Interruption Characteristics of High-speed Switches in 500 kV Fault Current Limiter with High Coupled Split Reactance  

作　　者：Yanzhe Zhang Shixin Xiu Qiang Tang Shenli Jia Bo Chu Wenxiong Mo Yong Wang Haibo Su 

机构地区：[1]State Key Laboratory of Electrical Insulation and Power Equipment,the School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China. [2]Test and Research Institute of Guangzhou Power Supply Company Ltd.,Guangzhou 510410,China.

出　　处：《CSEE Journal of Power and Energy Systems》2023年第4期1577-1584,共8页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by the National Key R&D Program of China(2018YFB0904300)。

摘　　要：A 500 kV high-voltage AC fault current limiter(FCL)based on a high coupled split reactor(HCSR)is pro-posed by the National key R&D project team.Low impedance under normal conditions and high impedance under short-circuit conditions are accomplished by the cooperation of HCSR and high-speed switches.High-speed switches play an important role in current limiting processes,thus interruption characteristics of the high-speed switch in the 500 kV FCL are studied in this paper.The simulation model of the FCL and the external equivalent power grid are established.The short-circuit current and recovery voltage characteristics of the high-speed switch in FCL are simulated.The results show that maximum DC component of the short-circuit current of the high-speed switch reaches 91%,the maximum peak value is 118 kA,and the longest arcing time is 14.8 ms.There is a discontinuity in the curve of the short-circuit current peak and arcing time as a function of the short-circuit occurrence time;the peak recovery voltage of a single break of the high-speed switch has a maximum value of 87.5 kV under a three-phase ungrounded short-circuit condition,and the rate of rise of recovery voltage is o.22 kV/s.The recovery voltage peak shows a period change with the short-circuit occurrence time,and the period is 10 ms.The effects of the shunt capacitor value and short-circuit ground resistance on the recovery voltage of high-speed switching are also studied.The research can be used for reference by R&D personnel and testersof500kVFCLs.Index Terms-Fault current limiter(FCL),high coupled split reactor(HCSR),high-speed switch,interruption characteristics,short circuit current.

关 键 词：Fault current limiter(FCL) high coupled split reactor(HCSR) high-speed switch interruption characteristics short circuit current. 

分 类 号：TM721.1[电气工程—电力系统及自动化]