高压电器2025，Vol.61Issue(9)：65-72,8.DOI:10.13296/j.1001-1609.hva.2025.09.009
特高压换流变压器阀侧套管温度场分布特性仿真研究
Simulation Study on Temperature Field Distribution Characteristics of Valve Side Bushing for UHV Converter Transformer
摘要
Abstract
Converter transformer is the key equipment of HVDC transmission.During its long-term operation pro-cess,the valve side bushing of converter transformer will cause temperature rise of the bushing under the influence of eddy current loss,and the heating is an important reason for the deterioration of performance of bushing.The valve side bushing of converter transformer has inevitably such defects as metal particles in the process of production,in-stallation and operation,which will cause cracks under the action of thermal stress.Studying the change in the tem-perature field inside the bushing under defect the conditions is of great significance for improving the design process of valve side bushing of converter transformer and enhancing its operation reliability.Based on the actual structure of bushing of converter transformer,in this paper the simulation calculation model of temperature field distribution of the bushing is constructed,the temperature rise of the bushing under different harmonic contents and hrmonic fre-quencies is simulated and studied,and the change of temperature field under metal particle defects and crack defects is analyzed by constructing a defect model of the bushing.The simulation results show that,in case of normal opera-tion,the temperature of the epoxy resin capacitor core of the valve side bushing of the converter transformer decreas-es gradually along the radial direction.The higher the RMS value of harmonic current,the higher the harmonic cur-rent frequency,and the greater the maximum temperature inside the bushing.In case of increase of proportion of har-monic current,its influence on temperature rise increases.In case of metal particles in the bushing,the temperature gradient at the defect increases;and in case of cracks in the bushing,the temperature gradient at the defect decreases.关键词
阀侧套管/温度场/谐波/金属颗粒/纹裂Key words
valve side bushing/temperature field/harmonics/metal particles/cracks引用本文复制引用
高雨婷,陈欢,余嘉文,崔杰,李军浩..特高压换流变压器阀侧套管温度场分布特性仿真研究[J].高压电器,2025,61(9):65-72,8.基金项目
陕西省杰出青年科学基金(2024JC-JCQN-42).Project Supported by Shaanxi Provincial Outstanding Youth Science Fund(2024JC-JCQN-42). （2024JC-JCQN-42）
