南方电网技术2024，Vol.18Issue(10)：23-30,8.DOI:10.13648/j.cnki.issn1674-0629.2024.10.003
针板结构极不均匀电场中气泡迁移特性与吸附静止状态的绝缘特性分析
Analysis of Migration Characteristics and Insulation Characteristics with Adsorption Static State of Bubbles in Extremely Inhomogeneous Electric Fields of Needle Plate Structures
摘要
Abstract
Using deionized water as the cooling medium,the cooling system of phase-change valve faces challenges in balancing insulation and heat dissipation performance,which affects the reliable operation of the system.Leveraging superior heat dissipation capabilities,phase-change cooling techniques are being gradually applied for cooling high-voltage high-power power electronic devices.However,bubbles in the liquid dielectric pose risks of insulation degradation.To better understand the migration characteristics and insulation characteristics of bubbles in the extremely inhomogeneous electric field associated with phase-change cooling,numerical simulation methods are applied to analyze the effects of three key factors on the trajectory of bubble motion,which are bubble diameter,velocity and electric field strength.Furthermore,after entering low field strength regions,the impact of bubbles with different contact angles,on the electric field distribution over insulator surfaces has been studied.The results reveal significant ef-fects of various factors on bubble motion trajectories,provide an improved understanding of bubble migration and insulation characteristics in phase-change,and hold important reference value for the further application of phase-change cooling in DC equipment.关键词
换流阀散热/气泡/数值模拟/介电泳力/迁移特性Key words
converter valve cooling/bubble/numerical simulation/dielectrophoresis force/migration characteristic分类
动力与电气工程引用本文复制引用
姚培磊,徐永生,罗兵,赵志斌..针板结构极不均匀电场中气泡迁移特性与吸附静止状态的绝缘特性分析[J].南方电网技术,2024,18(10):23-30,8.基金项目
国家自然科学基金资助项目(52077073). Supported by the National Natural Science Foundation of China(52077073). （52077073）
