电力变压器混片铁心的优化设计  

Optimal Design of Hybrid Laminated Core for Power Transformer

作　　者：张长庚[1] 王锴 王春光 万振宇 ZHANG Changgeng;WANG Kai;WANG Chunguang;WAN Zhenyu(Province--ministry Joint Key L aboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology,Tianjin 300130,China;TBEA Tianjin Transformers Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]河北工业大学电磁场与电器可靠性省部共建重点实验室,天津300130 [2]天津市特变电工变压器有限公司,天津300450

出　　处：《变压器》2024年第10期1-5,共5页Transformer

摘　　要：电力变压器是电力系统中的关键设备,对整个电力系统中发电和电能传送具有重要作用。变压器铁心的损耗与内部磁通密度的分布息息相关,采用混合叠片结构可以有效减少铁心叠片库存,提高变压器铁心叠片的利用率。本文作者利用ANSYS Maxwell软件对不同类型叠片混合的变压器铁心进行了三维瞬态电磁场模拟仿真,分析了采用不同类型叠片混合时铁心的磁通密度和损耗差异。研究结果显示,当铁心的最内层叠片采用常规晶粒取向电工钢,其余叠片采用高磁导率电工钢时,铁心的损耗最小;随着在高磁导率电工钢铁心主体中加入常规晶粒取向电工钢叠片,铁心损耗的增幅达到了14.9%~49.4%。本文的研究成果可为变压器铁心的优化设计提供一定的依据。Power transformer is regarded as a key link in the power system,and plays an important role in power generation and power transmission in the whole power system.The loss of transformer core is closely related to the distribution of internal magnetic flux density,and the use of hybrid laminated structure can effectively reduce the number of core laminations and improve the operational efficiency of the transformer.In this study,three-dimensional transient electromagnetic field simulations of transformer cores mixed with different types of laminations are carried out using ANSYS Maxwell software to analyze the magnetic flux density and losses of the core when mixed with different types of laminations.The results show that the core loss is minimized when the inner layer of the core is made of conventional grain-oriented electrical steel and the rest of the stacks are made of high-permeability electrical steel,and the increase in core loss reaches 14.9%~49.4%with the addition of conventional grain-oriented electrical steel stacks to the main body of the core made of high-permeability electrical steel.The research results of this paper can provide some basis for the optimized design of transformer cores.

关 键 词：电力变压器 混合叠片 铁心损耗 

分 类 号：TM401.2[电气工程—电器]