GIL electric contact state monitoring information fusion and fault diagnosis method, device and system

Abstract

The invention provides a GIL electric contact state monitoring information fusion and fault diagnosis method, device and system. The method comprises the following steps: acquiring temperature rise and vibration maps of a GIL shell under different electric contact defects; fusing the heating and vibration monitoring information of the GIL shell on the feature layer, and obtaining the consistency description of the state of the internal contact; and marking that GIL contact states under different defects are not consistently described, performing classification training by using a deep learning neural network, and constructing a GIL electrical contact fault diagnosis method and model. The GIL electric contact state monitoring information fusion and fault diagnosis method provided by the invention can realize fusion of heating and vibration heterogeneous information of GIL equipment, provides technical support for electric contact state maintenance of the GIL equipment, realizes intelligent diagnosis of contact faults of GIL contacts, and has great significance in improving the intelligent operation and maintenance level of the GIL equipment and guaranteeing safe and stable operation of equipment.

Description

technical field [0001] The present invention belongs to the technical field of electric equipment, and in particular relates to a GIL electric contact state monitoring information fusion and fault diagnosis method, device and system. Background technique [0002] Gas-insulated transmission line (GIL) is a kind of high-voltage, high-current power transmission equipment that uses SF6 gas or a mixed gas of SF6 and N2 as the insulating medium, and the shell and conductor are coaxially arranged and placed in the pipeline. Small, reliable and other characteristics, it is widely used in the field of large-capacity, long-distance power transmission. GIL electrical contacts mostly use plug-in structures such as plum blossoms / straps / coil springs with interference assembly. During operation, due to the existence of contact resistance, the temperature rise of the electrical contact parts is higher than that of the conductor parts, and the heat passes through the natural gas in the GIL. ...

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Problems solved by technology

[0003] At present, the loop resistance test before the GIL equipment is put into operation can only evaluate the overall contact state of the test loop. Since the GIL electrical contact adopts a multi-contact parallel structure, it is difficult to detect and discover the hidden danger of a single contact or contact; for the operation The electrical contact state diagnosis of GIL in the middle can only carry out a single temperature rise or vibration information detection. Since the coupling mechanism of temperature rise-vibration multi-scale and multi-physics field is not clear, and the fault propagation process of GIL temperature rise and vibration under contact defects is unknown, Lack of effective temperature rise / vibration joint detection technology, it is difficult to achieve accurate diagnosis of the electrical contact state inside the GIL

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