Open AccessAnalysis of the thermal recovery of HTS cables after an overcurrent fault
Author(s) -
J. A. Demko,
Robert Duckworth,
G. Churu,
W. Hasssenzahl
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/755/1/012137
Subject(s) - overcurrent , fault (geology) , transient (computer programming) , conductor , nuclear engineering , materials science , operating temperature , refrigeration , power cable , electrical conductor , power (physics) , electrical engineering , current (fluid) , computer science , mechanical engineering , engineering , physics , geology , composite material , thermodynamics , layer (electronics) , seismology , operating system
High temperature superconducting (HTS) power transmission cables are cooled to operating temperatures typically below 80 K. A valuable feature of some HTS cables is that they can limit short-circuit fault currents, which can be more than ten times the maximum operating current of a cable. When a fault occurs the HTS wire is no longer superconducting and the heating which occurs will raise the temperature above the allowable operating point. To recover from the fault, the conductor must be cooled down before returning to service. The recovery is affected by the refrigeration system’s performance which varies with load and temperature. A transient numerical model of an HTS cable is applied to investigate the thermal recovery after a fault for some HTS cable system configurations and operating conditions.