低频干式变压器漏磁场分析及杂散损耗计算  

Leakage Magnetic Field Analysis and Stray Loss Calculation of Low Frequency Dry-type Transformer

作　　者：李传明 孙业荣 魏彩霞 陈飞 杨彩虹 周治伊 LI Chuan-ming;SUN Ye-rong;WEI Cai-xia;CHEN Fei;YANG Cai-hong;ZHOU Zhi-yi(Shandong Electrical Engineering&Equipment Group Intelligent Electric Co.,Ltd.,Ji'nan 250022,China;Xian Jiaotong University,Xi'an 710049,China;Gansu Electric Power Research Institute,Lanzhou 730070,China)

机构地区：[1]山东电工电气集团智能电气有限公司,山东济南250022 [2]西安交通大学,陕西西安710049 [3]国网甘肃省电力公司电力科学研究院,甘肃兰州730070

出　　处：《变压器》2023年第1期1-7,共7页Transformer

基　　金：国家电网公司总部项目“大规模提升输电容量的分频输电技术研究与关键低频设备研发”(5500-202099509A-0-0-00)资助。

摘　　要：低频输电是一种极具优势的海上风电送出方式,低频输电系统电压变换的实现需要经过优化设计的低频变压器。变压器的漏磁场会在其金属结构件中产生杂散损耗,准确地评估变压器的漏磁场及其产生的杂散损耗对变压器的安全稳定运行具有重要意义。首先建立变压器的三维有限元模型,将变压器在50Hz工况下的杂散损耗仿真计算值和经验估算值进行比较,验证三维有限元模型的有效性。采用该模型计算变压器在50/3Hz低频工况下的漏磁场分布及杂散损耗,可为低频变压器的设计提供理论支撑。Low frequency power transmission is a very advantageous offshore wind power transmission mode. The realization of voltage transformation of low frequency power transmission system requires optimized low frequency transformer. The leakage magnetic field of the transformer will cause stray loss in its metal structural parts. It is of great significance for the safe and stable operation of transformer to accurately evaluate the leakage magnetic field of transformer and the stray loss caused by it. Firstly, the threedimensional finite element model of transformer is established. The effectiveness of the three-dimensional finite element model is verified by comparing the stray loss simulation value and the empirical estimation value of the transformer when the operating frequency is 50Hz. The model is used to calculate the leakage magnetic field distribution and stray loss of the transformer when the operating frequency is 50/3Hz, which can provide theoretical support for the design of low-frequency transformer.

关 键 词：低频变压器 漏磁场 杂散损耗 

分 类 号：TM401.1[电气工程—电器]