Online monitoring and positioning system for local discharge of high-voltage cable

A high-voltage cable and partial discharge technology, which is applied in the direction of fault location and dielectric strength test, can solve the problems of low synchronization accuracy and lower data accuracy of discharge source location.

Active Publication Date: 2013-11-20
SUZHOU GUANGGE EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synchronization accuracy of this high-voltage cable partial discharge on-line monitoring and positioning system is generally not high, which wi...

Method used

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  • Online monitoring and positioning system for local discharge of high-voltage cable
  • Online monitoring and positioning system for local discharge of high-voltage cable
  • Online monitoring and positioning system for local discharge of high-voltage cable

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Embodiment Construction

[0020] Please refer to figure 1 with image 3 One embodiment provides an online monitoring and positioning system 100 for partial discharge of high-voltage cables. The high-voltage cable partial discharge online monitoring and positioning system 100 includes a plurality of sensors 110 for collecting discharge signals at different positions of the high-voltage cable 200, a monitoring terminal 120 connected to the sensor 110 through a coaxial cable, and a monitoring terminal 120 connected to the monitoring terminal 120 through an optical fiber 130. The network switch 140 and the discharge monitoring concentrator 150 connected to the network switch 140 through the optical fiber 130. The number of monitoring terminals 120 of the high-voltage cable partial discharge online monitoring and positioning system 100 is multiple. Each monitoring terminal 120 is connected to multiple sensors 110 at the same location, and each monitoring terminal is connected through an optical fiber 130. I...

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Abstract

The invention provides an online monitoring and positioning system for local discharge of a high-voltage cable. The online monitoring and positioning system comprises a plurality of sensors used for collecting discharge signals in different positions of the high-voltage cable, a plurality of monitoring terminals connected with the sensors, a network switch connected with the monitoring terminals and a discharge monitoring concentrator connected with the network switch. The monitoring terminals comprise a data acquisition unit connected with the sensors, a clock management unit, a plurality of network interfaces connected with the clock management unit, and a control processing unit connected with the data acquisition unit and the clock management unit. The control processing unit is connected with the network switch, and the monitoring terminals are connected via the network interfaces. The control processing unit is used for controlling the clock management unit by synchronizing a clock of the connected monitoring terminals via high-precision clock synchronization based on the IEEE 1588 protocol on a hardware time stamp. Therefore, the precision of synchronization of the clock of the connected monitoring terminals is high. By adopting the online monitoring and positioning system for local discharge of the high-voltage cable, the precision of finally obtained discharge source location data is high.

Description

Technical field [0001] The invention relates to the field of high-voltage cable detection, in particular to a high-voltage cable partial discharge online monitoring and positioning system. Background technique [0002] With the continuous development of power grids and the need for urban power grid transformation, the use of high-voltage cable lines in my country is increasing year by year. Practical experience shows that high-voltage cable line failure is an important cause of grid accidents and major economic losses. Therefore, accurate and timely grasp of the operating status of high-voltage cable lines is of great significance to the rational handling of hidden troubles and ensuring the stable operation of the power grid. [0003] In order to accurately and timely grasp the operating status of high-voltage cable lines, higher and higher requirements are put forward for the synchronization and real-time performance of the monitoring and control of high-voltage cable lines. At ...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/08
Inventor 姜明武陈志标张树龙韩叶祥花能贵
Owner SUZHOU GUANGGE EQUIP
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