海拔2500 m地区±800 k V特高压阀厅空气间隙操作冲击放电特性  

Switching Impulse Discharge Characteristics for Air Gap of±800 kV Ultra High Voltage Valve Hall in 2500 m Altitude Area

作　　者：马旭东 包正红 耿江海[3] 张成磊 李渊 丁玉剑 蒋玲 王生富 MA Xudong;BAO Zhenghong;GENG Jianghai;ZHANG Chenglei;LI Yuan;DING Yujian;Jiang Ling;WANG Shengfu(Electric Power Research Institute of State Grid Qinghai Electric Power Company,Xining 810008,China;Qinghai Key Laboratory of High Altitude Electric Power Research,Xining 810000,China;North China Electric Power University,Hebei Baoding 071003,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]国网青海省电力公司电力科学研究院,西宁810008 [2]青海省高海拔电力研究重点实验室,西宁810000 [3]华北电力大学,河北保定071003 [4]中国电力科学研究院有限公司,北京100192

出　　处：《电力电容器与无功补偿》2024年第3期88-97,共10页Power Capacitor & Reactive Power Compensation

基　　金：国网青海省电力公司科技项目(高海拔±800 kV(±1100kV)直流特高压输变电设备外绝缘关键技术研究)。

摘　　要：为准确获得2 500 m海拔以上的±800 kV特高压直流工程送端阀厅的内部设计尺寸(汉语是半句话,用句号不太合适,请作者检查)。本文在2 500 m海拔的西宁高海拔试验基地,采用升降法开展了相间和相对地间隙的放电特性试验,得到了典型间隙的操作冲击放电电压U50,并给出了放电电压与间隙距离的拟合公式。试验结果表明:空气间隙类型决定其放电特性曲线的增长率的不同,电极上均压球电极曲率半径的增大可以显著提高间隙的操作耐受能力,而针对同一种空气间隙来说,正向操作冲击电压施加的电极部位不同会直接导致放电特性曲线的不同。For obtaining accurately the internal design dimensions of the delivery valve hall of the±800 kV UHV DC project at altitude above 2500 m,the discharge characteristic test of the phase-to-phase and phase to ground gap is performed by the lifting and lowering method at Xining high-altitude test base at altitude of 2500 m,the switching impulse discharge voltage U50 of the typical gap is obtained and the fitting formula of the discharge voltage and the gap distance is given.The test results show that the type of air gap determines the magnitude of the growth rate of the discharge characteristic curve,and the increase of the radius of curvature of the grading sphere electrode on the electrode can significantly improve the switching withstanding ability of the gap.However,as for the same kind of air gap,the electrode position applied by the positive switching impulse voltage will not directly lead to the difference of the discharge characteristic curve.

关 键 词：特高压直流 阀厅 典型空气间隙 操作冲击 放电试验 

分 类 号：TM721.1[电气工程—电力系统及自动化]