110kV transformer entity modeling method for vibration characteristic analysis

Abstract

The invention provides a 110kV transformer entity modeling method for vibration characteristic analysis, and belongs to the field of transformer vibration characteristic analysis. The method comprises the steps: constructing a transformer overall model, wherein the transformer overall model is composed of an oil tank model, an iron core winding model, an oil model and an accessory model; carrying out finite element pretreatment on the overall model of the transformer to obtain a finite element model of the transformer; setting parameters of the finite element model of the transformer according to working conditions of the in-operation transformer; performing simulation calculation on the finite element model of the transformer to obtain a theoretical calculation value; performing simulation result error analysis according to the actual measurement value under the operation transformer working condition and the theoretical calculation value; and if the simulation result error does not exceed the maximum error threshold value, finishing the construction of the overall model of the transformer.

Description

technical field [0001] The invention relates to the field of transformer vibration characteristic analysis, in particular to a 110kV transformer entity modeling method for vibration characteristic analysis. Background technique [0002] Transformer is the main noise source of substation. The noise of transformer is generated by shell vibration. Excessive noise of transformer may lead to loosening of transformer core and excessive temperature rise of winding deformation. These conditions will reduce the ability of transformer to resist short-circuit current impact. It affects the normal operation of the transformer, reduces the operating life of the transformer, and also affects the normal operation of the power grid. [0003] The research on vibration reduction and noise reduction of transformers can be analyzed from the perspective of the vibration characteristics of the transformer. The simulation model of the transformer can be established in the computer, the characteris...

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Problems solved by technology

Due to the large number of parts and various connection methods in the transformer, modeling operations such as building and combining analog devices and finite element mesh division are difficult, and the workload of using the model to perform finite element calculations is also very large

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