Partial discharge signal blocking device

Abstract

The invention discloses a partial discharge signal blocking device which comprises a blocking device and an insulation guide rod. The blocking device comprises an insulating casing and a number of blocking bodies which are arranged in parallel and connected in series with each other. The blocking bodies are enclosed by an insulation casing. Each blocking body comprises a ferrite magnetic ring and a wrapped copper wire wound on the ferrite magnetic ring. The insulation guide rod runs through the insulation casing and the blocking bodies. The insulation guide rod is vertical to the blocking bodies. The input end of a wrapped copper wire close to the top wall of the insulation casing is electrically connected with a high voltage introduction terminal arranged on the insulation casing. The high voltage introduction terminal is electrically connected with the output end of a test power supply system. The output end of each wrapped copper wire is electrically connected with a high voltage lead out terminal arranged on the insulation casing. The high voltage lead out terminal is electrically connected with a detection circuit composed of a measured high voltage electrical device and partial discharge detection impedance. The device solves the problem of interference of a partial discharge interference signal generated by the test power supply system on a detection result in a partial discharge test.

Description

technical field [0001] The invention relates to the technical field of high-voltage electrical testing, in particular to a partial discharge signal blocking device. Background technique [0002] Partial discharge refers to the discharge that occurs between the electrodes but does not penetrate the electrodes. It is due to the weakness of the internal insulation of the equipment or the defects caused by the production process, and the phenomenon of repeated breakdown or extinction under the action of high electric field strength. With the continuous increase of power system voltage, the partial discharge of high-voltage electrical equipment such as high-voltage transmission lines under the working voltage is an important reason for its insulation aging and even its breakdown. In the high-voltage electrical test, the partial discharge test is an important means to assess the insulation state of the high-voltage electrical equipment. Therefore, many standards or regulations hav...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a partial discharge signal blocking device to solve the problem in the prior art that the partial discharge generated by the test power system interferes with the partial discharge test of high-voltage electrical equipment, resulting in inaccurate detection results

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