Electrical-Thermal-Structural Coupled Finite Element Model of High Temperature Superconductor for Resistive Type Fault Current Limiters

Quench behavior of high-temperature superconductor (RE)Ba2Cu3O x CORC cable

“…During a local quench, the resistance of the superconducting layer in the normal zone increases dramatically, and some currents are forced out to flow into metallic layers. In this situation, the REBCO conductor is equivalent to two parallel resistances: the resistance of superconducting layers R su and that of the metallic layers R m , as shown in figure 3(c) [45][46][47][48]. The governing equation of this equivalent circuit can be derived from Kirchhoff's law:…”

“…The equivalent homogenous thermal conductivity k and heat capacity C p are applied to the thin shell. They are calculated as parallel thermal resistances using the following formulas [46][47][48]:…”

Superconductor Stability Against Quench and Its Correlation with Current Propagation and Limiting

“…in [3][4][5]; there are more numerous reports that apply the same simplifying assumption. But there are another four shortages of traditional stability models:…”

“…Stability function and maximum zero-loss current, I max (t), accordingly can reasonably be calculated from (4a, 4b) and (5) only for Ohmic resistance states (as was done in [8-11]) or, approximately, if there are only few elements that show flux flow resistance. If flux flow resistance would strongly contribute to total resistance, the procedure using (4a, 4b) and (5) is no longer applicable. This is illustrated in Fig.…”