Analysing the power transformer temperature limitation for avoidance of bubble formation

作     者：James Hill Zhongdong Wang Qiang Liu Christoph Krause Gordon Wilson 

作者机构：The University of ManchesterManchesterM139PLUK Weidmann Electrical Technology AGRapperswil-JonaCH 8640Switzerland National GridWarwickCV346DAUK 

出 版 物：《High Voltage》 (高电压（英文）)

年 卷 期：2019年第4卷第3期

页      面：210-216页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：J.Hill also acknowledges financial support from EPSRC(EP/L016141/1)through the Power Networks Centre for Doctoral Training 

主　　题：insulation limit power 

摘      要：Failure of a transformer is a costly incident which can impact power system operation and result in loss of supply to *** can fail through a number of mechanisms,one of which is from the formation of bubbles within the ***,the loading guidance is set to avoid certain overload temperatures as high temperature is the main cause of bubbles *** paper analyses the limit set within the loading guides,comparing the most commonly cited temperature limit of 140℃ with values taken from across the full spectra of available studies in *** is concluded that there is sufficient evidence for further investigation into formation of bubbles from transformer insulation as employing a single temperature limit may be *** of a single temperature value is unsuitable,given the wide range of potential scenarios that the transformer fleet can *** has become the go-to rationale that the moisture content of the solid insulation is the key driver for transformer bubbling *** is true,however,it is shown that other factors such as solid insulation aged condition(determined through degree of polymerisation value)and the insulation type are also important considerations.