606-1610.

ZHOU Yunjie, LI Honglei, WANG Qimeng, et al. Effect of accelerated thermal aging on mechanical and dielectric properties of XLPE cable insulation [J]. East China Electric Power, 2014, 42(8): 1606-1610.

LI H, LI J, JIA R, et al. Role of degassing process on dielectric performance of XLPE cable insulation [C]∥Properties and Applications of Dielectric Materials. Piscataway, NJ, USA. IEEE, 2015: 168-171.

ANDREWS T, HAMPTON R N, SMEDBERG A, et al. The role of degassing in XLPE power cable manufacture [J]. IEEE Electrical Insulation Magazine, 2006, 22(6): 5-16.

朱永华, 高小庆, 杨娟娟, 等. 等温松弛电流法在高压交联聚乙烯绝缘交流电缆状态评估中的应用 [J]. 高电压技术, 2016, 42(2): 513-521.

ZHU Yonghua, GAO Xiaoqing, YANG Juanjuan, et al. Application of isothermal relaxation current technique in condition assessment for XLPE HVAC cables [J]. High Voltage Engineering, 2016, 42(2): 513-521.

KATO T, ONOZAWA R, MIYAKE H, et al. Properties of space charge distributions and conduction current in XLPE and LDPE under DC high electric field [J]. Electrical Engineering in Japan, 2016, 198(3): 19-26.

LÜ Z, CAO J, WANG X, et al. Mechanism of space charge formation in cross linked polyethylene(XLPE)under temperature gradient [J]. IEEE Transactions on Dielectrics Electrical Insulation, 2015, 22(6): 3186 -3196.

欧阳本红, 赵健康, 陈铮铮, 等. 老化方式对交流交联聚乙烯电缆空间电荷分布的影响 [J]. 高电压技术, 2012, 38(8): 2123-2128.

OUYANG Benhong, ZHAO Jiankang, CHEN Zhengzheng, et al. Influence of aging mode on space charge distribution of AC XLPE cables [J]. High Voltage Engineering, 2012, 38(8): 2123-2128.

刘通, 傅明利, 侯帅, 等. 温度梯度影响高压直流电缆用交联聚乙烯中空间电荷分布的作用机理 [J]. 高电压技术, 2015, 41(8): 2665-2673.

LIU Tong, FU Mingli, HOU Shuai, et al. Mechanism of space charge distribution in XLPE used in HVDC cables under temperature gradient [J]. High Voltage Engineering, 2015, 41(8): 2665-2673.

YU X, GAO P F, PENG X Y, et al. Effect of degassing treatment on the crystalline morphology of XLPE insulation used for 110 kV XLPE cable [J]. Materials Science Forum, 2016, 868: 33-37.

朱晓辉, 杜伯学, 高宇, 等. 交联工艺对交联聚乙烯结晶形态的影响 [J]. 绝缘材料, 2010, 43(6): 44-47.

ZHU Xiaohui, DU Boxue, GAO Yu, et al. Effects of cross-linking process on crystallinity of XLPE [J]. Insulating Materials, 2010, 43(6): 44-47.

何曼君. 高分子物理 [M]. 上海: 复旦大学出版社, 2007: 181-214.

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