Abstract
The work deals with theoretical and experimental studies, aimed at increasing operational indicators of high-temperature superconducting short circuit current limiter of inductive type. We designed a high-temperature superconducting current limiter of inductive type with a superconductive screen, a superconductive winding and a core, which are placed in a general cryostat, which ensures an improvement in energy efficiency. The inductances of magnetic system of a current limiter were determined for the nominal and emergency operating modes. A special feature of the proposed procedure for the calculation of power losses in a current limiter, as well as the magnitude of heat flows to a cryostat, is the fact that the developed procedure considers design parameters of magnetic system with complete cryogenic cooling. Based on the developed procedure, we carried out analysis of the power losses of a superconducting current limiter of inductive type and heat tides to the cryostat for the nominal regime, which demonstrated that the effect of cryogenic cooling of magnetic circuit on the power of heat release of a current limiter is insignificant and amounts to less than one percent. We simulated the work of experimental model of the magnetic system of a current limiter of inductive type during cryogenic cooling with liquid nitrogen. The calculation procedure proposed makes it possible to analyze energy efficiency while determining necessary critical parameters of a superconducting current limiter. It was experimentally explored that the power losses under the nominal mode in the magnetic circuit of a superconductive current limiter of inductive type are insignificant, which corresponds to the previous theoretical calculations. The conducted experimental research confirmed theoretical positions and developed mathematical models.
Highlights
Modern advances in the field of power engineering are characterized by the emergence of the super-high classes of voltages, utilization of large unit capacities, and creation of energy complexes of high power
These factors sharpen an actual problem of limiting short circuit currents, which are among the defining parameters when choosing equipment for substations and power transmission lines
Designing superconducting fast performing energy efficient short-circuit current limiters is a very important and promising task, which focuses on the implementation of technology of high-temperature superconductors in electrical power engineering and protection of electrical networks and electric equipment from accidental short circuit currents
Summary
Doctor of Technical Sciences, Professor, с полным криогенным охлаждением магнитной системы. National Technical University “Kharkiv Polytechnic Institute” Bagaliya str., 21, Kharkiv, Ukraine, 61002
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Eastern-European Journal of Enterprise Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
