[1]曾磊磊,曾 鑫.湿热环境下复合绝缘子HTV硅橡胶伞裙的吸湿特性研究[J].电瓷避雷器,2019,(06):210-215.[doi:10.16188/j.isa.1003-8337.2019.06.034]
 ZENG Leilei,ZENG Xin.Study on Hygroscopic Characteristics of HTV Silicone Rubber Sheds of Composite Insulators Under Humid and Hot Environment[J].,2019,(06):210-215.[doi:10.16188/j.isa.1003-8337.2019.06.034]
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湿热环境下复合绝缘子HTV硅橡胶伞裙的吸湿特性研究()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年06期
页码:
210-215
栏目:
绝缘子
出版日期:
2019-12-10

文章信息/Info

Title:
Study on Hygroscopic Characteristics of HTV Silicone Rubber Sheds of Composite Insulators Under Humid and Hot Environment
作者:
曾磊磊12 曾 鑫3
(1.国网江西省电力有限公司电力科学研究院,南昌 330096; 2.华南理工大学电力学院,广州 510640; 3.国网浙江省电力有限公司湖州供电公司,浙江 湖州 313000)
Author(s):
ZENG Leilei12 ZENG Xin3
(1.Electric Power Research Institute of State Grid Jiangxi Electric Power Company, Nanchang 330096, China; 2.School of Electrical Power, South China University of Technology, Guangzhou 510640, China; 3. State Grid Zhejiang Huzhou Power Supply Company, Huzhou 313000, China)
关键词:
复合绝缘子 HTV硅橡胶 扫描电子显微镜 吸湿特性
Keywords:
composite insulator high temperature vulcanization silicone rubber scanning electron microscopy hygroscopic characteristic
DOI:
10.16188/j.isa.1003-8337.2019.06.034
摘要:
由于长期运行在湿热的气候环境下,近年来我国南方地区复合绝缘子异常发热、击穿断裂等故障时有发生,严重威胁了电网的安全稳定运行。为了描述湿热环境下复合绝缘子高温硫化(high temperature vulcanization, HTV)硅橡胶伞裙的吸湿行为,首先对复合绝缘子HTV硅橡胶伞裙开展湿热老化实验,然后利用扫描电子显微镜(scanning electron microscopy,SEM)分析样品的微观形貌,基于称重法得到不同温度下硅橡胶的吸湿率随时间变化规律,利用Fick扩散模型对实验数据进行拟合,并与运行老化伞裙进行对比,分析HTV硅橡胶的吸湿特性。结果表明:HTV硅橡胶的吸湿过程符合基于随机热运动的Fick扩散模型。随着湿热老化时间的增加,HTV硅橡胶表面微观形貌逐渐劣化,出现孔洞等缺陷,并进一步提升了材料的吸湿率与扩散系数。环境温度的提升能够促进HTV硅橡胶的吸湿进程,在硅橡胶的生产、储存和运输过程中可适当降低环境温度,抑制材料的吸湿,提高复合绝缘子的质量。
Abstract:
Due to long-term operation in hot and humid climate, in recent years, abnormal heating and breakdown of composite insulators have occurred frequently in southern China, which seriously threatens the safe and stable operation of power grid. In order to describe the hygroscopic behavior of high temperature vulcanization(HTV)silicone rubber umbrella skirt of composite insulator under humid and hot environment, the hygrothermal aging experiment of HTV silicone rubber sheds of composite insulator was carried out firstly, and then the micro-morphology of the sample was analyzed by scanning electron microscopy(SEM). The hygroscopicity of silicone rubber at different temperatures was obtained by weighing method. Fick diffusion model was used to fit the experimental data, and the moisture absorption characteristics of HTV silicone rubber were analyzed by comparing with the aging umbrella skirt. The results show that the moisture absorption process of HTV silicone rubber conforms to Fick diffusion model based on stochastic thermal motion. With the increase of wet-thermal aging time, the surface morphology of HTV silicone rubber deteriorates gradually, resulting in defects such as voids, and further improves the moisture absorption and diffusion coefficient of the material. The increase of ambient temperature can promote the moisture absorption process of HTV silicone rubber. Therefore, in the process of production, storage and transportation of silicone rubber, the moisture absorption of materials canbe inhibited by reducing the ambient temperature appropriately, and thus improve the quality of composite insulators.

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备注/Memo

备注/Memo:
收稿日期:2019-07-11 作者简介:曾磊磊(1993—),男,硕士,主要研究方向为输电线路绝缘材料及缺陷诊断。 基金项目:由国网科技项目“直流输电线路吸热型防冰材料开发与防冰闪复合绝缘子研制”资助(编号:52182017000X)。
更新日期/Last Update: 2019-12-10