Dynamic response amplification method and device of oil immersible power transformer

Abstract

The embodiment of the invention discloses a dynamic response amplification method and device of an oil immersible power transformer, which are used for solving the technical problem that the reflection of the change of vibrational and mechanical states of bodies such as an iron core, a winding and the like of the transformer as the vibration magnitude of an oil tank wall is relatively small. The dynamic response amplification method of the oil immersible power transformer, which is disclosed by the embodiment of the invention, comprises the following steps: S1: receiving preset magnification times of vibration of the oil tank wall of the transformer and an initial parameter of a dynamic magnification beam of the oil tank wall; S2: making a harmonic response analysis on the dynamic magnification beam of the oil tank wall and calculating a dynamic amplification factor of the dynamic magnification beam of the oil tank wall; S3: judging whether the difference of the dynamic amplification factor and the times meets a preset threshold; if yes, ending amplification; if not, updating the initial parameter of the dynamic magnification beam of the oil tank wall until the difference of the dynamic amplification factor and the times meets the preset threshold.

Description

technical field [0001] The invention relates to the field of vibration analysis of power equipment, in particular to an oil-immersed power transformer dynamic response amplification method and device. Background technique [0002] The power transformer is the key equipment of the power system, and its safe and reliable operation directly affects the safety and stability of the power grid. When the transformer is running, short-circuit faults often occur, and the short-circuit current generated may cause slight deformation of the winding, which reduces the insulation and mechanical properties. After multiple short-circuits, a cumulative effect occurs, and the insulation, mechanical properties, and deformation of the winding continue to deteriorate. The transformer may have a sudden failure under the subsequent not too large short-circuit current or overvoltage, causing heavy losses. Therefore, it is of great significance to monitor the operating status of the transformer in ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for amplifying the dynamic response of an oil-immersed power transformer, which solves the technical problem that the vibration level of the oil tank wall is too small, and the vibration and mechanical state changes of the transformer core and winding are not sensitive enough.

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