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Patent Searching and Data


Title:
LINE DOUBLE-END STEADY-STATE QUANTITY DISTANCE MEASURING METHOD AND SYSTEM BASED ON AMPLITUDE-COMPARISON PRINCIPLE
Document Type and Number:
WIPO Patent Application WO/2021/143072
Kind Code:
A1
Abstract:
A line double-end steady-state quantity distance measuring method and system based on an amplitude-comparison principle. According to the method and system, voltage values and current values of both sides of a line before and after a fault are collected (102), a voltage variable quantity and a current variable quantity of both sides of the line are calculated (103), and after a voltage phasor value and a current phasor value are determined according to the voltage variable quantity and the current variable quantity (104), the position of a short-circuit point is determined by performing iterative calculation on the voltage of the short-circuit point. The method is simple in principle, and can accurately recognize a fault point, achieving precise distance measurement of lines.

Inventors:
GUO YARONG (CN)
WANG XINGGUO (CN)
ZHOU ZEXIN (CN)
LIANG YING (CN)
YANG GUOSHENG (CN)
LIU HUANZHANG (CN)
DU DINGXIANG (CN)
LI YONG (CN)
WANG SHUYANG (CN)
CHENG QI (CN)
CAO HONG (CN)
CHEN ZHENGGUANG (CN)
Application Number:
PCT/CN2020/100844
Publication Date:
July 22, 2021
Filing Date:
July 08, 2020
Export Citation:
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Assignee:
CHINA ELECTRIC POWER RES INSTITUTE COMPANY LIMITED (CN)
STATE GRID CORP CHINA (CN)
International Classes:
G01R31/08
Foreign References:
CN109633367A2019-04-16
CN111141995A2020-05-12
CN109901024A2019-06-18
CN105652147A2016-06-08
CN108919051A2018-11-30
CN108092244A2018-05-29
US20110264388A12011-10-27
CN109283430A2019-01-29
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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