摘要
苏通特高压气体绝缘输电线路(GIL)综合管廊输送容量大,电压等级高,输送距离长,管廊内存在SF_6气体泄漏和累积的可能性要远高于其他管廊,目前针对管廊中SF_6的泄漏量测量实施困难,缺乏数据,因此需要借助数值模拟的方法对管廊内SF_6气体分布特性进行研究。依据管廊结构,建立管廊的物理模型;采用计算流体力学(CFD)理论进行了数值模拟计算,研究了不同泄漏口朝向、不同泄漏口高度以及不同泄漏口面积对管廊内SF_6空间分布特性的影响,为管廊内SF_6监测器布点方案提供参考。结果表明:管廊内的SF_6分布特性主要受流动方式的影响,涡旋区域的SF_6体积分数较高;管廊下部体积分数要大于上部体积分数,靠近管廊两侧的体积分数比中心体积分数高;泄漏口面积越大,泄漏量越大,管廊内的高体积分数区域越多。
Suzhou-Nantong ultra-high voltage gas insulated transmission line(GIL)pipe gallery has large transmis-sion capacity,high voltage level,long conveying distance,the possibility of SF6 gas leakage and accumulation in the gallery is much higher than others.The leakage measurement of SF6 is difficult to implement and lacks data.There-fore,numerical simulation is needed to study the distribution characteristics of SF6 gas in the gallery.Firstly,the structure of the pipe gallery is analyzed,and the physical model of the pipe gallery is established.Then,the numeri-cal simulation is carried out based on the theory of computational fluid dynamics(CFD).The effects of different leak-age port orientation,different leakage port height and different leakage port area on the spatial distribution character-istics of SF6 in the pipe gallery are studied,respectively,provided reference for the SF6 monitor layout in the gallery.The results show that the distribution of SF6 is mainly affected by the flow pattern.The concentration of SF6 in the vor-tex region is higher than that in other regions;The concentration in the lower part of the pipe gallery is larger than that in the upper part,and the concentration near the pipe gallery is higher than that in the center;The larger the leakage port area,the greater the leakage,the more high concentration areas in the pipe gallery.
作者
关为民
卞超
谭婷月
赵矗
程潜善
GUAN Weimin;BIAN Chao;TAN Tingyue;ZHAO Chu;CHENG Qianshan(State Grid Jiangsu Electric Power Co.,Ltd.Maintenance Company,Nanjing 210000,China;Xi’an XD Electric Research Institute Co.,Ltd.,Xi’an 710075,China)
出处
《高压电器》
CAS
CSCD
北大核心
2020年第11期102-110,共9页
High Voltage Apparatus
基金
国网江苏省电力公司科技项目资助(J2018041)。
关键词
苏通GIL综合管廊
SF_6气体泄漏
分布特性
数值模拟
Suzhou-Nantong GIL integrated gallery
SF6 gas leakage
distribution characteristics
numerical simu-lation
