Title:
METHOD FOR DETECTING SERVICE LIFE OF PRE-CROSSLINKED MATERIAL FOR HIGH-VOLTAGE ALTERNATING-CURRENT CABLE INSULATION
Document Type and Number:
WIPO Patent Application WO/2022/100391
Kind Code:
A1
Abstract:
A method for detecting service life of a pre-crosslinked material for high-voltage alternating-current cable insulation, comprising: taking a new pre-crosslinked material and carrying out tabletting to obtain a crosslinked polyethylene, measuring the cross-linking degree, mechanical properties and dielectric properties of the crosslinked polyethylene, and taking the measurement results as reference values; carrying out heating for accelerated aging of the pre-crosslinked material, measuring the crosslinking degree, mechanical properties and dielectric properties of a crosslinked polyethylene obtained by tabletting of the pre-crosslinked material that undergoes accelerated aging, and comparing the measurement results with the reference values; when the results fall within an error allowable range, prolonging a heating duration according to a preset step length until the results does not completely fall within the error allowable range; according to a calculation formula of a decomposition rate of a cross-linking agent and a calculation formula of the change of a half-life period along with the temperature, subtracting the step length from the heating duration and then converting into a normal-temperature duration, and obtaining the storage life of the pre-crosslinked material; and carrying out heating for accelerated aging of the pre-crosslinked material, taking the crosslinking degree, mechanical properties and dielectric properties as activity standards, and calculating the storage life of the pre-crosslinked material according to the decomposition rate and the half-life period of the crosslinking agent.
Inventors:
LI XIAOLIN (CN)
FU MINGLI (CN)
HOU SHUAI (CN)
HUI BAOJUN (CN)
ZHU WENBO (CN)
WU GUOXING (CN)
XIE HONG (CN)
CHEN XIAO (CN)
XU SHU (CN)
FENG BIN (CN)
ZHANG YIFAN (CN)
FU MINGLI (CN)
HOU SHUAI (CN)
HUI BAOJUN (CN)
ZHU WENBO (CN)
WU GUOXING (CN)
XIE HONG (CN)
CHEN XIAO (CN)
XU SHU (CN)
FENG BIN (CN)
ZHANG YIFAN (CN)
Application Number:
PCT/CN2021/125231
Publication Date:
May 19, 2022
Filing Date:
October 21, 2021
Export Citation:
Assignee:
ELECTRIC POWER RES INSTITUTE CHINA SOUTHERN POWER GRID (CN)
SHENZHEN POWER SUPPLY CO LTD (CN)
SHENZHEN POWER SUPPLY CO LTD (CN)
International Classes:
G01N25/20; G01N17/00
Domestic Patent References:
| WO2014197550A1 | 2014-12-11 |
Foreign References:
| CN112557438A | 2021-03-26 | |||
| CN110186513A | 2019-08-30 | |||
| CN104793111A | 2015-07-22 | |||
| CN111337418A | 2020-06-26 | |||
| CN109917251A | 2019-06-21 | |||
| CN105866015A | 2016-08-17 | |||
| CN111366459A | 2020-07-03 | |||
| CN105158085A | 2015-12-16 | |||
| CN108828416A | 2018-11-16 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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