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《Transactions of China Electrotechnical Society》 2007-09
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Analysis of Normalized Grille Curve in Time and Frequency Domains to Identify Magnetizing Inrush

Ma Jing Wang Zengping (North China Electric Power University Baoding 071003 China)  
A novel algorithm based on the normalized grille curve for the discrimination between inrush current and fault current is proposed. First,the singularity difference between the inrush current and internal fault is analyzed,and the grille fractal concept along with its calculation method to extract singularity characteristics is developed. Moreover,two new criteria to identify inrush current in the time and frequency domains are developed respectively in detail. The normalization of the grille curve makes the threshold has little relation with the parameter of the transformer,which has more universal meaning in the determination of the threshold. The experimental results indicate that the proposed technique is reliable during discrimination between internal faults and magnetizing inrush currents,and current transformer saturation has little influence on the technique.
【Fund】: 国家自然科学基金(50777016);; 高等学校博士学科点专项科研基金(20060079009)资助项目。
【CateGory Index】: TM711
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【References】
Chinese Journal Full-text Database 1 Hits
1 Ma Jing1 Wang Zengping1 Wu Jie2 (1. Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Under Ministry of Education North China Electric Power University Beijing 102206 China 2. Zhejiang Electric Power Design Institute Hangzhou 310014 China);A Novel Method to Rapidly Identify Inrush Current and Internal Fault Current Based on Variation Characteristic of Fundamental Current Amplitude[J];Transactions of China Electrotechnical Society;2009-06
【Citations】
Chinese Journal Full-text Database 5 Hits
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
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【Co-references】
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