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Title:
ARC FLASH HAZARD CALCULATION METHOD, ARC FLASH HAZARD REDUCTION METHOD, AND FAULT DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/105017
Kind Code:
A1
Abstract:
An arc flash hazard calculation method, an arc flash hazard reduction method, and a fault detection method. According to the arc flash hazard calculation method for a multi-source power supply system, a time-phased arc current calculation method is provided according to the type composition condition of the multi-source power supply system, so as to perform time-phased arc flash accident energy and arc flash protection boundary calculation, and thus, the accuracy is higher. According to the arc flash hazard calculation method for the multi-source power supply system, a protection device responsible for tripping within a time period can be found according to the time period corresponding to the maximum arc flash accident energy, and the effect of reducing the maximum arc flash hazard can be achieved by reasonably reducing the action time limit of the protection device or modifying protection configuration. According to the fault detection method for the multi-source power supply system, when it is monitored that the real-time arc flash accident energy is greater than the maximum accident energy of a corresponding position or device, an alarm warning is generated.

Inventors:
FANG JINGHUI (CN)
DING YIMIN (CN)
GAO XIJUN (CN)
FENG JIAN (CN)
WANG SHUCHUN (CN)
HONG XIAOYAN (CN)
ZHANG BO (CN)
BAI XIAOMIN (CN)
LU QI (CN)
ZHANG LEIQIONG (CN)
WEI LING (CN)
ZHU SHOUZHEN (CN)
Application Number:
PCT/CN2020/139780
Publication Date:
May 27, 2022
Filing Date:
December 27, 2020
Export Citation:
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Assignee:
JIAXING HENGCHUANG ELECTRIC POWER DESIGN & RES INSTITUTE CO LTD (CN)
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO (CN)
BEIJING SMART CHINA ENERGY TECH DEVELOPMENT CO LTD (CN)
International Classes:
H02H7/26; G01R31/08; G01R31/12; G01R31/52; G01R31/58; H02H1/00; H02J13/00
Foreign References:
CN103168246A2013-06-19
US20140257723A12014-09-11
KR101303840B12013-09-04
Other References:
FANG JINGHUI, DING YIMIN, SUN YIFAN, GAO XIJUN, WEI LING: "Study on Calculation Method of Arc Flash Hazard", ELECTRICAL ENGINEERING, no. 8, 15 August 2020 (2020-08-15), pages 52 - 57, XP055932203, ISSN: 1673-3800
Attorney, Agent or Firm:
BEIJING JOYAN INTELLECTUAL PROPERTY OFFICE (CN)
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