AC loss properties of a 1 MVA single-phase HTS power transformer

Iwakuma, Masataka; Funaki, K.; Komori, Kazuhiro; Tanaka, Hideki; Bohno, T.; Tomioka, Akihiro; Yamada, Hisao; Nose, S.; Konno, Masayuki; Yagi, Y.; Maruyama, Hiroshi; Ogata, Takayuki; Yoshida, Shigeru; Ohashi, Kazuhito; Tsutsumi, K.; HONDA, Kazuo

doi:10.1109/77.920054

Cited by 78 publications

(31 citation statements)

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“…T O estimate the ac loss in Bi-2223 superconducting windings of a 1000 kVA liquid nitrogen cooled transformer and a conduction-cooled pulse coil, we proposed the following procedure [1], [2]. We first measured the ac losses in Bi-2223 superconducting strands exposed to external magnetic fields in the parallel and perpendicular direction to the wide surface.…”

Section: Introductionmentioning

confidence: 99%

Field angle dependence of AC losses in stacked Bi-2223 Ag-sheathed tapes

Fukuda

Toyota

Komori

et al. 2003

IEEE Trans. Appl. Supercond.

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In case of applying oxide superconducting tapes to power devices, they are usually stacked face-to-face to form a parallel conductor for the enlargement of current capacity. The accurate estimation of ac losses in the stacked tapes is very important for the basic design of the superconducting devices.In this study, we discuss the angular dependence of the ac losses in the stacked Bi-2223 Ag-sheathed tapes exposed to an external ac magnetic field. First we measure the ac losses in the nontwisted Bi-2223 tapes using a saddle-shaped pickup coil. The experimental results show that the ac losses observed in the transverse magnetic field, whose direction has any angle with respect to the wide face of the tapes, can be well reproduced by a simple summation of the parallel-and perpendicular-field losses. Next we compare the measured ac losses with theoretical ones, which were predicted from the critical current characteristics of a short sample observed in dc magnetic fields.

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Section: Introductionmentioning

confidence: 99%

Field angle dependence of AC losses in stacked Bi-2223 Ag-sheathed tapes

Fukuda

Toyota

Komori

et al. 2003

IEEE Trans. Appl. Supercond.

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“…8). The major technological targets of the HTS transformer are listed in Table 4 and the fundamental research of HTS transformer has been done [7,8].…”

Section: Outlinementioning

confidence: 99%

Development of YBCO power devices in Japan

Fujiwara

Hayashi

Nagàya

et al. 2010

Physica C: Superconductivity and its Applications

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“…The HTS transformer was connected to a distribution line at Imajuku substation (Kyushu Electric Power Co. Inc.). The test results revealed the HTS power transformer's applicability to a power grid network [1,2].…”

Section: Introductionmentioning

confidence: 97%