Title:
FLEXIBLE DIRECT-CURRENT POWER DISTRIBUTION NETWORK SINGLE-POLE GROUND FAULT RECOGNITION METHOD AND APPARATUS, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2018/153137
Kind Code:
A1
Abstract:
A flexible direct-current power distribution network single-pole ground fault recognition method and apparatus, and a computer storage medium. The method comprises: 1) acquiring a current in and a voltage to ground at a positive direct-current bus on an outlet of a converter, a current in and a voltage to ground at a negative direct-current bus, a positive current of a direct-current line connected to the positive direct-current bus and a negative current of a direct-current line connected to the negative direct-current bus (101); and 2) when the absolute value of the sum of the voltage to ground at the positive direct-current bus on the outlet of the converter and the voltage to ground at the negative direct-current bus is greater than a pre-set voltage threshold, and a differential current change rate between the current in the positive direct-current bus on the outlet of the converter and the positive current in a direct-current line connected to the positive direct-current bus, or between the current in the negative direct-current bus and the negative current in a direct-current line connected to the negative direct-current bus is greater than a pre-set current threshold, determining that a corresponding positive direct-current bus or negative direct-current bus has a single-pole ground fault (102).
Inventors:
PENG ZHONG (CN)
ZHANG AILING (CN)
LI TAI (CN)
ZHAO JING (CN)
JING XUEJI (CN)
HU YONGCHANG (CN)
CHEN PENG (CN)
ZHANG YANHAO (CN)
SU JINGUO (CN)
LI YANMEI (CN)
XIAO LONG (CN)
WU ZHANFENG (CN)
SHEN SHUAIHUA (CN)
DU SHAOLIN (CN)
LU QINGHUA (CN)
SUN PANLEI (CN)
HUO CHENGHUI (CN)
ZHENG KUNCHENG (CN)
SHAO RUIBO (CN)
ZHOU JINPING (CN)
ZHANG AILING (CN)
LI TAI (CN)
ZHAO JING (CN)
JING XUEJI (CN)
HU YONGCHANG (CN)
CHEN PENG (CN)
ZHANG YANHAO (CN)
SU JINGUO (CN)
LI YANMEI (CN)
XIAO LONG (CN)
WU ZHANFENG (CN)
SHEN SHUAIHUA (CN)
DU SHAOLIN (CN)
LU QINGHUA (CN)
SUN PANLEI (CN)
HUO CHENGHUI (CN)
ZHENG KUNCHENG (CN)
SHAO RUIBO (CN)
ZHOU JINPING (CN)
Application Number:
PCT/CN2017/114144
Publication Date:
August 30, 2018
Filing Date:
November 30, 2017
Export Citation:
Assignee:
XJ GROUP CORP (CN)
XJ ELECTRIC CO LTD (CN)
STATE GRID CORP CHINA (CN)
XJ ELECTRIC CO LTD (CN)
STATE GRID CORP CHINA (CN)
International Classes:
G01R31/08; H02H7/26
Domestic Patent References:
| WO2016156435A1 | 2016-10-06 |
Foreign References:
| CN106680670A | 2017-05-17 | |||
| CN105552947A | 2016-05-04 | |||
| CN104820157A | 2015-08-05 | |||
| CN102856881A | 2013-01-02 |
Other References:
SUN, GANG ET AL.: "Research on the Fault Location Method and Protection Configuration Strategy of MMC Based DC Distribution Grid", POWER SYSTEM PROTECTION AND CONTROL, vol. 43, no. 22, 16 November 2015 (2015-11-16), pages 127 - 133, ISSN: 1674-3415
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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