Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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420 kV GIS变电站雷电侵入波过电压计算与防雷措施研究

来源:电工电气发布时间:2020-09-18 15:18 浏览次数:55
420 kV GIS变电站雷电侵入波过电压计算与防雷措施研究
 
冯汝明1,冯彪2,李鑫涛3
(1 内蒙古电力科学研究院,内蒙古 呼和浩特 010020;2 西安西电高压开关有限责任公司,陕西 西安 710077;
3 渤海大学 控制科学与工程学院,辽宁 锦州 121013)
 
    摘 要:420 kV GIS变电站在发生雷电侵入过电压时,雷电波将沿线路传入变电站,严重影响设备的绝缘水平,其与保护装置避雷器之间的绝缘配合问题是电力系统中最基本和最重要的一种绝缘配合。对氧化锌避雷器的工作原理、特性及雷电流的模拟进行了阐述,以某420 kV GIS变电站为对象,利用电磁暂态程序(ATP-EMTP)搭建了电磁暂态仿真平台,对国外某420 kV GIS变电站400 kV侧出线段杆塔受雷击时,引起绝缘子发生闪络后侵入波雷电过电压进行计算,在其最严重的单线单母单变运行方式下,在给定避雷器配置方案措施下,获得420 kV GIS变电站出线端电压互感器及主变压器端口的过电压波形。通过计算分析,设计满足规范及工程实际要求。
    关键词:GIS 变电站;雷电侵入波过电压;绝缘配合;金属氧化锌避雷器
    中图分类号:TM633+.3     文献标识码:A     文章编号: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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