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热老化对矿物油及混合油纸绝缘水分平衡曲线的影响


Moisture equilibrium curves are widely used to estimate the moisture content of insulation paper in field transformers. The thermal aging effects on moisture equilibrium curves of mineral oil-paper and a new aging-resistant mixed oil-paper insulation system were studied. The purpose was to assess the moisture content accurately, particularly in transformers used for long-term operations. Thermal aging experiment was conducted at 130℃ for 80 days, and moisture equilibrium curves at five different aging degrees and three different temperatures were constructed. Results showed that with deepened aging degree, moisture equilibrium curves shifted toward the abscissa axis of the rectangular plane coordinate system. The mass fraction of moisture content in oil and paper was calculated at each aging degree. Comparative results revealed that the moisture absorption capacity of insulation paper had an age-related decreasing tendency, whereas the moisture absorption capacity of insulating oil had an age-related increasing tendency. The moisture equilibrium curves of mixed oil-paper insulation system at 85℃ of 5 different aging degrees are shown in Figure 1.......

【作者名称】: 廖瑞金, 林元棣, 夏桓桓, 郭沛
【作者单位】: 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044, 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044, 云南电力试验研究院(集团)有限公司电力研究院,昆明,650051, 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044
【关 键 词】: 矿物油, 混合油纸, 绝缘水分, 平衡曲线, 热老化处理
【会议名称】: 第十四届全国工程电介质学术会议论文集
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 100,000,198
【摘要长度】: 1,165
【会议地点】: 西安
【会议组织】: 中国电工技术学会
【会议时间】: 2013
【上篇论文】: 中文会议 - Reliable and Relevant? CAE analyses that are fit-for-purpose:the role of NAFEMS
【下篇论文】: 中文会议 - 奈米金探针应用於区分肺结核杆菌之方法

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