矿物油和天然酯混合绝缘油的理化特性和击穿电压研究  

Study on the Physics and Chemistry Characteristics and Breakdown Voltage of a Mixed Insulation Oil Composed of Mineral Oil and Natural Easter

作　　者：廖瑞金[1] 梁帅伟[1] 李剑[1] 郝建[1] 尹建国[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2009年第13期117-123,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50677073);国家杰出青年科学基金项目(50425722)~~

摘　　要：利用天然酯具有很高水饱和度等优良特性,将矿物油和天然酯混合,使两者优势互补,并结合其他研究方法研制出击穿电压更高、氧化安定性更好和环保性更好的新型绝缘油。通过正交设计试验,用萃取方法降低混合油中酸值,提高混合油PH值和工频击穿电压;用压力差式扫描法筛选出适用于新型绝缘油的优良抗氧化剂,并研究了抗氧化剂的合适添加比例。最后,分析了新型绝缘油在多个不同温度下运动黏度;并用五日生化需氧量法证明了新型绝缘油比矿物油的生物降解性更好。For the saturation of the nature ester is very high, a new insulation oil were developed by incorporating the different advantages of nature ester and mineral oil, whose breakdown voltage is higher than the mineral oil（the traditional transformer oil）, and oxidation stabilization and environmental characteristic are better than mineral oil. The acid value of the new oil is reduced, the breakdown voltage is enhanced and the PH value of the new oil is increased with the orthogonal extraction experiment. The appropriate antioxidant is chosen and its appending proportion is determined by pressure differential scanning calorimetry （PDSC） experiment. Moreover, the viscosity of the new oil at different temperature is researched, and the fact that biodegradation degree of the new oil is higher than mineral oil was verified with the BOD5 method.

关 键 词：绝缘油 天然酯 矿物油 击穿电压 运动黏度 生物降解性 

分 类 号：TM214[一般工业技术—材料科学与工程]