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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)
Application Number:
PCT/CN2020/111247
Publication Date:
March 11, 2021
Filing Date:
August 26, 2020
Export Citation:
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Assignee:
SHANGHAI ROYE ELECTRIC CO LTD (CN)
International Classes:
G01R31/327; G01N9/00; G01N9/36; G05D16/20; H01H35/26; H01H35/28
Foreign References:
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Attorney, Agent or Firm:
SHANGHAI IPOWER LAW FIRM (CN)
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