Title:
FLEXIBLE DC POWER GRID FAULT LINE ISOLATION METHOD BASED ON PRE-PERTURBATION OF DC CIRCUIT BREAKER, PROTECTION DEVICE AND SYSTEM, COMPUTER STORAGE MEDIUM AND COMPUTER PROGRAM PRODUCT
Document Type and Number:
WIPO Patent Application WO/2023/098681
Kind Code:
A1
Abstract:
Disclosed in embodiments of the present disclosure are a flexible DC power grid fault line isolation method based on pre-perturbation of a DC circuit breaker, a protection device and system, a computer storage medium, and a computer program product. According to the embodiments of the present disclosure, a fault recognition operation and a DC circuit breaker breaking operation are processed in parallel. The fault recognition operation is as follows: first performing fault area recognition, then performing fault interference recognition, and if the fault interference recognition is determined to be a fault, performing fault pole selection. The breaking operation of the DC circuit breaker is as follows: in a case that the fault occurs in the DC line generation area, controlling a corresponding DC circuit breaker to sequentially perform a first current conversion operation and a rapid mechanical switch opening operation in the breaking operation; in a case that the fault interference recognition is determined to be an interference, controlling the DC circuit breaker to perform a first current conversion reset operation; and in a case that the fault interference recognition is determined to be a fault, controlling the DC circuit breaker to perform a second current conversion operation.
Inventors:
DONG WEI (CN)
PANG HUI (CN)
GAO CHONG (CN)
PEI XIANGYU (CN)
YUAN YIJIA (CN)
CHEN LONGLONG (CN)
KONG MING (CN)
SUN ZELAI (CN)
PANG HUI (CN)
GAO CHONG (CN)
PEI XIANGYU (CN)
YUAN YIJIA (CN)
CHEN LONGLONG (CN)
KONG MING (CN)
SUN ZELAI (CN)
Application Number:
PCT/CN2022/135112
Publication Date:
June 08, 2023
Filing Date:
November 29, 2022
Export Citation:
Assignee:
STATE GRID SMART GRID RES INSTITUTE CO LTD (CN)
UNIV CHANGSHA SCI & TECH (CN)
UNIV CHANGSHA SCI & TECH (CN)
International Classes:
H02H7/26; H02H7/28; H02J3/36
Foreign References:
| CN114825284A | 2022-07-29 | |||
| CN113078619A | 2021-07-06 | |||
| CN108054736A | 2018-05-18 | |||
| JP2011055685A | 2011-03-17 |
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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