SIMULATION OF THE TRANSIENT-RESPONSE OF A HIGH-T-C SUPERCONDUCTING CURRENT LIMITER INSERTED IN AN ELECTRICAL DISTRIBUTION-SYSTEM

The ever increasing demand for electrical power leads to reinforced po wer systems. Therefore, the overcurrents resulting from contingencies such as short-circuits are increasingly higher. In order to cut these overcurrents, a system composed of a superconducting current limiter a nd a traditional breaker seems to provide a promising solution for fut ure power system operation. In this context, our aim is to analyze the transient response to a fault of a resistive type high Te superconduc ting current limiter inserted in an electrical system, In order to do this, simulations were carried out with the well-known EMTP (''Electro magnetic Transient Program''). The fault current limiter was represent ed using a preliminary tape model that includes the ac losses contribu tion and is valid for any current wave shape. This tape model was deve loped at the Swiss Federal Institute of Technology in Lausanne, using measurements of the dynamic behavior of Ag-sheathed Bi(2223) tapes pre pared by Professor Flukiger's team at the University of Geneva.