Title:
ADAPTIVE DISTANCE PROTECTION METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/226316
Kind Code:
A1
Abstract:
Disclosed in the present invention are an adaptive distance protection method and system. The method comprises: extracting electrical quantity transient time domain information at a relay location; and determining a directional characteristic of a fault by utilizing the electrical quantity transient time domain information, and when the directional characteristic is determined to be a positive direction, expanding a distance protection action range, and when the directional characteristic is determined to be a negative direction, reducing the distance protection action range. The advantages of the present invention lie in that with respect to the problem of an abnormal distance protection action regarding a renewable energy station or a flexible direct-current output line, the direction of a fault is determined by utilizing electrical quantity transient time domain information at a relay location, and distance protection elements with different protection ranges are adaptively used, such that a correct distance protection action is ensured.
Inventors:
ZHENG YUPING (CN)
WU TONGHUA (CN)
HONG FENG (CN)
SUN ZHIPAN (CN)
YAO GANG (CN)
WANG XIAOHONG (CN)
DAI WEI (CN)
LI XINDONG (CN)
JIANG YUAN (CN)
ZHENG XIAOJIANG (CN)
CHEN GUOZHOU (CN)
WU TONGHUA (CN)
HONG FENG (CN)
SUN ZHIPAN (CN)
YAO GANG (CN)
WANG XIAOHONG (CN)
DAI WEI (CN)
LI XINDONG (CN)
JIANG YUAN (CN)
ZHENG XIAOJIANG (CN)
CHEN GUOZHOU (CN)
Application Number:
PCT/CN2022/131274
Publication Date:
November 30, 2023
Filing Date:
November 11, 2022
Export Citation:
Assignee:
NARI TECHNOLOGY CO LTD (CN)
NARI TECH NANJING CONTROL SYSTEMS LTD (CN)
NARI GROUP CORP (CN)
STATE GRID CORP CHINA (CN)
STATE GRID JIANGSU ELECTRIC POWER CO LTD RES INSTITUTE (CN)
NARI TECH NANJING CONTROL SYSTEMS LTD (CN)
NARI GROUP CORP (CN)
STATE GRID CORP CHINA (CN)
STATE GRID JIANGSU ELECTRIC POWER CO LTD RES INSTITUTE (CN)
International Classes:
H02H7/26; G01R31/08
Foreign References:
| CN115036892A | 2022-09-09 | |||
| CN103532110A | 2014-01-22 | |||
| CN109066620A | 2018-12-21 | |||
| CN104967104A | 2015-10-07 | |||
| JPH11262170A | 1999-09-24 |
Attorney, Agent or Firm:
NANJING ZONGHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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