换流变阀侧套管水冷散热设计与优化分析  

Design and Optimization Analysis of Water Cooling Heat Dissipation for the Valve-side Bushing of Converter Transformer

作　　者：史石峰 刘杉 谢更生 王琪林 王青于 刘鹏[1] 彭宗仁[1] SHI Shifeng;LIU Shan;XIE Gengsheng;WANG Qilin;WANG Qingyu;LIU Peng;PENG Zongren(State Key Laboratory of Electrical Insulation and Power Equipment(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China;Global Energy Interconnection Research Institute,Changping District,Beijing 102209,China)

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),陕西省西安市710049 [2]全球能源互联网研究院有限公司,北京市昌平区102209

出　　处：《中国电机工程学报》2023年第12期4861-4870,共10页Proceedings of the CSEE

基　　金：国家电网公司科技项目(SGSDJY00JHJS1900209)。

摘　　要：随着我国输电线路输送容量的提升,换流变阀侧套管的发热问题日益严重,为提升其长期运行可靠性,该文提出一种适用于换流变阀侧套管的强制水冷结构。采用三维电磁–热–流耦合方法对该结构套管温度分布进行仿真分析,并通过温升试验验证其冷却效果。仿真与试验结果表明,加入水冷结构后,套管内部温度下降明显,且当空气间隙为3mm、冷却水温为45℃时,温度对芯体电场影响最小。研究表明,强制水冷结构能有效解决套管发热问题,进而提高套管载流能力与运行可靠性。With the increase in transmission capacity of China’s power transmission lines,the heating problem of the valve-side bushing of the converter transformer is becoming increasingly serious.To enhance its long-term operational reliability,this paper proposes a forced water-cooling structure for the valve-side bushing of the converter transformer.A three-dimensional electromagnetic-fluid-thermal coupling method is used to simulate the temperature distribution of the bushing,and the cooling effect is verified by temperature rise experiment.The simulation and experiment results show that the internal temperature of the bushing decreases significantly after the water-cooling structure is added,and the effect of temperature on the core electric field is minimized when the air gap is 3mm and the cooling water temperature is 45℃.The research shows that the forced water-cooling structure can effectively solve the bushing heating problem,thus improving the bushing current-carrying capacity and operational reliability.

关 键 词：强制冷却换流变阀侧套管 温度分布 温升试验 电热耦合 结构优化 

分 类 号：TM41[电气工程—电器]