Title:
DIRECT-CURRENT TRANSMISSION LINE PROTECTION METHOD AND SYSTEM BASED ON PURE CURRENT CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO/2021/000738
Kind Code:
A1
Abstract:
Disclosed are a direct-current transmission line protection method and system based on pure current characteristics. The direct-current transmission line protection method based on pure current characteristics comprises: collecting, at a moment k0, a line current iM(k0) of an M side of a first direct-current transmission line and collecting, at a moment k0-ts, a line current iM(k0-ts) thereof, calculating, according to the line current iM(k0) and the line current iM(k0-ts), at a moment k0, a differential value diM(k0) of a current of the side of the first direct-current transmission line, and determining whether the differential value diM(k0) of the current meets a protection enabling criteria; and insofar as, at the moment K0, the differential value diM(k0) of the current of the M side of the first direct-current transmission line meets the protection enabling criterion, enabling direct-current protection for the M side of the first direct-current transmission line, collecting a line current iM(j) of the M side of the first direct-current transmission line at a moment j and collecting, at a moment j-ts, a line current iM(j-ts) thereof, and calculating, according to the line current iM(j) and the line current iM(j-ts), a differential value diM(j) of the current of the M side of the first direct-current transmission line at the moment j.
Inventors:
ZHOU ZEXIN (CN)
LIU HUANZHANG (CN)
LV PENGFEI (CN)
CAO HONG (CN)
WANG XINGGUO (CN)
RUAN SIYE (CN)
DU DINGXIANG (CN)
LI YONG (CN)
YANG GUOSHENG (CN)
JIN MINGLIANG (CN)
LIU HUANZHANG (CN)
LV PENGFEI (CN)
CAO HONG (CN)
WANG XINGGUO (CN)
RUAN SIYE (CN)
DU DINGXIANG (CN)
LI YONG (CN)
YANG GUOSHENG (CN)
JIN MINGLIANG (CN)
Application Number:
PCT/CN2020/096763
Publication Date:
January 07, 2021
Filing Date:
June 18, 2020
Export Citation:
Assignee:
CHINA ELECTRIC POWER RES INSTITUTE COMPANY LIMITED (CN)
STATE GRID CORP CHINA (CN)
STATE GRID CORP CHINA (CN)
International Classes:
H02H7/26; G01R19/165
Domestic Patent References:
| WO2009076769A1 | 2009-06-25 |
Foreign References:
| CN110649577A | 2020-01-03 | |||
| CN106253244A | 2016-12-21 | |||
| CN106684842A | 2017-05-17 | |||
| CN101694936A | 2010-04-14 | |||
| CN101662143A | 2010-03-03 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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