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Experimental investigation on frequency-dependent critical current of HTS tapes |
Changhui DAI, Yinshun WANG( ), Xiaojie ZHANG, Weijie ZHAO, Xiao LI |
State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, Beijing 102206, China; Key Laboratory of HV and EMC Beijing, Beijing 102206, China; North China Electric Power University, Beijing 102206, China |
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Abstract Based on characteristics of alternating current (AC) critical current of high temperature superconducting (HTS) tapes on the frequency, this paper focuses on AC voltage-current (U-I) behaviors of two kinds of high temperature superconducting tapes, by which BSCCO and YBCO carrying different frequency AC currents are tested in liquid nitrogen temperature of 77 K. It is shown that the AC U-I characteristic curves of different tapes consist of two parts, that is, the resistive part and the hysteresis part. Additionally, the n values of the two parts and the relationship between AC critical current and frequency are obtained through experiments. The experimental results agree with calculated ones well, which is useful for the application of HTS tapes to power technology.
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Keywords
high temperature superconducting (HTS) tape
alternating current (AC) critical current
n value
frequency
AC voltage-current (U-I) behavior
four-probe technique
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Corresponding Author(s):
WANG Yinshun,Email:yswang@ncepu.edu.cn
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Issue Date: 05 December 2012
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