Cable insulation detection device based on oscillatory wave test

A technology of cable insulation and detection device, which is applied in the direction of measuring device, testing dielectric strength, measuring electricity, etc., can solve the problems of reduced partial discharge detection sensitivity and weak current system interference, etc.

Inactive Publication Date: 2017-02-22
合肥智璞供应链管理有限责任公司
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Problems solved by technology

But the ensuing problem is that the strong current system produces strong interference to the weak current system, and it is easy to submerge the small partial discharge signal in the interference signal, resulting in a decrease in the sensitivity of partial discharge detection

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  • Cable insulation detection device based on oscillatory wave test

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Embodiment Construction

[0015] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0016] like figure 1 As shown, a cable insulation detection device based on an oscillatory wave test includes a strong current unit and a weak point unit. The strong current unit includes a high-voltage DC source, an air-core inductor, a high-voltage solid-state switch, a coupling capacitor, and a voltage divider to form a damped oscillation voltage Generator and corresponding measurement circuit; the weak current unit includes detection impedance, signal conditioning c...

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Abstract

A cable insulation detection device based on the oscillatory wave test disclosed by the invention comprises a heavy current unit and a weak current unit. The heavy current unit includes a high-voltage direct current source, a hollow inductor, a high-voltage solid-state switch, a coupling capacitor and a voltage divider to form a damped oscillation voltage generator and a corresponding measurement circuit. The weak current unit includes a detection impedance, a signal conditioning circuit, a data collection circuit to perform data collection and transmission of partial discharging signals and oscillation voltage signals. The heavy current unit and the weak current unit are respectively arranged in two independent cavities of a shielding box, and a connection wire between the heavy current unit and the weak current unit passes through the isolation wall of the cavity. The cable insulation detection device based on the oscillatory wave test can inhibit the body discharging interference and the background noise and external interference so as to improve the whole anti-interference performance of the system.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a cable insulation detection device based on an oscillatory wave test. Background technique [0002] Partial discharge is the precursor of cable insulation failure, and effective detection of partial discharge is an important way to improve the level of cable condition maintenance. Oscillating wave partial discharge detection technology is a newly emerging cable defect detection technology in recent years, which can effectively detect field cable partial discharge and accurately locate the fault point. At present, in the use of the cable oscillatory wave partial discharge detection system, the interference problem in the partial discharge detection process is one of the key technical issues; in order to meet the requirements for system portability under field test conditions, the oscillatory wave partial discharge detection system will The high-voltage generation part an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/16
CPCG01R31/1272G01R31/16
Inventor 阚屹峰
Owner 合肥智璞供应链管理有限责任公司
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