干式空心电抗器漏磁场引起钢结构发热规律研究
陈鹏1，周国梁1，尚星宇2，陈晨3，马亮1，杨金根1，梁言桥1
(1 中国电力工程顾问集团中南电力设计院有限公司，湖北 武汉 430071；
2 西安交通大学 电力设备电气绝缘国家重点实验室，陕西 西安 710049；
3 三峡智能工程有限公司，湖北 武汉 430071)
摘 要：模块化多电平换流器中桥臂电抗器为干式空心电抗器，其中流过的交流基频电流产生交变磁场，在桥臂电抗器室内形成回路的金属结构中产生感应环流，当金属回路中出现接触电阻时，可能发生明显的发热现象。选取换流站桥臂电抗器室内常见的突出物和环形钢结构进行有限元仿真，通过改变研究目标尺寸、与电抗器顶部距离、焊接或压接连接方式下存在接触电阻的形式，对桥臂电抗器周边电磁场引起钢结构体系发热规律进行了研究和总结，为工程设计和实施提供了参考。
关键词： 空心电抗器；环形钢结构；有限元仿真
中图分类号：TM47 文献标识码：B 文章编号：1007-3175(2022)06-0044-04
Research on Heating Law of Steel Structure System Caused by Leakage
Magnetic of Dry-Type Air-Core Reactor
CHEN Peng1, ZHOU Guo-liang1, SHANG Xing-yu2, CHEN Chen3, MA Liang1, YANG Jin-gen1, LIANG Yan-qiao1
（1 Central Southern China Electric Power Design Institute Co., Ltd. of China Power Engineering Consulting Group, Wuhan 430071, China;
2 State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China;
3 Three Gorges Intelligent Engineering Co., Ltd, Wuhan 430071, China）
Abstract: The bridge arm reactor in the modular multilevel converter is the dry-type air-core reactor.The fundamental-frequency current in the alternating current of the electric reactor produces the alternating magnetic field. Moreover, it forms an induced circulating current in the metal structure of the bridge arm reactor. Heating phenomena could emerge when the contact resistance appears in the metallic return circuit.This paper chose the projection and the ring steel structure of the bridge arm reactor to conduct the finite element simulation.It studies and summarizes the heating law of the steel structure system caused by an electromagnetic field around the bridge arm reactor and provides the reference for engineering design and implementation by changing the size of the research target, the distance to the top of the reactor, and the form of contact resistance under the connection mode of welding or crimping.
Key words: air-core reactor; ring steel structure; finite element simulation
参考文献
[1] 王银岭，张猛，韩艳丰，等. 桥臂空心电抗器磁场对金属结构件温升影响特性研究[J] . 变压器，2020，57(2) ：39-42.
[2] SHARIFABADI K, HARNEFORS L, NEE H P,et al.Design, control, and application of modular multilevel converters for HVDC transmission systems[M].New York ：John Wiley & Sons，2016.
[3] 陈鹏，周国梁，马亮，等. 海上柔性直流换流站阀厅布置及尺寸计算方法[J] . 南方电网技术，2021，15(11) ：62-66.
[4] 甘立，原园，刘凯，等. 分形粗糙表面弹塑性接触力学模型[J]. 应用力学学报，2016，33(5) ：738-743.
