复合绝缘子用硅橡胶老化状态评估方法

doi:10.19595/j.cnki.1000-6753.tces.L80647

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摘要复合绝缘子硅橡胶伞裙护套在长期的户外运行条件下会出现老化现象,给绝缘子运行带来隐患,运维单位需定期进行抽检分析来评估硅橡胶的老化状态,但目前尚无有效的评估方法。本文从电网系统对硅橡胶性能要求的重要指标入手,将憎水性以及耐漏电起痕和电蚀损性能两项指标分级,作为评估硅橡胶老化状态的根本凭据,然后测量材料其他的宏观微观参数,将硬度、明度、密度、热失重转折点和终点的剩余比例以及典型官能团红外光谱吸收峰等作为评估硅橡胶老化状态的备选特征量。最后利用统计分析的数学方法研究性能指标及老化状态与特征量之间的关系。结果表明,利用硬度Hshore、HC分级以及密度ρ 能判别硅橡胶的老化状态,方法简单可行,便于运维人员对硅橡胶状态的可靠的评估,保障了输电线路的安全运行。

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	夏云峰
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关键词 ：复合绝缘子, 硅橡胶, 老化状态评估, 性能指标, 特征量

Abstract：The silicone rubber of shed and sheath on composite insulator is easy to age during the long-term outdoor environment, bringing hidden troubles to the operation of insulator. So the operation and maintenance departments should evaluate the aging state of silicone rubber by sampling test method. Nevertheless there is not an effective method so far. In this paper, some important performance indicators such as hydrophobicity, tracking and erosion resistance are ranked. Various microscopic parameters of silicone rubber are measured. Alternative characteristics are used to assess aging of silicone rubber such as hardness, lightness, density, remaining mass ratios of turning point, end point on the thermal gravimetric (TG) curve and absorption peaks of typical functional group in infrared spectrum. At last, the functional relationship between key performance indicators/aging and characteristic values are studied through statistical analysis methods. The results show that aging of silicone rubber can be determined by hardness (Hshore), HC-grade and density (ρ). This method is simple and feasible to evaluate the aging of silicone rubber precisely for researchers.

Key words： Composite insulator silicone rubber evaluation of aging performance indicator characteristic value

收稿日期: 2018-07-01 出版日期: 2019-07-29

PACS:

TM863

通讯作者: 刘威,男,1991年生,硕士,研究方向为同步磁阻电机的驱动控制。E-mail:2249424340@qq.com

作者简介: 宋新明男,1968年生,博士,高级工程师,研究方向为电力市场、电网规划与运行、高电压与绝缘技术、电力企业经营与管理。E-mail:billsunggd@hotmail.com

引用本文:

夏云峰, 宋新明, 何建宗, 贾志东, 王希林. 复合绝缘子用硅橡胶老化状态评估方法[J]. 电工技术学报, 2019, 34(zk1): 440-448. Xia Yunfeng, Song Xinming, He Jianzong, Jia Zhidong, Wang Xilin. Evaluation Method of Aging for Silicone Rubber of Composite Insulator. Transactions of China Electrotechnical Society, 2019, 34(zk1): 440-448.

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