Partial discharge detection pulse current sensor with self correcting function

Abstract

The invention relates to a partial discharge detection pulse current sensor with a self correcting function, belonging to the technical field of sensors for detection. The technical scheme of the partial discharge detection pulse current sensor is as follows: a closed-loop magnetic core (5), an output coil and a correcting coil are arranged in a shell, the output coil wound on the closed-loop magnetic core is used for inducing a current flowing through the closed-loop magnetic core to carry out partial detection, the correcting coil is additionally arranged on the closed-loop magnetic core so as to be used for realizing self correcting and self detection functions, and the partial discharge detection pulse current sensor is provided with a correcting interface (1) and an output interface (6), the correcting interface is connected with the correcting coil, and the output interface is connected with the output coil. The shell is of various structures, comprising an opening rectangle structure and a closed round structure, and is suitable for partial discharge online routing inspection or local discharge online monitoring. The partial discharge detection pulse current sensor disclosed by the invention has the beneficial effects of realizing self correcting and self detecting functions, being suitable for local discharge online inspection or partial discharge online monitoring, and being convenient and exact.

Description

technical field [0001] The invention relates to a partial discharge detection pulse current sensor with a self-calibration function, belonging to the technical field of detection sensors. Background technique [0002] At present, there are many kinds of sensors for partial discharge detection. Among them, the pulse current sensor is mainly used to detect the pulse current change on the grounding wire of the equipment. However, this type of sensor generally only has one output interface. When actually installing and calibrating, it is necessary to wind the transformer separately. As a calibration coil, calibration can only be performed by inputting a standard signal, and it will be inconvenient to calibrate again after the sensor is installed. In addition, this type of sensor has only one output interface, and it is impossible to judge whether it is still in a normal working state after long-term partial discharge inspection or partial discharge online monitoring and other ac...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many kinds of sensors for partial discharge detection. Among them, the pulse current sensor is mainly used to detect the pulse current change on the grounding wire of the equipment. However, this type of sensor generally only has one output interface. When actually installing and calibrating, it is necessary to wind the transformer separately. As a calibration coil, calibration can only be performed by inputting a standard signal, and it will be inconvenient to calibrate again after the sensor is installed

In addition, this type of sensor has only one output interface, and it is impossible to judge whether it is still in a normal working state after long-term partial discharge inspection or partial discharge online monitoring and other actual use

It even needs to shut down the monitored equipment to make a judgment, which brings unnecessary trouble to the operation of the equipment

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