CAJ | 학술논문

本文研究以多芯不锈钢加强Bi2223/Ag带材绕制的45 kVA单相高温超导变压器的交流损耗特性.变压器绕组置于具有室温孔径的环形玻璃钢杜瓦内,铁芯穿过杜瓦室温孔径以保证铁芯与绕组分离并工作于室温环境.在77 K和工频下,基于Bean模型和绕组中的磁场分布计算了绕组的交流损耗,计算结果与传统电测法和热测法测量的变压器交流损耗结果一致;表明在77K绕组中交流损耗以磁滞损耗为主,涡流损耗和耦合损耗可以忽略不计.
본문연구이다심불수강가강Bi2223/Ag대재요제적45 kVA단상고온초도변압기적교류손모특성.변압기요조치우구유실온공경적배형파리강두와내,철심천과두와실온공경이보증철심여요조분리병공작우실온배경.재77 K화공빈하,기우Bean모형화요조중적자장분포계산료요조적교류손모,계산결과여전통전측법화열측법측량적변압기교류손모결과일치;표명재77K요조중교류손모이자체손모위주,와류손모화우합손모가이홀략불계.
This paper describes the AC losses in windings of a single-phase model 45kVA (HTS) transformer woundwith stainless steel-enforced multifilamentary Bi2223/Ag tapes. The windings were placed in an electrical insulation toroidal cryostat with room temperature bore for iron core. AC losses induced in the windings were theoretically estimated based on Bean-model and magnetic field distribution, which are good agreement with the actual ones measured by conventional electrical and calorimetric methods at rated current operation and power frequency 50Hz in liquid nitrogen of 77K. Based the calculated and measured results, it is shown that the hysteretic loss in windings is dominant, the eddy current and coupling loss are negligible.