HTS Transformer: Construction Details, Test Results, and Noted Failure Mechanisms

An experimental high temperature superconducting transformer has been designed and built using Bi2223 HTS tape. The transformer is unique in that the magnetic circuit is comprised of air and a silicon steel partial core. Electrical tests were performed on the transformer and it was found to be 98.6% efficient at full load. The transformer failed during a full load endurance run and an investigation was carried out to determine the cause of the failure. The cause was believed to be from operating the HTS windings close to critical conditions. Presentation of the failure details will be of use to other researchers who are building HTS transformers.

[1]  Peter Massek,et al.  Development and test of a 100 kVA superconducting transformer operated at 77 K , 2000 .

[2]  Pat Bodger,et al.  An Experimental High Temperature Superconducting Transformer: Design, Construction and Testing , 2010 .

[3]  Pat Bodger,et al.  Lightning Arc Drawings - Dielectric Barrier Discharges for Artwork , 2007 .

[4]  Pat Bodger,et al.  Applying a reverse design modelling technique to partial core transformers , 2003 .

[5]  Jianxun Jin,et al.  Development of HTS transformers , 2008, 2008 IEEE International Conference on Industrial Technology.

[6]  Martino Leghissa,et al.  Modelling and measurement of ac loss in BSCCO/Ag-tape windings , 2003 .

[7]  Pat Bodger,et al.  Towards a usable mains frequency partial core transformer , 2002 .

[8]  Pat Bodger,et al.  Reverse As-Built Transformer Design Method , 2002 .

[9]  Pat Bodger,et al.  The performance of silicon and amorphous steel core, distribution transformers at ambient and cryogenic temperatures , 2002 .

[10]  W. Goldacker,et al.  Electromechanical and Thermal Properties of Bi2223 Tapes , 2007, IEEE Transactions on Applied Superconductivity.

[11]  Pat Bodger,et al.  Electro-mechanical testing of a liquid nitrogen filled power transformer , 2000 .

[12]  Z. Han,et al.  Field dependent critical current of Bi-2223/Ag tapes at different thermo-mechanical stages , 2004 .

[13]  Pat Bodger,et al.  A comparison of conventional and reverse transformer design , 2000 .

[14]  Minwon Park,et al.  Investigation of the Over Current Characteristics of HTS Tapes Considering the Application for HTS Power Devices , 2008, IEEE Transactions on Applied Superconductivity.

[15]  Simon Colin Bell,et al.  High-voltage partial-core resonant transformers , 2008 .

[16]  Pat Bodger,et al.  Testing full-core and partial-core transformers at ambient and cryogenic temperatures , 2002 .

[17]  Pat Bodger,et al.  Partial-core transformer design using reverse modelling techniques , 2001 .

[18]  Pat Bodger,et al.  A low-voltage, mains frequency, partial core, high temperature, superconducting transformer , 2005 .

[19]  H.-W. Neumuller,et al.  Bi-2223 multifilament tapes and multistrand conductors for HTS power transmission cables , 1997, IEEE Transactions on Applied Superconductivity.