SF6/N2混合气体中金属微粒在工频电压下运动的仿真与实验研究  

Simulation and Experimental Study on the Motion of Metal Particles in SF/N Mixed Gas Under Power Frequency Voltage

作　　者：庞先海 王潇 乔松松 刘厚法 龙钰由 修士新[2] PANG Xianhai;WANG Xiao;QIAO Songsong;LIU Houfa;LONG Yuyou;XIU Shixin(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Shandong Taikai High Voltage Switchgear Co.,Ltd.,Taian 271035,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,石家庄050021 [2]西安交通大学电气工程学院,西安710049 [3]山东泰开高压开关有限公司,泰安271035

出　　处：《高电压技术》2021年第2期679-686,共8页High Voltage Engineering

基　　金：国家电网有限公司科技项目(kj2018-080)。

摘　　要：针对GIS设备内部可能残存的微粒在受到母线电压时会发生运动的问题,建立了微粒运动的数值计算模型和GIS实验模型,在SF6/N2混合气体作为绝缘介质的情况下,仿真研究了不同微粒情况下的微粒运动特性及不同微粒陷阱对金属微粒的捕获情况。仿真发现:交流电压下,金属微粒会发生频繁的上下往复运动,金属微粒的密度越大,碰撞频率和最大起跳高度越低;微粒陷阱会改变GIS设备内部的电场分布情况,不同微粒陷阱的深度和形状会对捕获微粒成功率产生影响,陷阱深度越大会使越容易捕获金属微粒。最后,通过在GIS实验模型中进行对应实验来记录金属微粒运动特性。Aiming at the problem that the residual particles inside the GIS equipment will move when subjected to the bus voltage,we establish a numerical calculation model of the particle motion and the GIS experimental model.In the case of SF6/N2 mixed gas as the insulating medium,we perform the simulation studies on the particle motion characteristics in the case of different particles and capture of metal particles by different particle traps.The simulation found that,under AC voltage,metal particles will frequently reciprocate up and down.The higher the density of metal particles is,the lower the collision frequency and the maximum take-off height will be.The particle trap will change the electric field distribution inside the GIS equipment and the depth of different particle traps.The depth and shape have effects on the success rate of the captured particles,and the greater the trap depth is,the easier it is to capture the metal particles.Finally,the motion characteristics of the metal particles were recorded by performing corresponding experiments in the GIS experimental model.

关 键 词：工频电压 SF6/N2混合气体 金属微粒 运动特性 多物理场耦合 

分 类 号：TM213[一般工业技术—材料科学与工程] TM595[电气工程—电工理论与新技术]