Title:
METHOD FOR MODIFYING GAS DENSITY RELAY, AND GAS DENSITY RELAY HAVING ONLINE SELF-CHECKING FUNCTION AND CHECKING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/043035
Kind Code:
A1
Abstract:
A method for modifying a gas density relay, and a gas density relay having an online self-checking function and a checking method therefor, applicable to high-voltage and medium-voltage electrical devices. The gas density relay comprises a gas density relay body (1), a gas density measurement sensor, a temperature adjustment mechanism (5), an online checking contact signal sampling unit (6), and an intelligent control unit (7). The temperature adjustment mechanism (5) adjusts the temperature of a temperature compensation element (104) of the gas density relay body (1) such that the gas density relay body (1) performs a contact action. The contact action is transmitted to the intelligent control unit (7) by means of the online checking contact signal sampling unit (6). The intelligent control unit (7) measures a contact signal action value and/or return value of the gas density relay body (1) according to a density value during the contact action, and completes checking of the gas density relay. Therefore, checking of the gas density relay is completed without requiring maintenance personnel visiting a site, and in addition maintenance is not required, thereby greatly improving the reliability of a power grid, improving operation efficiency, and reducing costs.
Inventors:
JIN HAIYONG (CN)
XIA TIEXIN (CN)
HUANG XIAOBENG (CN)
GUO ZHENGCAO (CN)
CHANG MIN (CN)
WANG LELE (CN)
ZENG WEI (CN)
WU YEHONG (CN)
XIA TIEXIN (CN)
HUANG XIAOBENG (CN)
GUO ZHENGCAO (CN)
CHANG MIN (CN)
WANG LELE (CN)
ZENG WEI (CN)
WU YEHONG (CN)
Application Number:
PCT/CN2020/111247
Publication Date:
March 11, 2021
Filing Date:
August 26, 2020
Export Citation:
Assignee:
SHANGHAI ROYE ELECTRIC CO LTD (CN)
International Classes:
G01R31/327; G01N9/00; G01N9/36; G05D16/20; H01H35/26; H01H35/28
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Attorney, Agent or Firm:
SHANGHAI IPOWER LAW FIRM (CN)
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