12 kV開關(guān)柜用接地開關(guān)動熱穩(wěn)定性分析與改進(jìn)
李軍浩1,高鈺1,張繼平2,馬琰1
(1 平高集團(tuán)有限公司,河南 平頂山 467000;
2 河南九域平高科技發(fā)展有限公司,河南 鄭州 450007)
摘 要:12 kV 開關(guān)柜用接地開關(guān)動熱穩(wěn)定性,是接地開關(guān)最重要的性能之一。從導(dǎo)體及匯流銅管的截面積、動靜觸頭接觸面積及壓緊力、分合閘彈簧規(guī)格、接地回路電流方向等方面分析了影響動熱穩(wěn)定性的主要因素,提出 12 kV 開關(guān)柜用接地開關(guān)改進(jìn)方案,裝配制造 1 臺樣機(jī)按照動熱穩(wěn)定試驗標(biāo)準(zhǔn)進(jìn)行驗證,試驗后接地開關(guān)無明顯損壞、變形、熔焊等現(xiàn)象,能夠正常操作。
關(guān)鍵詞:12 kV 開關(guān)柜;接地開關(guān);動熱穩(wěn)定性;峰值耐受電流;短時耐受電流
中圖分類號:TM564 ;TM591 文獻(xiàn)標(biāo)識碼:B 文章編號:1007-3175(2021)12-0053-04
Analysis and Improvement of Dynamic and Thermal Stability of
Earthing Switch for 12 kV Switchgear
LI Jun-hao1, GAO Yu1, ZHANG Ji-ping2, MA Yan1
(1 Pinggao Group Co.,Ltd, Pingdingshan 467000, China;
2 Henan Jiuyu-Pinggao Technology Development Co.,Ltd, Zhengzhou 450007, China)
Abstract: The dynamic and thermal stability of earthing switch for 12 kV switchgear is related to the personal safety of power equipment and operation inspection personnel. It is a crucial function of the earthing switch.The influential factors to its dynamic and thermal stability are the cross-sectional area of conductor and collector copper pipe, the contact area and pressing force of dynamic and static contacts, the specification of opening and closing spring, the current direction of earthing circuit, etc.This paper proposed a improvement scheme of earthing switch for 12 kV switchgear.A sample machine to be verified by the standards of the dynamic and thermal stability of conventional earthing switches experiment.The result shows that it operates well and does not have problems, such as breakdown, deformation, and fusion welding.
Key words: 12 kV switchgear; earthing switch; dynamic and thermal stability; peak withstand current; short-term withstand current
參考文獻(xiàn)
[1] 全國電工術(shù)語標(biāo)準(zhǔn)化技術(shù)委員會. 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 :6-7.
[2] 全國高壓開關(guān)設(shè)備標(biāo)準(zhǔn)化技術(shù)委員會. 高壓交流隔離開關(guān)和接地開關(guān):GB 1985—2014[S] . 北京:中國標(biāo)準(zhǔn)出版社,2014 :3,12.
[3] 李合,袁淵,姜寧. 低壓電器短路試驗系統(tǒng)中開展高壓電器動熱穩(wěn)定試驗的研究[J] . 電器與能效管理技術(shù),2021(2) :54-59.
[4] 徐國政,張節(jié)容,錢家驪,黃瑜瓏. 高壓斷路器原理和應(yīng)用[M]. 北京:清華大學(xué)出版社,2000.
[5] 全國高壓開關(guān)設(shè)備標(biāo)準(zhǔn)化技術(shù)委員會.3.6 kV~40.5 kV 金屬封閉開關(guān)設(shè)備和控制設(shè)備:GB 3906—2006[S]. 北京:中國標(biāo)準(zhǔn)出版社,2007 :61.
[6] 全國高壓開關(guān)設(shè)備標(biāo)準(zhǔn)化技術(shù)委員會. 高壓開關(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—2011[S]. 北京:中國標(biāo)準(zhǔn)出版社,2012 :48-50.