水电厂结露对设备绝缘影响的微观研究  

Microscopic Study on the Influence of Condensation on Equipment Insulation in Hydropower Plants

作　　者：陈琛 梁文岳 王申煜宸 张书蕾 CHEN Chen;LIANG Wenyue;WANG Shenyuchen;ZHANG Shulei(Geheyan Power Plant,Qingjiang Hydroelectric Development Co.,Ltd.,Hubei Energy Group,Yichang 443000,China;Hubei Provincial Natural Gas Development Co.,Ltd.,Hubei Energy Group,Wuhan 430000,China)

机构地区：[1]湖北能源清江水电开发公司隔河岩电厂,湖北宜昌443000 [2]湖北能源湖北省天然气发展有限公司,湖北武汉430000

出　　处：《水电与新能源》2025年第3期68-71,共4页Hydropower and New Energy

摘　　要：为了揭示结露对绝缘材料分子结构和电性能的影响,进而更深入地了解设备故障的原因,建立了聚酰亚胺及其含水聚合物模型,采用分子动力学(MD)的分子模拟方法,对比研究了水分子对聚酰亚胺体系结构与性能的影响。结果表明,水分子的存在会使聚酰亚胺的玻璃转化温度降低使得其热稳定性减弱,影响聚酰亚胺的力学性能,导致聚酰亚胺的绝缘性能性能显著下降。结果诠释了潮湿环境下设备绝缘异常原因。In order to reveal the influence of condensation on the molecular structure and electrical properties of insulation materials,and obtain a deeper understanding of the causes of equipment failures,models of polyimide and its aqueous polymers are constructed,and the effect of water molecules on the structure and properties of polyimide systems is studied by using the molecular dynamics(MD)simulation method.The results show that the presence of water molecules can lower the glass transition temperature of polyimide,weaken its thermal stability,affect its mechanical properties,and significantly reduce its insulation performance.The results explain the abnormal reduction of equipment insulation in humid environment.

关 键 词：水电厂 绝缘降低异常 分子动力学 聚酰亚胺 水分子 

分 类 号：TV698[水利工程—水利水电工程]