超导电缆的应用系统——柔性超导直流配电环网综述

Application systems of HTS——Flexible HTS DC distribution closed-loop network: an overview

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 superconducting DC＂used to interconnect between AC power grids,which substantially increases power flow capacity between the AC grids. Another example of the application systems is the HTS AC cable application in urban distribution networks,which increases power capacity without increasing substation and underground cable space. ＂Flexible superconducting DC distribution closed-loop network＂makes use of the ＂flexible superconducting DC＂to connect two adjacent substations for the closed-loop operation,which can improve reliability,power quality and efficiency of urban distribution networks. In this paper,the development of the HTS cable application systems is reviewed,and the technical scheme of the ＂flexible HTS DC distribution closed-loop network＂is briefly analyzed.