变阻抗高温超导限流器的限流特性研究  

Research on current limiting characteristics of variable impedance superconducting current limiter

作　　者：宋萌 李力 张琦[2] 项彬[2] 袁仲滨 刘志远[2] 王建华[2] SONG Meng;LI Li;ZHANG Qi;XIANG Bin;YUAN Zhongbin;LIU Zhiyuan;WANG Jianhua(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]电工材料电气绝缘全国重点实验室,西安交通大学,陕西西安710049

出　　处：《电工电能新技术》2024年第8期87-95,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：南方电网有限公司科技项目(GDKJXM20222112)。

摘　　要：超导限流器在系统短路限流中具有良好的应用前景,但是电阻型超导限流器在深度限流后难以快速恢复,针对此问题本文提出了交流系统中的一种基于组合超导线圈的变阻抗超导限流器,能在增大限流率的同时显著缩短主通流支路超导带材的通流时间。基于单根超导带材的实验结果在Simulink中依次建立了单根超导带材和变阻抗超导限流器的R-Q仿真模型,仿真分析了变阻抗超导限流器的限流性能和恢复性能,并通过实验验证了仿真结果的准确性,最后在10 kV交流电力系统中分析了变阻抗超导限流器的限流效果。结果显示,本方案超导限流器的主通流和主限流线圈带材根数之比为2∶1时,限流阻抗能增大到常规超导限流器的3倍以上,能有效提高电力系统的稳定性。Superconducting fault current limiters have shown great prospects in power system short-circuit current limiting.However,the recovery time of resistive type superconducting fault current limiters(R-SFCL)after current limiting is too long to satisfy the demand of reclosing.To solve the problem,a variable impedance superconducting current limiter(VI-SFCL)based on composite superconducting coils is proposed,which can greatly shorten the recovery time of the main current carrying superconducting tape while increasing the current limiting rate.Based on the experimental results of a single superconducting tape,R-Q simulation models of a single superconducting tape and a VI-SFCL were established in Simulink.The current limiting and recovery performance of the VI-SFCL were analyzed,and the accuracy of the simulation results was verified through experiments.Finally,the effects of the variable impedance superconducting current limiter were analyzed in a 10 kV AC power system.The results show that when the parallel quantity between flowing branch and limiting branch is 2∶1,the current limiting impedance of VI-SFCL can be increased by more than three times that of conventional R-SFCL,which can improve the stability of the power system.

关 键 词：组合超导线圈 变阻抗 限流阻抗 快速恢复 

分 类 号：TM471[电气工程—电器]