A Numerical Study on AC Losses of a Double Layer Polygonal BSCCO Conductor by Finite Element Method

Xu, Jin-Quan; Li, Z. Y.; Ryu, K.; Hwang, Si-Dole; Jin, Zhijian; Hong, Zhiyong

doi:10.1007/s10948-014-2563-7

Cited by 6 publications

(2 citation statements)

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“…ac losses are solved by using partial differential equation modes in a commercial software, COMSOL Multiphysics. A similar method has been used in our previous work [5], [9]. The dependence of the wire's critical current on the external perpendicular magnetic field is taken into consideration, as shown in Fig.…”

Section: Experiments and Numerical Modelmentioning

confidence: 99%

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A Study on AC Losses of HTS Pentagonal Conductors Consisting of 2G Wires Carrying DC Offset Transport Current

Yao

et al. 2015

IEEE Trans. Appl. Supercond.

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In a high-voltage dc (HVDC) transmission system, a high-temperature superconducting (HTS) dc cable is a feasible candidate due to its high power density. However, the dc in the grid includes ac ripple generated from switching devices and the environment, which can cause ac losses. In this paper, two pentagonal conductors consisting of second-generation (2G) wires are prepared, and their ac losses are investigated under the application of current with ac and dc components. Moreover, a numerical analysis is performed for both conductors to compare the measured losses. The results show that the measured ac losses correspond well with the numerical ones calculated by our models. The dc offset current does not affect the ac losses when the total current is smaller than the critical current, and the ac losses depend on the amplitude of the ac component. All measured losses are verified by evaluating the dependence on the arrangement of the voltage leads, the contact position, and the frequency.Index Terms-AC loss, DC offset current, finite element method, pentagonal multi-wire conductor.

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Section: Experiments and Numerical Modelmentioning

confidence: 99%

“…However, in practice, there is ac and dc mixed current in conductors, because of switching devices and the environment. There have been many studies on the ac loss characteristics of single layer or multilayer HTS conductors [1]- [5]. However, only ac transport current is considered in almost all of these studies.…”

Section: Introductionmentioning

confidence: 99%