磁通约束型超导限流开关对电力系统的影响研究  

Research on influence of flux-coupling superconducting fault current limiting switch on power system

作　　者：张宇 任丽[2] 曹智伟 严思念 徐颖[2] 石晶[2] 李敬东[2] Zhang Yu;Ren Li;Cao Zhiwei;Yan Sinian;Xu Ying;Shi Jing;Li Jingdong(Marketing Service Center(Metrology Center),State Grid Tianjin Electric Power Company,Tianjin 300210,China;R&D Center of Applied Superconductivity,State Key Lab.of AEET,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网天津市电力公司营销服务中心(国网天津市电力公司电能计量中心),天津300210 [2]华中科技大学强电磁工程与新技术国家重点实验室,超导中心,武汉430074

出　　处：《低温与超导》2020年第12期37-41,共5页Cryogenics and Superconductivity

基　　金：国家电网公司科技项目(SGTYHT/16-JS-198)资助。

摘　　要：随着我国电力系统规模逐步扩大,短路电流水平日益增高,已超过现有商用断路器的开断容量。如何将短路电流限制在现有断路器开断水平,是当前电力系统面临的一个重要问题。磁通约束型超导限流开关采用超导耦合电感与并联断路器结构,可有效限制电网短路电流,提升整体开断水平。介绍了磁通约束型超导限流开关的基本工作原理,综合考虑超导耦合电感的失超特性,研究了其对电力系统继电保护和暂态稳定性的影响,并基于Matlab/Simulink软件搭建了含限流开关的220 kV电力系统仿真模型进行仿真验证。With the gradual expansion of the power system in China, the level of short circuit current has been increasing, which exceeds the breaking capacity of existing commercial circuit breakers.How to limit the short circuit current to the breaking level of circuit breakers is an important issue in the power system.Flux-coupling superconducting fault current limiting switch(FC-SFCLS) adopts a superconducting coupling inductance and the structure of parallel circuit breaker, which can effectively limit the level of short circuit current in the power grid and improve the overall breaking level.This paper introduced the basic working principle of FC-SFCLS,and studied its influence on the relay protection and transient stability of the power system considering quenching characteristics of superconducting coupling inductance.A 220 kV power system simulation model with current-limiting switch was built for simulation verification in Matlab/Simulink softwares.

关 键 词：短路电流 磁通约束型超导限流开关 继电保护 暂态稳定性 

分 类 号：TM26[一般工业技术—材料科学与工程]