420 kV GIS變電站雷電侵入波過電壓計(jì)算與防雷措施研究
馮汝明1,馮彪2,李鑫濤3
(1 內(nèi)蒙古電力科學(xué)研究院,內(nèi)蒙古 呼和浩特 010020;2 西安西電高壓開關(guān)有限責(zé)任公司,陜西 西安 710077;
3 渤海大學(xué) 控制科學(xué)與工程學(xué)院,遼寧 錦州 121013)
摘 要:420 kV GIS變電站在發(fā)生雷電侵入過電壓時(shí),雷電波將沿線路傳入變電站,嚴(yán)重影響設(shè)備的絕緣水平,其與保護(hù)裝置避雷器之間的絕緣配合問題是電力系統(tǒng)中最基本和最重要的一種絕緣配合。對(duì)氧化鋅避雷器的工作原理、特性及雷電流的模擬進(jìn)行了闡述,以某420 kV GIS變電站為對(duì)象,利用電磁暫態(tài)程序(ATP-EMTP)搭建了電磁暫態(tài)仿真平臺(tái),對(duì)國(guó)外某420 kV GIS變電站400 kV側(cè)出線段桿塔受雷擊時(shí),引起絕緣子發(fā)生閃絡(luò)后侵入波雷電過電壓進(jìn)行計(jì)算,在其最嚴(yán)重的單線單母單變運(yùn)行方式下,在給定避雷器配置方案措施下,獲得420 kV GIS變電站出線端電壓互感器及主變壓器端口的過電壓波形。通過計(jì)算分析,設(shè)計(jì)滿足規(guī)范及工程實(shí)際要求。
關(guān)鍵詞:GIS 變電站;雷電侵入波過電壓;絕緣配合;金屬氧化鋅避雷器
中圖分類號(hào):TM633+.3 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2020)09-0013-06
Overvoltage Calculation and Measure of Lightning Intrusion Wave in 420 kV GIS Substation
FENG Ru-ming1, FENG Biao2, LI Xin-tao3
(1 Inner Mongolia Electric Power Science Research Institute, Hohhot 010020, China; 2 Xi'an Xidian High Voltage Switch Co., Ltd, Xi'an 710077, China;
3 School of Control Science and Engineering, Bohai University, Jinzhou 121013, China)
Abstract: When a lightning intrusion overvoltage occurs in a 420 kV GIS substation, the lightning wave will be transmitted into the substation along the line, which will seriously affect the insulation level of the equipment, and the insulation coordination problem between it and the lightning arrester of the protection device is the most basic and important kind of insulation coordination in the power system.The working principle, characteristics and lightning current simulation of zinc oxide arresters are explained.Taking a 420 kV GIS substation as the object, an electromagnetic transient simulation platform is built using the electromagnetic transient program (ATP-EMTP). Calculate the lightning overvoltage of the intrusion wave after the insulator flashover occurred when the pole tower on the 400 kV side of a 420 kV GIS substation abroad was struck by lightning.Assume that under its most serious single-line single-bus single-transformation operation mode, under the given arrester configuration plan, the overvoltage waveform of the voltage transformer at the outlet end of the 420 kV GIS substation and the main transformer port is obtained.Under its most serious single-line single-bus single-transformation operation mode, under the given arrester configuration plan, the overvoltage waveform of the voltage transformer at the outlet end of the 420 kV GIS substation and the
main transformer port is obtained.
Key words: GIS substation; lightning intrusion wave overvoltage; insulation coordination; MOA
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