A Discrimination Method of Ground Fault on Feeding Line using Current Phase Difference for AC Electrical Railway System

2021 ◽  
Vol 70 (11) ◽  
pp. 1737-1742
Author(s):  
Jihye Lee ◽  
Myung‑Hwan Min ◽  
Tae‑Pung An ◽  
Byeong‑Gon Lee
2021 ◽  
Vol 24 (2) ◽  
pp. 23701
Author(s):  
A. M. Shutovskyi ◽  
V. E. Sakhnyuk

The dependence of the current density on the phase difference is investigated considering the layered superconducting structures of a SIS’IS type. To simplify the calculations, the quasiclassical equations for the Green’s functions in a t-representation are derived. An order parameter is considered as a piecewise constant function. To consider the general case, no restrictions on the dielectric layer transparency and the thickness of the intermediate layer are imposed. It was found that a new analytical expression for the current-phase relation can be used with the aim to obtain a number of previously known results arising in particular cases.


2019 ◽  
Vol 33 (05) ◽  
pp. 1950054
Author(s):  
Hai Huang ◽  
Jian-Jiang Zhang ◽  
Xia Huang

Based on Ginzburg–Landau (GL) theory, we study the electromagnetic properties of two-band superconducting ring with a microbridge structure. The phase difference of two-order parameters in two-band superconductors satisfies the sine-Gordon equation, and from its soliton solution, the linear relation between the phase difference at both ends of the junction and total magnetic flux in the ring can be obtained. Then with the Josephson current-phase relation in the two-band superconducting microbridge, we establish the dependence of the circulating current and total magnetic flux on the applied external magnetic field. Our analysis shows that the soliton solution and the fractional flux quantization in two-band superconductors can be verified by measuring the properties of this single-junction structure.


2018 ◽  
Vol 138 (2) ◽  
pp. 64-70
Author(s):  
Hirotaka Torii ◽  
Yuji Hayase ◽  
Keisuke Yamashiro ◽  
Satoshi Matsumoto

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