Title:
CABLE BUFFER LAYER DEFECT DETECTION METHOD, APPARATUS, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/050659
Kind Code:
A1
Abstract:
A cable buffer layer defect detection method and apparatus, and a device. The defect detection method comprises: acquiring a length parameter, a corrugation pitch parameter, a radius parameter, and a thickness parameter of a cable, the cable comprising a shielding layer, a corrugated sleeve, and a buffer layer disposed between the shielding layer and the corrugated sleeve (S1); acquiring a first resistance value between the shielding layer and the corrugated sleeve, and calculating a second resistance value of the shielding layer according to the length parameter and the corrugation pitch parameter (S2); calculating a radial resistance value of the buffer layer according to the first resistance value and the second resistance value (S3); determining a contact angle between the corrugated sleeve and a contact critical point of the buffer layer according to the radius parameter and the thickness parameter (S4); calculating a volume resistivity of the buffer layer according to the radial resistance value and the contact angle (S5); and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the buffer layer (S6). The present defect detection method can accurately calculate the volume resistivity of a cable buffer layer, so as to accurately determine whether there is a hidden danger of ablation in the cable buffer layer according to the volume resistivity.
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Inventors:
FANG SHENGCHEN (CN)
SONG PENGXIAN (CN)
LI XU (CN)
YU YANG (CN)
ZHU MINGZHENG (CN)
MENG ZHENGZHENG (CN)
ZHOU FENGZHENG (CN)
ZHU XIAOHUI (CN)
YANG LEI (CN)
ZHANG JUN (CN)
HE CHUN (CN)
WANG NAN (CN)
XU KE (CN)
TANG QINGHUA (CN)
ZHANG CHI (CN)
WANG HAOMING (CN)
LI LONGJI (CN)
SUN CHENG (CN)
FAN WEI (CN)
SONG PENGXIAN (CN)
LI XU (CN)
YU YANG (CN)
ZHU MINGZHENG (CN)
MENG ZHENGZHENG (CN)
ZHOU FENGZHENG (CN)
ZHU XIAOHUI (CN)
YANG LEI (CN)
ZHANG JUN (CN)
HE CHUN (CN)
WANG NAN (CN)
XU KE (CN)
TANG QINGHUA (CN)
ZHANG CHI (CN)
WANG HAOMING (CN)
LI LONGJI (CN)
SUN CHENG (CN)
FAN WEI (CN)
Application Number:
PCT/CN2022/073086
Publication Date:
April 06, 2023
Filing Date:
January 21, 2022
Export Citation:
Assignee:
ELECTRIC POWER SCIENCE & RES INSTITUTE OF STATE GRID TIANJIN ELECTRIC POWER COMPANY (CN)
STATE GRID TIANJIN ELECTRIC POWER CO (CN)
STATE GRID TIANJIN ELECTRIC POWER CO (CN)
International Classes:
G01N27/04; G01N27/20; G01R31/08
Domestic Patent References:
| WO2021177127A1 | 2021-09-10 |
Foreign References:
| CN113588724A | 2021-11-02 | |||
| CN112763850A | 2021-05-07 | |||
| CN113405967A | 2021-09-17 | |||
| CN110389283A | 2019-10-29 |
Other References:
张静 等 (ZHANG, JING ET AL.): "高压电缆缓冲层轴向沿面烧蚀故障机理分析 (Analysis of Axial Ablation Failure Mechanism of Buffer Layer of High Voltage Power Cable)", 电力工程技术 (ELECTRIC POWER ENGINEERING TECHNOLOGY), vol. 39, no. 03, 28 May 2020 (2020-05-28), ISSN: 1628-2101
张玮玮 等 (ZHANG, WEIWEI ET AL.): "110 kV XLPE电缆缓冲层放电灼伤问题的理化分析与仿真研究 (Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable)", 高压电器 (HIGH VOLTAGE APPARATUS), vol. 56, no. 05, 16 May 2020 (2020-05-16), ISSN: 1001-1609
张玮玮 等 (ZHANG, WEIWEI ET AL.): "110 kV XLPE电缆缓冲层放电灼伤问题的理化分析与仿真研究 (Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable)", 高压电器 (HIGH VOLTAGE APPARATUS), vol. 56, no. 05, 16 May 2020 (2020-05-16), ISSN: 1001-1609
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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