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Novel cable oscillation wave partial discharge detection system

A partial discharge detection and oscillatory wave technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as unsatisfactory cable detection effects, achieve the effects of increasing the length range, improving measurement accuracy, and good measurement results

Inactive Publication Date: 2016-03-09
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the object of the present invention is to provide a new type of cable oscillatory wave partial discharge detection system, which can effectively overcome the problem of unsatisfactory detection effect on cables with too short length and too long length in the prior art.

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  • Novel cable oscillation wave partial discharge detection system
  • Novel cable oscillation wave partial discharge detection system
  • Novel cable oscillation wave partial discharge detection system

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to figure 1 , a new type of cable oscillatory wave partial discharge detection system, the invention is characterized in that it includes a DC high voltage device 1, an IGBT high voltage switch 2, a resonant inductor 3, a capacitor voltage divider 4, a monitoring background 5, a compensation capacitor 6, and a partial discharge pulse Detector 7; the monitoring background 5 is respectively connected with the DC high voltage device 1, the IGBT high voltage switch 2, the capacitive voltage divider 4 and the partial discharge pulse detector 7; the output end of the DC high voltage device 1 is respectively connected with the IGBT high voltage switch 2 , the resonant inductance 3 is connected, and the resonant inductance 3 is connected with the capacitive voltage divider 4 and the compensation capacitor 6 in sequence; the compensation ...

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Abstract

The invention provides a novel cable oscillation wave partial discharge detection system which comprises a DC high voltage device, an IGBT high voltage switch, a resonant inductor, a capacitive voltage divider, a monitoring background, a compensation capacitor, partial discharge pulse detectors, and a detected cable. The system has the advantages that: (1) the compensation capacitor with adjustable capacitance is added, when a cable with too short length is measured, the measurement precision is effectively improved; (2) two ports of the cable are equipped with the partial discharge pulse detectors, the problem of too serious attenuation caused by a too long signal transmission distance in the process of the oscillation wave test of the cable with the too long length is effectively solved, and the measurement precision is raised; and (3) the measurement effects of a too short cable and a too long cable are good, and the measured cable length range is increased significantly compared with the prior art.

Description

technical field [0001] The invention relates to a cable partial discharge detection system, in particular to a novel cable oscillating wave partial discharge detection system, which belongs to the technical field of partial discharge measurement of high-voltage power cables in the power industry. Background technique [0002] The shock wave voltage detection method is a technique with good application effect for the detection and location of partial discharge of power cables, and it is also a method of partial discharge detection of power cables commonly used in the power industry. [0003] However, in the process of applying the shock wave detection technology to solve on-site problems, it is found that the existing shock wave detection technology has a better detection effect on medium-length cables (100m to 7000m), but for long cables with a length greater than 8000m and a length less than 100m The detection effect of the short cable is relatively obviously worse. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 董涛张泓张博刘柱揆毕志周于虹程志万
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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