备自投装置在上海超导电缆中的应用  

Application of automatic switchover device in superconducting cable project in Shanghai

作　　者：陈妍君 邓孟华 周佳卿 段若晨 陆超 姚蓉 CHEN Yanjun;DENG Menghua;ZHOU Jiaqing;DUAN Ruochen;LU Chao;YAO Rong(Shinan Power Supply Company,State Grid Shanghai Municipal Electric Power Company,Shanghai 200233,China)

机构地区：[1]国网上海市电力公司市南供电公司,上海200233

出　　处：《电气应用》2022年第7期17-21,共5页Electrotechnical Application

基　　金：国家电网公司科技项目国产公里级高温超导电缆系统关键技术及示范应用研究(520940180014)。

摘　　要：35 kV高温超导电缆示范工程已在上海启动。超导电缆需在77 K低温液氮环境中维持其超导特性,为了保护超导电缆不因温度、电流等升高而烧毁,同时提高电网的运行可靠性,超导电缆系统设计了进线备自投装置,一旦超导电缆退出运行,可以迅速切换至常规电缆为系统供电,并通过动作逻辑和时间级差的设置,实现与电网现有分段备自投装置及母差保护的配合。进线备自投装置确保了在技术创新的同时,维持电网正常运行方式及提高电网可靠性,是超导电缆示范工程的关键技术之一,为未来超导电缆的商业化运行奠定了坚实的基础。The demonstration project of 35 kV high-temperature superconducting cable has been put into operation in Shanghai.Superconducting cables need to maintain their superconducting properties in the 77 K liquid nitrogen.An automatic switchover device is designed in the superconducting cable system to protect superconducting cables from burning due to the increase of temperature or current and improve the operation reliability of power grid.Once the superconducting cable is out of operation,it can be quickly switched to the conventional cables to supply power.Through setting the action logic and time,the automatic switchover device can cooperate with the existing protection of the power grid.The automatic switchover device is a technological innovation which maintains the normal operation of the power grid and improves the reliability of the system.It is one of the key technologies in the superconducting cable demonstration project.The design and application of the automatic switchover device lay a solid foundation for the commercial operation of superconducting cables in the future.

关 键 词：超导电缆 进线备自投 保护配合 闭锁条件 

分 类 号：TM249.7[一般工业技术—材料科学与工程]