Power cable partial discharge detection system based on the combination of UHF and HFCT

A partial discharge detection, power cable technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as fault occurrence, increase equipment failure rate, increase power equipment operating costs and power outage time, etc., to achieve detection safety , Easy operation setting and diagnosis, friendly human-computer interaction effect

Inactive Publication Date: 2018-08-28
TIANJIN UNIV
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Problems solved by technology

The traditional off-line detection method increases the operating cost and power outage time of power equipment, and even increases the failure rate of equipment, and there is still a probability of failure between maintenance intervals, which has been unable to meet the actual needs of power production and people's lives.

Method used

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  • Power cable partial discharge detection system based on the combination of UHF and HFCT
  • Power cable partial discharge detection system based on the combination of UHF and HFCT
  • Power cable partial discharge detection system based on the combination of UHF and HFCT

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Embodiment Construction

[0036] The invention relates to a partial discharge detection for the insulation of three-phase power cables under the cross-connection mode of the metal sheath, in particular to a double-terminal partial discharge fault detection based on the double CT method. The combination of sensors can maintain high sensitivity to detect the internal partial discharge of the running power cable insulation, and transmit it to the host through signal acquisition and signal processing, and then describe the characteristics of the partial discharge of the power cable from multiple angles. Based on the combination of UHF and HFCT Cable partial discharge detection system.

[0037] The technical solution adopted in the present invention is: a power cable partial discharge detection system based on the combination of UHF and high frequency current, including UHF signal acquisition unit, data acquisition and transmission unit connected in series; High-frequency signal acquisition unit, data acqui...

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Abstract

The invention relates to partial discharge detection of three-phase power cable insulation in a metal sheath crossing interconnection mode, and provides a power cable partial discharge detection system based on ultrahigh-frequency and high-frequency current combination for diagnosing and recognizing the insulation partial discharge defect of the power cable. Therefore, the technical scheme adoptedby the invention is that the power cable partial discharge detection system based on the combination of UHF and HFCT comprises an ultra-high frequency signal acquisition unit, and a data acquisitionand transmission unit, which are sequentially in series connection; a high-frequency signal acquisition unit, a data acquisition and transmission unit, which are sequentially in series connection; a host computer and a wireless synchronization module. The method is mainly applied to partial discharge detection of phase power cable insulation.

Description

technical field [0001] The present invention relates to a partial discharge detection for the insulation of three-phase power cables in the form of metal sheath cross-connection, in particular to a double-terminal partial discharge fault detection based on the double CT method, specifically, to a method based on the combination of UHF and HFCT Power cable partial discharge detection system. Background technique [0002] XLPE cables (Cross-linked Polyethylene, XLPE) are an important part of the city's power supply and main grid. Since they are laid by direct burial, pipes, trenches and tunnels, the laying environment and use status will greatly affect The life of the cable, after being put into use, is not only affected by the action of the electric field, mechanical action, and heat, but also by environmental factors. Under the combined action of these factors, the cable insulation is prone to aging, resulting in partial discharge, which is the cause of power grid accidents....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 杜伯学朱闻博姜金鹏孔晓晓李进
Owner TIANJIN UNIV
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