干式空心電抗器漏磁場(chǎng)引起鋼結(jié)構(gòu)發(fā)熱規(guī)律研究
陳鵬1，周?chē)?guó)梁1，尚星宇2，陳晨3，馬亮1，楊金根1，梁言橋1
(1 中國(guó)電力工程顧問(wèn)集團(tuán)中南電力設(shè)計(jì)院有限公司，湖北 武漢 430071；
2 西安交通大學(xué) 電力設(shè)備電氣絕緣國(guó)家重點(diǎn)實(shí)驗(yàn)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(guò)的交流基頻電流產(chǎn)生交變磁場(chǎng)，在橋臂電抗器室內(nèi)形成回路的金屬結(jié)構(gòu)中產(chǎn)生感應(yīng)環(huán)流，當(dāng)金屬回路中出現(xiàn)接觸電阻時(shí)，可能發(fā)生明顯的發(fā)熱現(xiàn)象。選取換流站橋臂電抗器室內(nèi)常見(jiàn)的突出物和環(huán)形鋼結(jié)構(gòu)進(jìn)行有限元仿真，通過(guò)改變研究目標(biāo)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(duì)橋臂電抗器周邊電磁場(chǎng)引起鋼結(jié)構(gòu)體系發(fā)熱規(guī)律進(jìn)行了研究和總結(jié)，為工程設(shè)計(jì)和實(shí)施提供了參考。
關(guān)鍵詞： 空心電抗器；環(huán)形鋼結(jié)構(gòu)；有限元仿真
中圖分類(lèi)號(hào)：TM47 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：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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