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New Pilot Protection Method Based on the Current Fault Component Waveform Similarity
  • +1
  • Shuping Gao,
  • Han Zheng,
  • Yue Gao,
  • Guobing Song
Shuping Gao
Xi’an Scientific and Technological University
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Han Zheng
Xi’an Scientific and Technological University

Corresponding Author:[email protected]

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Yue Gao
Xi’an University of Science and Technology
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Guobing Song
Xi'an Jiaotong University
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Abstract

In order to improve the ability of the modular multi-level converter to quickly clear and isolate faults in the multi-terminal flexible DC grid, this paper analyzes the characteristics of current faults in the multi-terminal flexible direct current grid, introduces the comprehensive distance of current fault waveform, and proposes a line protection method based on the similarity of current fault waveform. This protection method firstly uses Euclid DTW (Dynamic Time Warping) distance and entropy weight method to process electrical quantity signals, calculates the comprehensive distance of current fault waveform of two converter stations, and builds the protection criterion based on the similarity of current fault waveform. Then, the fault identification is realized by using the calculated comprehensive distance, and the fault pole identification is realized by using the ratio of comprehensive distance between positive and negative poles. Finally, PSCAD was used to build a simulation model to output the fault data under different fault conditions, and MATLAB was used to process the fault data to verify the protection algorithm. The simulation results show that the proposed method has good resistance to high resistance, and its rapidity and adaptability are further improved. The research results will provide a theoretical basis for the safe and reliable operation of flexible DC power grid.
05 May 2023Submitted to IET Generation, Transmission & Distribution
11 May 2023Submission Checks Completed
11 May 2023Assigned to Editor
24 Jun 2023Reviewer(s) Assigned
04 Jul 2023Review(s) Completed, Editorial Evaluation Pending
06 Jul 2023Editorial Decision: Revise Major
03 Aug 20231st Revision Received
05 Aug 2023Submission Checks Completed
05 Aug 2023Assigned to Editor
07 Aug 2023Reviewer(s) Assigned
17 Aug 2023Review(s) Completed, Editorial Evaluation Pending
23 Aug 2023Editorial Decision: Revise Minor
03 Sep 20232nd Revision Received
04 Sep 2023Submission Checks Completed
04 Sep 2023Assigned to Editor
04 Sep 2023Review(s) Completed, Editorial Evaluation Pending
11 Sep 2023Reviewer(s) Assigned
25 Sep 2023Editorial Decision: Accept