AC loss study on a 3-phase HTS 1 MVA transformer coupled with a three-limb iron core  

作　　者：Yue Wu Shuangrong You Jin Fang Rodney A.Badcock Nicholas J.Long Zhenan Jiang 

机构地区：[1]School of Electrical Engineering,Beijing Jiaotong University,Beijing,China [2]Paihau-Robinson Research Institute,Victoria University of Wellington,Wellington,New Zealand

出　　处：《Superconductivity》2024年第2期1-12,共12页超导（英文）

基　　金：New Zealand Ministry of Business,Innovation and Employment(MBIE)Strategic Science Investment Fund“Advanced Energy Technology Platforms”under contract No.RTVU2004.

摘　　要：High-temperature superconducting(HTS)technology provides an alternative approach to achieve compact transformers.Addressing AC loss in the HTS winding is crucial for HTS transformer applications.Most numerical AC loss studies on HTS transformers have neglected the influence of iron cores.This work carries out an AC loss study to explore the impact of an iron core on the HTS windings in a 3-phase HTS 1 MVA transformer coupled with it.AC loss simulations for the transformer winding both with and without the iron core are conducted by adopting the three-dimensional(3D)T-A homogenization method.When the iron core is incorporated,the saturation magnetic fields of iron materials,flux diverters(FDs)with different geometries,and variations in turn spacings in the LV winding composed of Roebel cables are considered to investigate their influence on the AC loss of the transformer winding.The inclusion of the iron core leads to a 1.2%increase in AC loss for the transformer winding while simulating at the rated current.We attribute this slight difference to the non-inductive winding structure of the transformer winding,where a strong magnetic field generated in the space between the LV and HV windings effectively shields the influence of the iron core.

关 键 词：High-temperature superconducting TRANSFORMER T-A formulation AC losses Iron core Flux diverters 

分 类 号：TM41[电气工程—电器]