調(diào)控磁場(chǎng)解決接地開關(guān)動(dòng)穩(wěn)定的方法
陳桂高,韓鵬凱
(施耐德電氣(中國)有限公司上海分公司,上海 200120)
摘 要:動(dòng)穩(wěn)定是中壓開關(guān)設(shè)備必須具備的基本功能,動(dòng)穩(wěn)定測(cè)試過程中,如果動(dòng)靜觸指之間的摩擦力及操作機(jī)構(gòu)的合閘保持力無法將動(dòng)靜觸指可靠地保持在接地合閘位置,動(dòng)觸指就會(huì)被短路電流產(chǎn)生的電動(dòng)力斥開而發(fā)生熔焊甚至燃弧。借助于有限元分析,研究了動(dòng)穩(wěn)定的發(fā)生機(jī)理,解析帶電導(dǎo)體受電動(dòng)力作用的根本原因,提出一種新的解決接地開關(guān)動(dòng)穩(wěn)定的方法,用開口導(dǎo)磁環(huán)調(diào)控動(dòng)觸指的磁場(chǎng)分布,以達(dá)到降低動(dòng)觸指受到的電動(dòng)力的目的。
關(guān)鍵詞: 導(dǎo)磁環(huán);電動(dòng)力;接地開關(guān);動(dòng)穩(wěn)定測(cè)試
中圖分類號(hào):TM564 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2024)02-0035-06
A Method of Regulating the Magnetic Field to Solve the
Stability of Grounding Switch
CHEN Gui-gao, HAN Peng-kai
(Schneider Electric (China) Ltd. Shanghai Branch Company, Shanghai 200120, China)
Abstract: Dynamic stability is the basic function that medium voltage switchgear must have, in the process of dynamic stability test, if the friction between the dynamic and static contact fingers and the closing holding force of the operating mechanism cannot reliably keep the dynamic and static contact fingers in the grounding and closing position, the moving contact fingers will be repelled by the electrodynamic force generated by the short-circuit current and fusion welding or even arcing will occur. With the help of finite element analysis, this paper studies the mechanism of dynamic stability, analyzes the root cause of the electrodynamic action of the charged conductor, and proposes a new method to solve the dynamic stability of the grounding switch, and uses the open magnetic ring to regulate the magnetic field distribution of the moving finger, so as to reduce the electrodynamic force of the moving finger.
Key words: magnetic ring; electrodynamic force; grounding switch; dynamic stability test
參考文獻(xiàn)
[1] 全國電工術(shù)語標(biāo)準(zhǔn)化技術(shù)委員會(huì). 電工術(shù)語 高壓開關(guān)設(shè)備和控制設(shè)備:GB/T 2900.20—2016[S] . 北京:中國標(biāo)準(zhǔn)出版社,2016:5.
[2] 中國電器工業(yè)協(xié)會(huì). 高壓交流開關(guān)設(shè)備和控制設(shè)備標(biāo)準(zhǔn)的共用技術(shù)要求:GB/T 11022—2020[S]. 北京:中國標(biāo)準(zhǔn)出版社,2020:24.
[3] 王家鑫. 一種大容量接地開關(guān)觸頭結(jié)構(gòu)的電動(dòng)力分析與計(jì)算[J]. 電器與能效管理技術(shù),2020(3):55-58.
[4] 陳濤,王偉. 開關(guān)柜短路峰值耐受能力校核設(shè)計(jì)[J] .船電技術(shù),2021,41(8):15-17.
[5] 趙凱華,陳熙謀. 電磁學(xué)[M] .4 版. 北京:高等教育出版社,2018.
[6] 中國鋼鐵工業(yè)協(xié)會(huì). 電磁純鐵:GB/T 6983—2022[S] .北京:中國標(biāo)準(zhǔn)出版社,2022:4.
[7] 勾國營(yíng),楊姣龍,駱常璐,等. 基于 Ansys 有限元的接地回路電動(dòng)力分析與優(yōu)化[J] . 高壓電器,2017,53(8):105-109.
[8] 段慧青,何為,肖冬萍,等. 基于解析數(shù)值法的配電房母排磁場(chǎng)屏蔽[J] . 電工技術(shù)學(xué)報(bào),2008,23(8) :13-17.