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Degradation and Stability of Polymeric High-Voltage Insulators and Prediction of Their Service Life through Environmental and Accelerated Aging Processes.
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-18 , DOI: 10.1021/acsomega.8b01560
Dipankar Ghosh 1 , Dipak Khastgir 1
Affiliation  

Polymeric composite insulators consisting of core fiber reinforced polymer insulators covered with polydimethylsiloxane (PDMS) housing are now replacing conventional ceramic insulators especially for high-outdoor power transmission lines due to some specific advantages. Unlike ceramics, polymers have relatively shorter life. Outdoor insulators experience different electrical, mechanical, chemical, and thermal stresses during service. The long-term service performance of these insulators and their service life estimation is an important issue, but it is complicated and time-consuming. The objective of the present investigation is to check the rate of property deterioration during service and to find the approximate lifetime. Working insulators with different ages were collected from service, and the changes in mechanical and electrical properties and hydrophobicity of the PDMS cover against aging time were measured. The service life estimated from the change in mechanical properties and surface hydrophobicity (using MATLAB software) was compared with the service life of a new compound subjected to accelerated aging tests. Prediction of service life is helpful for replacement of aged insulators from service to avoid interruption in power transmission.

中文翻译:

高分子高压绝缘子的降解和稳定性,以及通过环境和加速老化过程对使用寿命的预测。

由聚二甲基硅氧烷(PDMS)外壳覆盖的芯纤维增强聚合物绝缘子组成的聚合物复合绝缘子由于某些特殊的优势,正逐渐取代传统的陶瓷绝缘子,特别是用于高户外输电线路。与陶瓷不同,聚合物的寿命相对较短。室外绝缘子在使用过程中会承受不同的电气,机械,化学和热应力。这些绝缘子的长期使用性能及其使用寿命估算是一个重要的问题,但它既复杂又费时。本研究的目的是检查维修过程中财产退化的速度,并找出其使用寿命。从服务中收集了不同年龄的工作绝缘子,并测量了PDMS覆盖层的机械和电气性能以及疏水性随老化时间的变化。根据机械性能和表面疏水性的变化估算的使用寿命(使用MATLAB软件)与经过加速老化测试的新化合物的使用寿命进行了比较。使用寿命的预测有助于从服务中更换老化的绝缘子,从而避免电力传输中断。
更新日期:2018-09-18
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