Detection device and warning method for partial discharge of power cable terminal

A partial discharge detection and power cable technology, which is applied in the electric power field, can solve the problems of lack of partial discharge signal feature recognition technology, and achieve the effect of simple and easy structure

Active Publication Date: 2013-12-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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  • Claims
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Problems solved by technology

[0014] The present invention provides a power cable terminal partial discharge detection device and an early warning method for the shortcomings of the current external strong electromagn

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  • Detection device and warning method for partial discharge of power cable terminal
  • Detection device and warning method for partial discharge of power cable terminal
  • Detection device and warning method for partial discharge of power cable terminal

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Embodiment Construction

[0051] The technical solutions of the embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] Such as figure 1 As shown, a partial discharge detection device at a power cable terminal is composed of a partial discharge sampling lower computer and a partial discharge analysis upper computer connected by wireless signals; wherein, the partial discharge sampling lower computer is composed of a magnetic field sensor, an electric field sensor, and an AD module Converter, high-potential energy harvesting power supply, FPGA data processing module and the first wireless network card; wherein, the FPGA data processing module is respectively connected with the high-potential energy harvesting power supply, AD analog-to-digital converter and the first wireless network card; AD analog-to-digital conversion The device is respectively connected with the magnetic field sensor and the electric field...

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Abstract

The invention relates to the field of power technologies, and particularly to a partial discharge detection device and method of a power cable terminal. The device is composed of a partial discharge sampling lower computer and a partial discharge analyzing upper computer which are connected through wireless signals. If a partial discharge is analyzed by the IPCs to be a dangerous discharge which can lead to power cable breakdown, the partial discharge detection device of the power cable terminal can pop up a warning prompt to inform that a serious fault of the cable occurs; is the partial discharge is determined to be a potentially-dangerous discharge which cannot lead to power cable breakdown, the device pops up a warning prompt to inform that potential danger fault of the cable occurs, so that partial discharge detection and warning of the power cable can be achieved. According to the partial discharge detection device and method of the power cable terminal, an electric field sensor and a magnetic field sensor are simple in structure and easy to operate and can work normally under severe external interference; meanwhile, a power transmission line high-potential energy-gaining power source which is low in energy consumption and stable in power supply is utilized, so that not only energy is source saving achieved, but also the stability of the whole device is improved.

Description

technical field [0001] The invention specifically relates to a device and method for detecting partial discharge at a power cable terminal, and the invention relates to the field of electric power technology. Background technique [0002] The cable terminal is an important part of the cable, and it is necessary to monitor its insulation state. Most of the insulation faults of power cables come from the faults of cable terminals. According to relevant statistics, faults induced by internal insulation defects of cable accessories account for 39% of the total accidents. However, there is no good method for partial discharge detection at cable terminals. Collecting partial discharge signals through capacitive or electromagnetic coupling sensors installed on the metal shielding layer of the cable terminal has the following shortcomings: (1) There are many sources of external strong electromagnetic field interference; (2) Lack of partial discharge signal feature recognition techn...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 王伟杨凯陈胜科李富平杜家振顾杰峰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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