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

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 ...

AI Technical Summary

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 will reduce the accuracy of the discharge source position data finally obtained by the high-voltage cable partial discharge on-line monitoring and positioning system

Images