Research on the variation of dielectric properties of oil-paper insulation for power equipment over a wide temperature range

作     者：Mingze Zhang Muhe Yu Wen Zhou Yilin Liang Shengjie Lei Yunbo Shi Limin Qu 

作者机构：Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbinChina School of Measurement and Communication EngineeringHarbin University of Science and TechnologyHarbinChina Electric Power Research InstituteState Grid Heilongjiang Electric Power Company LimitedHarbinChina 

出 版 物：《High Voltage》 (高电压（英文）)

年 卷 期：2024年第9卷第3期

页      面：648-658页

核心收录：

学科分类：0808[工学-电气工程] 080803[工学-高电压与绝缘技术] 08[工学] 

基　　金：Heilongjiang Provincial Postdoctoral Science Foundation,Grant/Award Number:LBH-Z22202 The technology project of the State Grid Corporation of China Headquarters,Grant/Award Number:5500-202330167A-1-1-ZN 

主　　题：insulation viscosity immersed 

摘      要：The main part of oil-immersed power equipment is oil-paper *** lower ambient temperatures,transformer oil will become *** a result,compared to those at room temperature or operating temperature,the frequency domain dielectric properties of oil-paper insulation at low temperatures are drastically *** evaluating the insulation condition of electrical equipment,it is essential to accurately determine their dielectric *** paper described the FDS test,the DC conductivity test,and the transformer oil viscosity test,which was carried out in a laboratory environment for different ageing of oil-immersed pressboard and transformer oil at 233–373 *** ef-fects of temperature on the dielectric properties at the competing mechanisms of polarisation and conductivity loss were clarified based on variations of the FDS *** the viscosity change of ageing transformer oil at low temperatures,the Arrhenius and VFT viscosity equations were used to achieve a fitting calculation in the different temperature *** on the molecular/ion transition model in the force field and electric field,the characterisation relationships between the dynamic viscosity,DC conductivity,and test temperature of transformer oil were *** limita-tions of conventional transformer oil equivalent dielectric relaxation models over a wide temperature range were finally clarified by combining the test findings of the DC con-ductivity over a wide temperature range with observed and simulated *** paper provides an essential theoretical reference when using the FDS test to diagnose the insulation performance of oil-immersed power equipment in extremely cold regions.