摘要
变压器的噪声主要是由油箱的振动产生,油箱的振动主要是由铁心的振动产生,而铁心的振动主要是由电磁力产生,为了研究铁心电磁力、铁心振动、油箱振动与近场噪声的关联关系,采用虚功法对不同电压下不同方向变压器铁心的电磁力进行了仿真计算,采用有限元分析法对不同电压下变压器铁心的振动特性进行了仿真计算,并利用加速度传感器测试了不同电压作用下不同方向铁心、油箱的振动特性,以及变压器的近场噪声特性,探讨了铁心振动的传递过程,发现铁心电磁力的大小、方向、频率与铁心振动、油箱振动、变压器近场噪声具有明显的相关性。
The noise of the transformer is mainly generated by the vibration of the oil tank, which is mainly generated by the vibration of the iron core, while the vibration of the iron core is mainly generated by the electromagnetic force. In order to study the correlation among ferromagnetic force, core vibration, oil tank vibration and near field noise. In this paper, the electromagnetic force of transformer in different direction under different voltage is simulated by using virtual work method, the vibration state of the core is analyzed by finite element method. And the vibration characteristics of the core and oil tank in different directions under different voltages and the near field noise characteristics of the transformer were tested by using acceleration sensors. At last the transmission process of core vibration is discussed. The results show that the magnitude, direction and frequency of ferromagnetic force are obviously correlated with the vibration of ferromagnetic core, the vibration of oil tank and the noise of transformer near field.
作者
樊超
聂京凯
肖伟民
王广周
汲盛昌
杨富尧
刘洋
杜鹏宇
FAN Chao;NIE Jingkai;XIAO Weimin;WANG Guangzhou;JI Shengchang;YANG Fuyao;LIU Yang;DU Pengyu(Global Energy Interconnection Research Institute Co.Ltd.,Beijing 102211,China;Beijing Municipal Institute of Labor Protection-State,Beijing 100054,China;Power Science Research Institute of State Grid Henan Electric Power Company,Zhengzhou 450052,China;Xi'an Jiaotong University,Xi'an 710049,China;State Grid Shijiazhuang Power Supply Company,Shijiazhuang 050000,China)
出处
《中国电力》
CSCD
北大核心
2020年第10期34-41,共8页
Electric Power
基金
国家电网有限公司总部科技项目(高压变电设备降噪用带隙耦合声学超材料应用基础研究,5500-202058312A-0-0-00)。
关键词
变压器
铁心
油箱
电磁
振动
噪声
transformer
iron core
fuel tank
electromagnetism
vibration
noise
