Device for measuring short-circuit force of power transformer

Abstract

The invention discloses a device for measuring the short-circuit force of a power transformer, and relates to the technical field of power transformer measurement. The device comprises a transformer;a piezoelectric film sensor which is used for acquiring the stress data among a plurality of windings of the transformer and generating an electric signal and is fixed on the transformer through an insulating tape; an oscilloscope which is used for collecting the electric signal and is connected with the piezoelectric film sensor through a shielded wire; and a processing unit which is used for processing the electric signal and is connected with the oscilloscope through a shielded wire. The device solves the technical problem in the prior art that due to the impact of the short-circuit force,the short circuit resistance of the windings of the transformer is not enough, so that the transformer is damaged to cause the accidents, and achieves the technical effects that the cost is lower, theinternal axial force and radial force data of the windings can be measured accurately and reliably, finally a calculation software of the short-circuit force of the related transformer windings is corrected, and the short-circuit accident bearing capacity of the transformer windings is improved.

Description

technical field [0001] The invention relates to the technical field of power transformer measurement, in particular to a device for measuring the short-circuit force of a power transformer. Background technique [0002] At present, with the continuous improvement of the voltage level of the power system, the system capacity and the capacity of a single transformer are also increasing. Under the condition of a certain short-circuit impedance of the transformer, the threat of the short-circuit electromagnetic force to the transformer is more serious. The operation practice of my country's power sector shows that no matter whether it is a transformer produced by a domestic manufacturer or an imported transformer purchased from abroad, under the impact of short-circuit force, there are accidents of damage due to insufficient short-circuit resistance of the winding. Therefore, in order to ensure the safe and reliable operation of the transformer, it is necessary to try to improv...

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Problems solved by technology

[0006] The embodiment of the present invention provides a device for measuring the short-circuit force of a power transformer, which is used to solve the technical problem in the prior art that the impact of the short-circuit force easily causes the transformer winding to be damaged due to insufficient short-circuit resistance, and achieves a relatively low cost. Low, can accurately and reliably measure the data of the internal axial force and radial force of the winding, and finally correct the calculation software for the short-circuit force of the relevant transformer windings, and improve the technical effect of the ability of the transformer winding to withstand short-circuit accidents

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