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Cable partial discharge positioning system and method based on travelling wave principle

A partial discharge and positioning system technology, which is applied in the direction of fault location and dielectric strength test, can solve the problems of unguaranteed accuracy, long fault location time, secondary cable damage, etc., and achieve fast data processing speed and short positioning time , easily acceptable effect

Inactive Publication Date: 2015-11-25
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

The main problem is that it takes a long time to locate the fault, and it may cause secondary damage to the cable, and it cannot guarantee 100% accuracy. Therefore, the existing power cable partial discharge location technology requires a specific synchronization method or a pulse transceiver. High resource consumption and low positioning accuracy

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  • Cable partial discharge positioning system and method based on travelling wave principle
  • Cable partial discharge positioning system and method based on travelling wave principle
  • Cable partial discharge positioning system and method based on travelling wave principle

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Embodiment Construction

[0048] Figure 1~5 It is the best embodiment of the present invention, below in conjunction with attached Figure 1~5 The present invention will be further described.

[0049] Such as figure 1 As shown, the cable partial discharge positioning system based on the principle of traveling waves includes traveling wave acquisition devices 4 installed at both ends of the cable line 1: M end and N end respectively, and each traveling wave acquisition device 4 is equipped with a GPS time synchronization device 5. The traveling wave acquisition device 4 at both ends of the cable line 1 and the traveling wave positioning master station 3 are connected through the communication network 2 .

[0050] When a fault occurs in the monitored cable line 1, the traveling wave acquisition device 4 at both ends of the cable line 1 detects the traveling wave pulse, and when the traveling wave acquisition device 4 at both ends of the cable line 1 detects the arrival time of the traveling wave pulse...

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Abstract

Provided is a cable partial discharge positioning system and method based on the travelling wave principle. A cable line (1) is included. The system is characterized in that the two ends of the cable line (1) are respectively provided with travelling wave collectors (4) which are used for collecting travelling wave pulse signals, the travelling wave collector (4) at each end is connected with a time synchronization unit used for time synchronization, and the travelling wave collectors (4) at the two ends of the cable line (1) are connected via a communication network (2). According to the system, the travelling wave collectors are used for collecting fault travelling-wave pulse waveforms in the cable line, and time synchronization signals provided by a GPS time synchronization device are used to accurately determine fault points, so that positioning time is short, and the cable line is prevented from secondary damage.

Description

technical field [0001] The invention relates to a cable partial discharge positioning system and a positioning method based on the principle of traveling waves, which belong to the technical field of power system automation. Background technique [0002] Power cable fault location technology helps to greatly reduce the workload of finding and even repairing cable faults, thereby improving the power supply reliability of power cables. With the development of modern urban construction, the city's electricity load continues to increase, and the existing overhead lines can no longer meet the needs of urban development, and the criss-cross overhead lines also affect the overall image of the city. Therefore, replacing the original overhead line power supply with cable network power supply has become an inevitable trend in the development of urban power grids, and the demand for fast and accurate power cable fault location technology in the power sector is becoming more and more ur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/08
Inventor 郑蜀江秦红三辛建波范瑞祥孙佳李录照
Owner STATE GRID CORP OF CHINA
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