具有故障限流功能的串联型超导储能系统

串联型超导储能系统(SSMES)是一种串联于配电系统的新型超导储能系统.文中研究了应用于变电站的具有故障限流功能的SSMES.基于有源注入电压的原理,SSMES不仅可以补偿电压以提高电能质量,同时也可以快速限制故障电流以保护自身以及整个变电站系统.给出了SSMES的结构,分析了它的原理,并提出了一种用于SSMES的统一控制算法,它既可以使得SSMES向系统注入同相电压进行电压凹陷补偿,也可以使得SSMES向系统注入反向电压进行故障限流.实验结果验证了SSMES的有效性.

Study of SSMES with Fault Current Limiting Function

Series superconducting magnetic energy storage (SSMES) is a new kind of SMES, which is connected with the distribution system in series. In this paper, SSMES with fault current limiting function for substation applications is proposed. Based on the principle of active injected voltage, SSMES can compensate the voltage sags to improve power quality, and suppress the fault current very quickly to protect the substation and itself. The configuration of SSMES is presented, and its characteristics of the limiting function are analyzed. Moreover, a united control strategy is presented for SSMES not only to inject an in-phase voltage with power source to compensate the voltage sag, but also to inject an out-of-phase voltage with power source to limit the fault current. The effectiveness of SSMES is confirmed by the experimental test.