高电压技术2024，Vol.50Issue(3)：1034-1042,9.DOI:10.13336/j.1003-6520.hve.20221506
基于多孔介质理论的35 kV油浸式变压器热点简化计算
Simplified Calculation of Hot Spots of 35 kV Oil Immersed Transformer Based on Porous Medium Theory
摘要
Abstract
The windings of low voltage oil-immersed transformers are often wound by enamelled round wires.In the process of the accurate calculation of temperature rise and hot spot,the influences of the gap between enamelled round wires on oil flow and temperature rise need to be taken into consideration,while the workload of fine modeling and nu-merical calculation is very large.Aiming at this problem,we propose the idea of applying porous medium theory to the simplified modeling of oil-immersed transformers.Firstly,the validity of porous medium theory applied to the hotspot calculation of oil-immersed transformers is verified.Secondly,based on the porous medium theory,a simplified model of 35 kV oil-immersed transformer winding is established,and the distribution of its temperature rise hotspots is calculated with the Fluent software.Finally,the simulation results of the simplified porous medium model of the transformer are compared with the optical fiber measurement results.The results show that the error between the hot spot temperature of the simulation results and the experimental results is within 4℃,and the hot spot position is consistent with the experi-mental results,which verifies the accuracy of the calculation method of the simplified model of porous media theory.The application of porous medium theory provides a new calculation idea for the 3D fluid thermal coupling of large-scale transformers,which is helpful to simplify the calculation of transformer hotspot temperature in engineering practice.关键词
油浸式/变压器/多孔介质理论/Fluent/热点/流-热耦合Key words
oil-immersed/transformer/porous media theory/Fluent/hotspot/fluid thermal coupling引用本文复制引用
吕金潮,陈希之,刘刚,刘云鹏,李琳..基于多孔介质理论的35 kV油浸式变压器热点简化计算[J].高电压技术,2024,50(3):1034-1042,9.基金项目
国家重点研发计划(2021YFB2401700) （2021YFB2401700）
中央高校基本科研业务费专项基金(2022MS073). Project supported by National Key R&D Program of China(2021YFB2401700),Fundamental Research Funds for the Central Universi-ties(2022MS073). （2022MS073）
