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Fast Unrestrained Differential Protection Based on Phaselet Algorithm

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Electrical, Information Engineering and Mechatronics 2011

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 138))

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Abstract

The misoperation of differential protection caused by saturation of CT would take place during external fault of transformer. In order to solve this problem, this paper describes a fast unrestrained differential current protection algorithm based on phaselet algorithm, which relies only on sampling data of one-fourth circle. Based on the relationship between phaselet algorithm and full circle Fourier algorithm, this paper induces the linear relationship between the two algorithms. The magnitude-frequency characteristics of phaselet are analyzed and the fast protection criteria is proposed. The feasibility of the proposed algorithm is validated by the static testing and dynamic testing. The relay based on the proposed algorithm has been applied in field. The algorithm proposed has fast operation time and can be influenced by CT saturation.

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Author information

Authors and Affiliations

  1. School of Electrical and Electronics Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China

    Chuan-qi Wang, Xiang-li Deng, Zhe Zhang & Xiang-gen Yin

Authors
  1. Chuan-qi Wang
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  2. Xiang-li Deng
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  3. Zhe Zhang
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  4. Xiang-gen Yin
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Corresponding author

Correspondence to Xiang-li Deng .

Editor information

Editors and Affiliations

  1. , School of Electrical Engineering and, Henan Polytechnic University, Jiaozuo, China, People's Republic

    Xudong Wang

  2. , School of Electrical Engineering and, Henan Polytechnic University, Jiaozuo, China, People's Republic

    Fuzhong Wang

  3. , College of Elementary Education, Chongqing Normal University, Chongqing, China, People's Republic

    Shaobo Zhong

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© 2012 Springer-Verlag London Limited

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Cite this paper

Wang, Cq., Deng, Xl., Zhang, Z., Yin, Xg. (2012). Fast Unrestrained Differential Protection Based on Phaselet Algorithm. In: Wang, X., Wang, F., Zhong, S. (eds) Electrical, Information Engineering and Mechatronics 2011. Lecture Notes in Electrical Engineering, vol 138. Springer, London. https://doi.org/10.1007/978-1-4471-2467-2_132

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  • DOI: https://doi.org/10.1007/978-1-4471-2467-2_132

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  • Publisher Name: Springer, London

  • Print ISBN: 978-1-4471-2466-5

  • Online ISBN: 978-1-4471-2467-2

  • eBook Packages: EngineeringEngineering (R0)

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