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Patent Searching and Data


Title:
LINE PROTECTION TRAVELING WAVE DISTANCE MEASUREMENT METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/072913
Kind Code:
A1
Abstract:
A line protection traveling wave distance measurement method and apparatus. The method comprises: performing fault detection according to collected power frequency data and traveling wave data, and determining whether to perform protection starting and traveling wave starting; in response to the protection starting and the traveling wave starting, carrying out protection distance measurement, and calculating a traveling wave head moment according to protection phase selection; performing traveling wave distance measurement according to a traveling wave head moment of a local end, traveling wave parameters and a traveling wave head moment of an opposite end of a collected line; and comparing all distance measurement results, and selecting the optimal result as the final distance measurement result. According to the method and apparatus, the protection starting and traveling wave starting are combined, that is, subsequent distance measurement is performed only when the protection starting and the traveling wave starting are both started, thereby effectively preventing the coverage of valid data caused by data storage triggered by frequent starting; moreover, traveling wave distance measurement is performed on the basis of the protection phase selection, thereby reducing the complexity of traveling wave distance measurement, and improving the stability.

Inventors:
HONG FENG (CN)
WU TONGHUA (CN)
YAO GANG (CN)
CHEN GUOZHOU (CN)
ZHENG XIAOJIANG (CN)
Application Number:
PCT/CN2019/120476
Publication Date:
April 22, 2021
Filing Date:
November 25, 2019
Export Citation:
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Assignee:
NARI TECHNOLOGY CO LTD (CN)
NARI NANJING CONTROL SYSTEM CO LTD (CN)
NARI GROUP CORP (CN)
International Classes:
G01R31/08; H02H7/26
Attorney, Agent or Firm:
NANJING ZONGHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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