摘要
通过建立110 kV电力变压器二维流固耦合模型,采用有限体积法对比分析天然酯绝缘油和矿物绝缘油电力变压器绕组的温升特性,然后通过实验对计算方法的正确性进行验证,同时对比分析两种绝缘油在同一变压器中的绕组过负载特性。结果表明:天然酯绝缘油变压器绕组温升略高于矿物绝缘油变压器,二者热点温升相差4.7℃,但天然酯绝缘油可提高变压器温升限值10 K以上,综合考虑天然酯绝缘油变压器绕组的温升特性优于矿物绝缘油变压器;天然酯绝缘油变压器的过负载能力优于矿物绝缘油变压器,并且随着过负载倍数的增大,二者过负载性能差距进一步扩大。
A two-dimensional fluid-solid coupling model of 110 kV power transformer was established, the winding temperature rise characteristics of natural ester insulating oil power transformer and mineral insulating oil power transformer were compared and analyzed by finite-volume method, and the correctness of the calculating method was verified through experiments. At the same time, the winding overload characteristics for the same transformer with two insulating oils were compared. The results show that the winding temperature rise of the natural ester insulating oil transformer is slightly higher than that of the mineral insulating oil transformer, and the difference of their hot spot temperature rise is 4.7℃, but the natural ester insulating oil can improve the transformer temperature rise limit by 10 K. Thus, the winding temperature rise characteristics of natural ester insulating oil transformer is better than that of mineral insulating oil transformer. The overload capacity of natural ester insulating oil transformer is better than that of the mineral insulating oil transformer, and the difference between their overload performances expands further as the overload multiplier increases.
作者
刘彦男
王浩名
杜振斌
张喜乐
张亚杰
王建民
LIU Yannan;WANG Haoming;DU Zhenbin;ZHANG Xile;ZHANG Yajie;WANG Jianmin(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;Key Laboratory of Electro-magnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin 300130,China;Hebei Provincial Key Laboratory of Electromagnetic&Structural Performance of Power Transmission and Transformation Equipment,Baoding Tianwei Baobian Electric Co.,Ltd.,Baoding 071056,China;Department of Power Engineering,North China Electric Power University,Baoding 071003,China)
出处
《绝缘材料》
CAS
北大核心
2022年第9期89-95,共7页
Insulating Materials
基金
河北省重点研发计划项目(V1586309661297)。
关键词
天然酯绝缘油电力变压器
绕组温升
过负载能力
有限体积法
natural ester insulating oil power transformer
winding temperature rise
overload capacity
finitevolume method
