Power cable partial discharge sensing and detecting device

Abstract

The invention relates to a power cable partial discharge sensing and detecting device which comprises copper foil electrodes, a connecting wire, a sensor, a leading-out optical fiber, a wrapping mold,a photoelectric conversion module, a signal amplification module, a filtering module and a data acquisition and storage module, and the copper foil electrodes are connected with the sensor; electricsignals detected by the two copper foil electrodes are transmitted to the sensor to be converted into optical signals, and the optical signals are led out through the leading-out optical fiber; the leading-out optical fiber transmits an optical signal passing through the sensor to the photoelectric conversion module; the photoelectric conversion module converts an optical signal transmitted by theoptical fiber into an electric signal; the signal amplification module amplifies the electric signal with relatively weak signal intensity; the filtering module filters out low-frequency signals in the electric signals; and the data acquisition and storage module acquires and stores the processed partial discharge data. The method has the advantages of safety, strong anti-interference capability,high precision and the like.

Description

technical field [0001] The invention relates to the field of insulation fault detection of electrical equipment, and more specifically, to a power cable partial discharge sensing and detection device. Background technique [0002] With the rapid development of my country's economy and urban construction, the scale of urban power grids continues to expand. Power cables are widely used in the construction of urban power grids because of their advantages such as reliable power supply and convenient installation and maintenance. In order to maintain the safe and stable operation of the power system, the status monitoring and insulation monitoring of power cables play a prominent role. Partial discharge is one of the main causes of power cable insulation damage, so the detection of high-voltage cable partial discharge has been widely concerned by the power sector and the power industry. [0003] If local damage leads to partial discharge, if it exists for a long time, it will le...

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Problems solved by technology

[0005] The present invention provides a power cable partial discharge sensing and detection device in order to overcome the defect of low partial discharge detection sensitivity described in the above prior art

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