电力故障运行下磁偏置超导限流器超导限流单元的电-热特性分析与验证  

Analysis and Verification of Electro-thermal Characteristics of Magnetic Bias Superconducting Current Limiter Superconducting Current Limit Unit Under Power Failure Operation

作　　者：管广域 丁开忠[2] 董育军 诸嘉慧[3] 陈盼盼[3] 瞿体明[4] 韦德福 王帅 王飞鸣 杜庆庆 朱义东 GUAN Guangyu;DING Kaizhong;DONG Yujun;ZHU Jiahui;CHEN Panpan;QU Timing;WEI Defu;WANG Shuai;WANG Feiming;DU Qingqing;ZHU Yidong(Institute of Physical Science and Information Technology,AnhuiUniversity,Hefei 230601;Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031;China Electric Power Research Institute,Beijing 100192;Departmentof Mechanical Engineering,Tsinghua University,Beijing 100084;Electric Power Research Institute of State Grid Liaoning Electric Power Co.,LTD.,Shenyang 100142)

机构地区：[1]安徽大学,物质科学与信息技术研究院,合肥230601 [2]中国科学院,合肥物质科学研究院,等离子体物理研究所,合肥230031 [3]中国电力科学研究院,北京100192 [4]清华大学机械工程系,北京100084 [5]国网辽宁省电力有限公司电力科学研究院,沈阳110006

出　　处：《低温物理学报》2020年第4期185-191,共7页Low Temperature Physical Letters

基　　金：国网辽宁省电力有限公司科技项目《高温超导限流器在城市电网并网仿真及应用研究》(2019YF-63)资助的课题。

摘　　要：本文的磁偏置高温超导故障限流器(SFCL)是一种新型超导限流器,在系统出现短路故障时,发生失超现象,产生高阻抗限制短路电流,达到一定时间后断开超导单元,再由双分裂电抗器二次限流.当短路电流消失后,自动快速恢复到无阻特性,然后重新合闸投入系统运行.在SFCL并网运行前,要对并网运行中出现相间短路等故障的暂态运行特性进行分析,了解并网运行时的状况.本文利用Matlab/Simulink构建了SFCL的仿真分析模型,包含超导限流单元的等效电路模型和热模型.该模型被接入一个由Matlab/Simulink构建的10 kV电力系统模型中,用来仿真SFCL的并网运行特性.仿真结果表明了SFCL在并网运行中的效果,以及相间短路故障下失超电阻、通过电流和超导限流单元温度的变化.同时,在中国国网辽宁电力虎石台对SFCL进行了并网运行试验,得到了相间短路故障下的暂态运行特性和失超恢复时间.本文的仿真分析和试验结果,证明了该SFCL样机具备10 kV并网能力,以及快速响应、逐级限流和快速恢复能力。In this paper,the magnet biased high-temperature superconducting fault current limiter(SFCL)is a new type of superconducting current limiter.When a short-circuit fault occurs in the system,the quench phenomenon will occur,creat high impedance to limit short-circuit current,and double split reactor can also limit current.When the short-circuit current disappears,it automatically recovers to the non-resistance characteristic quickly.Before the SFCL is connected to the power grid,it is necessary to analyze the transient operating characteristics of faults such as phase-to-phase short circuits in the operation of the power grid,and understand the conditions when it is connected to the grid.This paper built a simulation analysis model of SFCL based on Matlab/Simulink,including the equivalent circuit model and quenchheat transfer model of the superconducting current limiting unit.This model was connected to a model of the 10 kV power system based on Matlab/Simulink.The simulation results of the model show the operation effect of SFCL in power grid,and the changes of quench resistance,flow current and the temperature of the superconducting current-limiting unit.At the same time,the SFCL was installed to the power grid at China State Grid Liaoning Electric Power Hushitai,and get the transient operating characteristics and quench recovery time under short-circuit faults between two phases.The simulation analysis and test results prove that the SFCL can operate in 10 kV power grid.And SFCL fast response,step-by-step limite current and fast recovery capabilities are proved.

关 键 词：SFCL 相间短路 等效电路模型 失超传热模型 暂态运行特性 

分 类 号：TM471[电气工程—电器]