为了试验超导限流储能系统(SFCL—MES)的基本原理,设计了1台220V/25A/6kW的SFCL—MES模型样机。提出了一种用于配电系统的SFCL—MES的系统结构,它由2个串联于变电站负荷的故障限流端口及1个并联于变电站母线的储能端口组成,既可以限制变电站的短路电流,又可以提高整个变电站的供电质量。分析了SFCL—MES的集成设计原理,讨论了SFCL—MES的4个组成部分:双向换流器单元、双向电流调节器单元、全波整流桥单元以及高温超导磁体单元的设计结构以及主要参数。在模型上对SFCL—MES的故障限流原理进行了试验,初步验证了它的有效性。
A 220 V/25 A/6 kW prototype of superconducting fault current limiting-magnetic energy storage (SFCL-MES) model is designed to test the basic principle of SFCL-MES. The configuration of the SFCL-MES applied to the substation of distributed system is proposed, and it consists of two fault current limiting ports connected with the loads of the substation in series, and a compensation port connected with the substation in parallel. This SFCL-MES can not only limit the fault current to protect the whole substation, but also improve the power quality for the substation. The principle of integrating design for SFCL-MES is presented, and the topology and parameters of its four parts, i.e. a hi-direction converter, a hi-direction current regulator, two full-wave rectifier bridges and an HTS magnet, are discussed. The fault current limiting principle of SFCL-MES is tested on the model, and its validity is confirmed by the experiment.