Development and test in grid of 630 kVA three-phase high temperature superconducting transformer

doi:10.1007/s11460-009-0010-5

Front Elect Electr Eng Chin

2009, Vol. 4

Issue (1) : 104-113 https://doi.org/10.1007/s11460-009-0010-5

RESEARCH ARTICLE

Development and test in grid of 630 kVA three-phase high temperature superconducting transformer

Yinshun WANG¹(

), Xiang ZHAO², Junjie HAN², Huidong LI¹, Yin GUAN¹, Qing BAO¹, Xi XU¹, Shaotao DAI¹, Naihao SONG¹, Fengyuan ZHANG¹, Liangzhen LIN¹, Liye XIAO¹

1. Institute of Electrical Engineering, Chinese Academy of Sciences, Haidian District, Beijing 100080, China; 2. Technical Center of Tebian Electric Apparatus Stock Co., Ltd, Changji 831100, China

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Abstract

A 630-kVA 10.5 kV/0.4 kV three-phase high temperature superconducting (HTS) power transformer was successfully developed and tested in a live grid. The windings were wound by hermetic stainless steel-reinforced multi-filamentary Bi2223/Ag tapes. The structures of primary windings are solenoid with insulation and cooling path among layers, and those of secondary windings consist of double-pancakes connected in parallel. Toroidal cryostat is made from electrical insulating glass fiber reinforced plastics (GFRP) materials with room temperature bore for commercial amorphous alloy core with five limbs. Windings are laid in the toroidal cryostat so that the amorphous core operates at room temperature. An insulation technology of double-half wrapping up the Bi2223/Ag tape with Kapton film is used by a winding machine developed by the authors. Fundamental characteristics of the transformer are obtained by standard short-circuit and no-load tests, and it is shown that the transformer meets operating requirements in a live grid.

Keywords high temperature superconducting (HTS) transformer Bi2223/Ag tape amorphous-alloy windings liquid nitrogen

Corresponding Author(s): WANG Yinshun,Email:yswang@ncepu.edu.cn

Issue Date: 05 March 2009

Cite this article:

Yinshun WANG,Xiang ZHAO,Junjie HAN, et al. Development and test in grid of 630 kVA three-phase high temperature superconducting transformer[J]. Front Elect Electr Eng Chin, 2009, 4(1): 104-113.

URL:

https://academic.hep.com.cn/fee/EN/10.1007/s11460-009-0010-5
https://academic.hep.com.cn/fee/EN/Y2009/V4/I1/104

Tab.1 Specifications of amorphous core

Tab.2 Specifications of Bi-2223 HTS tape

Fig.1 Machine for winding insulation of HTS tape. (a) Winding apparatus; (b) wound insulation of HTS tape

Fig.2 Breakdown voltage between turns

Fig.3 Breakdown voltage between layers

Tab.3 Main geometrical parameters of HTS windings

Fig.4 Overview of single phase transformer winding

Fig.5 Schematic view of GFRP Dewar

Fig.6 Photograph of GFRP Dewar

Fig.7 Optimized cross-section of current lead

Tab.4 Main design parameters of HTS transformer

Fig.8 Overview of HTS transformer

Tab.5 DC resistances of HTS windings

Tab.6 Main parameters of HTS transformer

Fig.9 HTS transformer operation field serving TBEA cable manufacture plant (Changji, Xinjiang)

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