Numerical Simulation of Self-excited Oscillation Switching Current in HVDC MRTB  

作　　者：LI Yang YANG Fei RONG Mingzhe WU Yi WU Yifei SUN Hao 

机构地区：[1]State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China

出　　处：《高电压技术》2013年第10期2547-2552,共6页High Voltage Engineering

基　　金：Project supported by National Natural Science Foundation of China （51007072, 51177124）, Doctoral Foundation of Ministry of Education of China （20110201130006, 20110201120069）, New Century Excellent Talents Program from Ministry of Education of China.

摘　　要：This paper presents a numerical study of the current self-excited oscillations during the opening of high voltage direct current(HVDC) metallic return transfer breaker(MRTB).The switching arc is simulated using the magneto-hydrodynamics(MHD) theory coupled with the electric circuit variation.The simulation is proved accurate in simulating the current oscillation and the commutation process in MRTB by the good agreement between the calculated results and the experimental results,which are obtained on a MRTB prototype designed to break about 5 kA of DC current.Both kinds of the results show that the current oscillation starts at about 16.5 ms and the total arc time is about 24 ms with a commutation capacitor bank of 72 μF and an inductor of 173 μH.With a further analyze on how circuit parameters influence arc current oscillations,this study helps to improve the current interruption capability of MRTB.This paper presents a numerical study of the current self-excited oscillations during the opening of high voltage direct current （HVDC） metallic return transfer breaker （MRTB）. The switching arc is simulated using the magneto-hydrodynamics （MHD） theory coupled with the electric circuit variation. The simulation is proved accurate in simulating the current oscillation and the commutation process in MRTB by the good agreement between the calctdated restdts and the experimental results, which are obtained on a MRTB pro- totype designed to break about 5 kA of DC current. Both kinds of the results show that the current oscillation starts at about 16.5 ms and the total arc time is about 24 ms with a commutation capacitor bank of 72 μF and an inductor of 173 pH. With a further analyze on how circuit parameters influence arc current oscillations, this study helps to improve the current interruption capability of MRTB.

关 键 词：双筒望远镜 数值模拟 自激振荡 直流输电 开关电流 热感应 磁流体动力学 开关电弧 

分 类 号：TM721.1[电气工程—电力系统及自动化] TH743[机械工程—光学工程]