干式空心電抗器漏磁場引起鋼結構發熱規律研究
陳鵬1，周國梁1，尚星宇2，陳晨3，馬亮1，楊金根1，梁言橋1
(1 中國電力工程顧問集團中南電力設計院有限公司，湖北 武漢 430071；
2 西安交通大學 電力設備電氣絕緣國家重點實驗室，陜西 西安 710049；
3 三峽智能工程有限公司，湖北 武漢 430071)
摘 要：模塊化多電平換流器中橋臂電抗器為干式空心電抗器，其中流過的交流基頻電流產生交變磁場，在橋臂電抗器室內形成回路的金屬結構中產生感應環流，當金屬回路中出現接觸電阻時，可能發生明顯的發熱現象。選取換流站橋臂電抗器室內常見的突出物和環形鋼結構進行有限元仿真，通過改變研究目標尺寸、與電抗器頂部距離、焊接或壓接連接方式下存在接觸電阻的形式，對橋臂電抗器周邊電磁場引起鋼結構體系發熱規律進行了研究和總結，為工程設計和實施提供了參考。
關鍵詞： 空心電抗器；環形鋼結構；有限元仿真
中圖分類號：TM47 文獻標識碼：B 文章編號：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
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