Title:
DISTRIBUTED DETECTION METHOD AND DETECTION SYSTEM FOR PARTIAL DISCHARGE OF POWER CABLE
Document Type and Number:
WIPO Patent Application WO/2023/019720
Kind Code:
A1
Abstract:
Disclosed in the present invention are a distributed detection method and detection system for partial discharge of a power cable. A continuous laser with a high degree of coherence is used to perform detection on a sensing optical fiber, such that a Rayleigh backscattering light signal after the detection includes positioning information of a fault, and coherent coupling is performed on the Rayleigh backscattering light signal and the continuous laser, thereby suppressing light path noise; and high-precision positioning can be performed on the position of partial discharge of a cable. The system comprises: a laser emission apparatus, a first optical fiber coupler, a second optical fiber coupler, an acousto-optic modulation apparatus, a light wave amplification apparatus, an optical fiber circulator, a sensing optical fiber, a photoelectric conversion apparatus, and an electrical signal collection and data processing apparatus. Coherent coupling is performed on Rayleigh backscattering light of the sensing optical fiber and intrinsic reference light of a continuous laser by means of a first optical fiber coupling apparatus and a second optical fiber coupling apparatus, thereby suppressing light path noise, and reducing detection error; and the Rayleigh backscattering light includes positioning information of a fault, such that the high-precision positioning of the position of partial discharge of a cable is realized.
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Inventors:
XU SHU (CN)
CHEN XIAO (CN)
WU GUOXING (CN)
ZHANG BIN (CN)
FU MINGLI (CN)
LI XIAOLIN (CN)
HOU SHUAI (CN)
HUI BAOJUN (CN)
ZHU WENBO (CN)
FENG BIN (CN)
ZHANG YIFAN (CN)
ZHAN YUNPENG (CN)
CHEN XIAO (CN)
WU GUOXING (CN)
ZHANG BIN (CN)
FU MINGLI (CN)
LI XIAOLIN (CN)
HOU SHUAI (CN)
HUI BAOJUN (CN)
ZHU WENBO (CN)
FENG BIN (CN)
ZHANG YIFAN (CN)
ZHAN YUNPENG (CN)
Application Number:
PCT/CN2021/125353
Publication Date:
February 23, 2023
Filing Date:
October 21, 2021
Export Citation:
Assignee:
SHENZHEN POWER SUPPLY CO LTD (CN)
ELECTRIC POWER RES INSTITUTE CHINA SOUTHERN POWER GRID (CN)
ELECTRIC POWER RES INSTITUTE CHINA SOUTHERN POWER GRID (CN)
International Classes:
G01R31/12
Foreign References:
| CN111623958A | 2020-09-04 | |||
| CN111609918A | 2020-09-01 | |||
| CN110793558A | 2020-02-14 | |||
| US7536102B1 | 2009-05-19 |
Other References:
CHEN HAO, XU YANG; QIAN SEN; CHEN CHUAN; GUO JINGHONG; SU LEI: "Distributed Fiber-Optic Ultrasonic Sensor Applied in Detection of Discharging Fault of Power Cable Joint", ACTA OPTICA SINICA, vol. 41, no. 3, 28 February 2021 (2021-02-28), pages 22 - 30, XP093037358, DOI: 10.3788/AOS202141.0306001
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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