Full-true partial discharge monitoring device for switchgear

Abstract

The invention relates to a full-true partial discharge monitoring device for a switchgear. The full-true partial discharge monitoring device comprises a full-true partial discharge analysis system, asmart terminal and a full-true partial discharge monitoring instrument. The two ends of the full-true partial discharge monitoring instrument are in data connection with the smart terminal and the full-true partial discharge analysis system respectively. A lightning arrester connected to the switchgear is arranged at the full-true partial discharge monitoring instrument; and a pedestal connected with the switchgear is installed at the bottom of the lightning arrester. The smart terminal connected with the lightning arrester is arranged between a wiring terminal and the pedestal. One end of thesmart terminal is respectively connected with a casing pipe main capacitor and a signal collecting capacitor that are connected in series; and an access terminal of the casing pipe main capacitor anda connecting terminal of the signal collecting capacitor are connected with a high voltage end and a ground wire. The output terminal of the smart terminal is provided with signal cables connected with the full-true partial discharge monitoring instrument through a partial discharge signal port and a working frequency signal port. The device has the following beneficial effects: the partial discharge value of the switchgear is reflected truly; and synchronous partial discharge detection of multiple channels is realized and the detection precision is high.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power transmission and transformation and power distribution equipment, and in particular relates to a full-real partial discharge monitoring device for a high-voltage switchgear. Background technique [0002] High-voltage switchgear is widely used in power distribution systems for receiving and distributing electric energy. Once the insulation fault occurs in the switchgear in operation, it will cause equipment damage, power outage, etc., causing great economic losses to users. Establishing an effective insulation monitoring and diagnosis system can predict and evaluate the reliability and life of the insulation of the complete set of switchgear equipment, detect faults early, and propose countermeasures to prevent insulation faults from occurring. [0003] When the insulation weakness of high-voltage electrical equipment appears, the first reaction is the obvious increase of partial discha...

AI Technical Summary

Problems solved by technology

[0004] The difficulty of partial discharge monitoring in switchgear is that there are many electrical devices in the switchgear, with great mutual interference, and there is no direct partial discharge signal monitoring interface

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