Interior partial discharge detection device for gas insulation composite apparatus

Abstract

The invention relates to a gas insulation combination electric appliance internal local discharge detector, belonging to the high voltage insulation detection technical field, for resolving the problem that the prior art can not effectively filter environment signals and interference signals in detection. The gas insulation combination electric appliance internal local discharge detector comprises a shield ring outside a GIS insulation sub ring, which is provided with a detection window; an antenna group and a detection unit, while the antenna unit at least comprises a first antenna unit and a second antenna unit and the detection unit comprises a signal operation circuit for eliminating the environment interference signals in the received GIS leakage signal to obtain a GIS local discharge signal. The gas insulation combination electric appliance internal local discharge detector can correctly detect various local discharges in GIS in early period, without error and leaked judgment. For the integrated online detection system, the gas insulation combination electric appliance internal local discharge detector has reduced cost and can realize simple and effectively following treatments.

Description

Technical field [0001] The invention relates to the technical field of high-voltage insulation detection, in particular to a partial discharge detection device inside a gas-insulated combined electrical appliance. Background technique [0002] Gas-insulated combined electrical appliances (GIS) have been used more and more widely due to their small footprint and high operational reliability. Although the reliability of GIS is relatively high and the probability of failure in its operation is low, once a failure occurs, its destructiveness is also great, and the loss caused by the accident is great. [0003] The internal faults of various types of GIS faults are more common and difficult to predict, and the internal faults are mainly caused by insulation damage. The main form of early insulation failure of GIS is partial discharge. However, because GIS is fully enclosed in structure, it is technically troublesome to detect the possible fault signs directly from the inside, and it m...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that environmental signals and interference signals cannot be effectively filtered in the detection process of the prior art, the present invention provides an internal partial discharge detection device for gas-insulated combined electrical appliances, which can output effective internal partial discharge through the conditioning circuit in it. detection signal

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