Abstract
This paper describes engineering analysis and simulation results for a device intended to transfer current among parallel superconducting branches in a meshed superconducting dc system. Meshed superconducting dc systems offer unique problems of current distribution between parallel paths due to the lack of resistance. Neither resistances nor steady-state impedances can be relied upon to equalize the loading among superconducting branches, or to prevent any specific branch from exceeding its critical current and quenching. The paper describes the design and operation of a superconducting current diverter based on the creation of a normal zone in a specially designed superconducting cable section. The current diverter can operate successfully with a surprisingly small normal state resistance. The main disadvantage of these devices is the loss of energy associated with the resistance of the device when activated. These devices appear promising for both routine line operations and for current steering in meshed superconducting dc systems. >
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