Simulation of Superconducting FCL to Protect Energy Storage in Distribution System

Abstract

Superconducting fault-current limiters (SFCLs) have been the subject of research and development for many years and offer an attractive solution to the problem of rising fault levels in electrical distribution systems.  SFCLs can greatly reduce fault currents and the damage at the point of fault, and help improve the stability of a power system. The resistance of an SFCL should be chosen to limit fault currents as much as possible. Not only does this benefit an electrical system through reduction in the potentially damaging effects of high fault currents, which is the primary purpose of the SFCL, but increasing the limitation of fault currents also has a consequence of shortening the recovery time of the SFCL by reducing the energy dissipated in the resistance of the SFCL. Superconducting fault-current limiters (SFCL) provide a new efficient approach to the reliable handling of such faults.(SCFLs) can be used for various nominal voltages and currents, and can be  adapted  to  particular  limiting  characteristics  in  case  of  short  circuits. Electrical equipment that controls high fault currents can increase the security of the network and allow power equipment to be designed more cost effectively.  The SCFL is such a device. In contrast to a high-voltage fuse it does not disconnect the line in case of a short circuit but limits the very high currents to defined values. In addition, it allows electrical interconnections of existing systems, which would not be possible without limiters .Finally, the SFCL is introduced in the higher capacity system. Thus, it is revealed that the outstanding current limiting performance of SFCL can be used to limit the fault to the level of the existing switchgear. The simulation results are presented by using Matlab/simulink software.