Analysis of perpendicular magnetic fields on a 1 MVA HTS transformer windings with flux diverters
Analysis of perpendicular magnetic fields on a 1 MVA HTS transformer windings with flux diverters
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DOI：
10.1109/tasc.2004.830322
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发表时间：
2004-08
影响因子：
1.8
通讯作者：
S. Kim;W.S. Kim;W. Min;C. B. Park;S.J. Lee;J.T. Kim;D.K. Lee;K. Choi;H. Joo;G. Hong;J. Han;S. Hahn
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文献类型：
--
作者：
S. Kim;W.S. Kim;W. Min;C. B. Park;S.J. Lee;J.T. Kim;D.K. Lee;K. Choi;H. Joo;G. Hong;J. Han;S. Hahn
在具有双扁平绕组的高温超导（HTS）变压器中，施加在双扁平绕组的HTS带上的漏磁通密度（B/sub r/）的垂直分量大于螺线管绕组的垂直分量，这导致HTS带上的临界电流降低并增加交流损耗。在本文中，为了减少应用于高温超导绕组的B/sub r/，提出了使用铁氧体磁通分流器。磁通分流器位于初级绕组和次级绕组之间，并且必须由低损耗材料制成，以最大限度地减少热量。并完成了单相 1 MVA 22.9 kV/6.6 kV HTS 变压器的电磁分析，该变压器在 HTS 绕组中装有磁通分流器。通过分别改变磁通转向器的相对磁导率，分析了施加到次级绕组的B/sub r/和磁通转向器中的磁通密度的变化。选择磁通分流器的合适相对磁导率以减少应用于高温超导绕组的B/sub r/，考虑磁通分流器中B增加造成的磁通分流器损耗。
In high temperature superconducting (HTS) transformer with double pancake windings, the perpendicular component of leakage magnetic flux density (B/sub r/) applied to HTS tapes of double pancake windings is larger than that of solenoid windings, which acts as a cause to decrease the critical current in HTS tape and increase AC loss. In this paper, in order to reduce the B/sub r/ applied to HTS windings, the use of ferrite flux diverters is presented. Flux diverters are located in between the primary windings and the secondary windings, and must be made of low-loss materials to minimize the heat. And electromagnetic analysis of a single-phase 1 MVA 22.9 kV/6.6 kV HTS transformer with flux diverters in HTS windings was accomplished. The variation of B/sub r/ applied to the secondary windings and magnetic flux density in flux diverters were analyzed by changing their relative permeability of flux diverters respectively. Suitable relative permeability of flux diverters to reduce B/sub r/ applied to HTS windings was selected, considering flux diverter losses by increment of B in flux diverters.