应用小磁环加装大磁环抑制GIS中VFTO的试验研究  

Experimental Study on Suppressing VFTO in GIS with Small and Large Magnetic Rings

作　　者：高凡夫 谭向宇 梁策 张敬平[4] 王建杰[4] 梁志瑞[1] GAO Fanfu;TAN Xiangyu;LIANG Ce;ZHANG Jingping;WANG Jianjie;LIANG Zhirui(School of Electrical and Electronic Engineering,North China Electric Power University,Hebei Baoding 071000,China;Yunnan Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;Huadian Power Company Limited(Beijing),Beijing 100071,China;State Grid Cangzhou Power Supply Company,Shandong Cangzhou 061000,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071000 [2]云南电网有限责任公司电力科学研究院,昆明650217 [3]华电(北京)热电有限公司,北京100071 [4]国网沧州供电公司,山东沧州061000

出　　处：《高压电器》2019年第6期56-61,69,共7页High Voltage Apparatus

基　　金：南方电网公司科技项目(YNKJ00000002)~~

摘　　要：特快速暂态过电压(very fast transient overvoltage,VFTO)严重威胁到气体绝缘开关设备(gas insulated substation,GIS)和邻近设备的安全运行,在总结前人研究的基础上,文中提出应用小磁环加装大磁环抑制GIS中的VFTO。依托VFTO发生器和真实500 kV GIS组成的试验平台,分别在充电电压为460、500、540、560 kV情况下开展无磁环、40、80 cm小磁环串和80 cm小磁环串加装10 cm大磁环串的一系列对比试验,其中小磁环串是由铁氧体磁性材料构成,大磁环是由纳米晶软磁材料制成。试验数据表明小磁环加装大磁环在所有试验中取得了较好的抑制效果,同时也指出磁环串的长度与抑制作用存在一定的关系。试验结果证实了应用小磁环加装大磁环可增强整体设备对VFTO的抑制效果。To suppress very fast transient overvoltage(VFTO)on gas-insulated switchgea(rGIS),a new approach was proposed by applying small and large magnetic rings.A test platform consisting of a VFTO generator and a real 500 kV GIS was employed to conduct a series of comparative experiments in the absence of magnetic ring,in the presence of 40 and 80 cm(in length)small ring string respectively,and in the presence of 80 cm small ring string together with 10 cm largering string.The charging voltage was 460,500,540 and 560 kV,respectively.The small rings were made of ferrite,and the large rings were made of nanocrystalline.Experimental data shown that combination of small and large ring strings can achieve better suppression effect on VFTO,and the longer the ring string,the better the suppression effect.

关 键 词：气体绝缘开关设备 特快速暂态过电压 抑制 铁氧体小磁环 纳米晶大磁环 VFTO发生器 充电电压 

分 类 号：TM643[电气工程—电力系统及自动化]