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Power cable with local discharge self-check function

A power cable and partial discharge technology, which is applied in the field of power cables, can solve problems such as high installation requirements, weak measurement sensitivity, and weak anti-interference ability, and achieve the effects of ensuring sensitivity, thin and soft optical fibers, and avoiding electromagnetic interference

Inactive Publication Date: 2019-06-28
广西电网有限责任公司桂林供电局
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Problems solved by technology

Due to the phenomenon of current pulse, ultrasonic wave, etc. when partial discharge occurs in the cable, the corresponding detection methods are divided into ultra-high frequency method and ultrasonic method according to the difference in physical quantity, both of which need to use additional sensors to collect and transmit signals. According to Different on-site installation positions are divided into external sensors and built-in sensors: external sensors are easy to install and have strong anti-interference ability, but the measurement sensitivity is relatively weak, while built-in sensors have high measurement sensitivity, but installation requirements are also high. Anti-interference ability is relatively weak

Method used

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  • Power cable with local discharge self-check function
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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0023] figure 1 , figure 2 The schematic diagrams of the transverse cross-sections of single-core and three-core power cables are shown respectively. The structural composition of single-core cables is line core conductor 1, conductor shielding layer 2, insulating layer 3, insulating shielding layer 4, and aluminum tape shielding layer from inside to outside. 5. Wrapping tape 6, sheath 7, and a spirally wound optical fiber 12 is arranged between the insu...

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Abstract

The invention relates to a power cable with a local discharge self-check function. The power cable includes a single core or three cores, and internally provided with fibers for local discharge detection for the cable. Compared with the prior art, the power cable has the advantages of easy installation, electromagnetic interference resistance and high sensitivity.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a power cable with a partial discharge self-test function. Background technique [0002] With the development of the national economy, the requirements for the reliable operation of the power system are getting higher and higher. As the carrier of power transmission, the power cable is the basic component of the power system. Users cause heavy economic losses. [0003] In order to ensure the safe operation of power cables, it is usually necessary to conduct partial discharge detection on cables. Partial discharge assessment is the electrical aging performance of cables, which can effectively reflect the insulation status of power cables, especially for early detection of sudden failures. Due to the phenomenon of current pulse, ultrasonic wave, etc. when partial discharge occurs in the cable, the corresponding detection methods are divided into ultra-high frequency method an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/00G01R31/12
Inventor 王辉毛振宇何森李方利伍振园周雄黄辉叶玉明龙宇吴颖煜
Owner 广西电网有限责任公司桂林供电局
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