Built-in partial discharge detecting device of high voltage cable and mounting method thereof

A technology for partial discharge detection and high-voltage cables, which is applied to measuring devices, uses optical methods to test, and measures electricity, etc., which can solve the problems of low accuracy of high-voltage cables, enhance anti-electromagnetic interference capability, improve accuracy, and ensure safety. sexual effect

Pending Publication Date: 2019-08-02
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defect that the above-mentioned existing technology is easily interfered by external electromagnetic signals, the detection accuracy of high-voltage cable partial discharge is low, and the invention provides a built-in high-voltage cable partial discharge detection device, and also provides the above-mentioned built-in high-voltage cable Installation method of partial discharge detection device

Method used

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  • Built-in partial discharge detecting device of high voltage cable and mounting method thereof
  • Built-in partial discharge detecting device of high voltage cable and mounting method thereof

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Embodiment 1

[0031] Such as figure 1 Shown is the built-in high-voltage cable partial discharge detection device of this embodiment.

[0032] The built-in high-voltage cable partial discharge detection device of this embodiment includes an electrode 1, an optical fiber sensor 2, an outgoing optical fiber 3, a photoelectric conversion module 4, a protector 5, an amplifier 6, a filter 7 and a signal detection module 8, wherein the electrode 1 is fixedly arranged On the semi-conductive layer 903 of the cable main body, one end of the optical fiber sensor 2 is connected to the electrode 1, the other end of the optical fiber sensor 2 is connected to the input end of the photoelectric conversion module 4 through the outgoing optical fiber 3, and the output end of the photoelectric conversion module 4 is connected to the protector The input end of 5 is electrically connected, the output end of protector 5 is electrically connected with the input end of amplifier 6, the output end of amplifier 6 i...

Embodiment 2

[0040] This embodiment proposes an installation method of a built-in high-voltage cable partial discharge detection device, which is applied to the built-in high-voltage cable partial discharge detection device of the present invention.

[0041] Wherein, in the cable body provided by the built-in high-voltage cable partial discharge detection device of this embodiment, a PVC outer sheath 901 , an aluminum armor layer 902 , and a semiconductive layer 903 are sequentially arranged from outside to inside.

[0042] Such as figure 2 Shown is the flow chart of this embodiment. The installation method of the built-in high-voltage cable partial discharge detection device of this embodiment includes the following steps:

[0043] S1: Cut a window respectively on the PVC outer sheath 901 and the aluminum armor layer 902 of the cable main body, and open a round hole at the center of the cut window, wherein the size of the opened window is 10cm*10cm, the radius of the hole is 0.5cm;

...

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Abstract

The invention provides a built-in partial discharge detecting device of a high voltage cable. The built-in partial discharge detecting device comprises an electrode, a fiber sensor, an extraction fiber, a photoelectric conversion module, an amplifier, a filter and a signal detecting module. The electrode is fixedly disposed on a semiconductive layer of a cable body. One end of the fiber sensor isconnected to the electrode and other end of the fiber sensor is connected to the input terminal of the photoelectric conversion module through the extraction fiber; and the output terminal of the photoelectric conversion module is electrically connected to the amplifier, the filter and the signal detecting module in sequence. In addition, the invention also proposes a mounting method thereof. Thefiber sensor collects a discharge signal of the cable through the electrode; the collected electrical signal is converted into an optical signal for transmission; the optical signal is transmitted tothe photoelectric conversion module through the extraction fiber to convert the optical signal into an electrical signal again; and then the electric signal is amplified and filtered by the amplifierand the filter in turn and then the processed signal is inputted into the signal detecting module to carry out partial discharge signal detection processing.

Description

technical field [0001] The invention relates to the technical field of power cable detection, and more specifically, to a built-in high-voltage cable partial discharge detection device and an installation method thereof. Background technique [0002] With the development of the economy, power cables are widely used in the power system, so the insulation detection and fault diagnosis of power cables are important measures to maintain the safe and stable operation of the power system. Among them, high-voltage cable partial discharge detection is one of the key technologies for cable insulation detection and fault diagnosis. Under the influence of environment, installation process and other factors, the insulation layer of high-voltage cables is prone to deterioration, resulting in insulation failure of high-voltage cables, thus threatening the safe and stable operation of the power system. [0003] At present, the detection methods for partial discharge of high-voltage cables...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1218G01R31/1272
Inventor 王干军吴毅江
Owner GUANGDONG POWER GRID CO LTD
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