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《Journal of Electric Power Science and Technology》 2009-04
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Correlation function based superconducting quench detection

ZHOU Yu-sheng1,KUANG Jiang-hua1,TANG Pan-long1,WEI Xiao-yan1,PENG Zhuo1,TANG Yue-jin2(1.School of Electrical Engineering and Information,Changsha University of Science and Technology,Changsha 410004,China;2.R&D Center of Applied Superconducting,Huazhong University of Science and Technology,Wuhan 430074,China)  
A quench detection method based on correlation function phase difference is proposed for high temperature superconductor in this paper.Using band-pass filter to separate the fundamental voltage and current signals from the measured signals,the harmonics interference in the correlation function is eliminated.Then the correlation operation for fundamental voltage and current signals is carried out,the phase difference is measured,and the superconducting quench detection sensitivity and anti-interference capability are thus improved significantly.MATLAB simulation results show that this method is with feasibility and high accuracy
【Fund】: 国家高技术研究发展计划(“863”计划)基金(2007AA03Z243);; 湖南省自然科学基金(07JJ3101 06JJ2044);; 湖南省科技计划基金(2007FJ3008)
【CateGory Index】: TM26
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