超导电缆的应用系统——柔性超导直流配电环网综述

摘要

进入2010年代后,高温超导电缆技术呈现出从单机设备到应用系统的发展新趋势.最具代表性的应用系统一方面是以"柔性超导直流"实现交流电网之间的互联,大幅度提高交流电网之间的潮流容量;另一方面则是将超导交流电缆应用于城市配电网,在不增加变电站及地下电缆沟道的场地空间前提下实现"扩容"."柔性超导直流配电环网"则是利用"柔性超导直流"将城市临近两座变电站连接起来形成闭环运行模式,以提高城市配电网的安全可靠性及供电质量和效率.本文对高温超导电缆应用系统的发展进行综述,对"柔性超导直流配电环网"的技术方案进行简要分析.%Since 2010,the high-temperature superconducting(HTS)cable technology has a developing trend from stand-alone equipment to application systems.The most representative application system is the"flexible supercon-ducting DC"used to interconnect between AC power grids, which substantially increases power flow capacity be-tween the AC grids.Another example of the application systems is the HTS AC cable application in urban distribu-tion networks,which increases power capacity without increasing substation and underground cable space."Flexi-ble superconducting DC distribution closed-loop network"makes use of the"flexible superconducting DC"to con-nect two adjacent substations for the closed-loop operation, which can improve reliability, power quality and effi-ciency of urban distribution networks.In this paper,the development of the HTS cable application systems is re-viewed,and the technical scheme of the"flexible HTS DC distribution closed-loop network"is briefly analyzed.