Transformer winding deformation analysis method and device, computer device and storage medium

Abstract

The invention relates to a transformer winding deformation analysis method and device, a computer device and a storage medium, and belongs to the technical field of transformers. The invention can accurately calculate the relative equivalent Rockwell coefficient and relative equivalent of a deformed winding by introducing an equivalent variation. Effective magnetic leakage area. Then, on the basis of the relative equivalent Rockwell coefficient and the relative equivalent magnetic flux leakage area of ​​the deformed winding calculated by the equivalent change amount, the calculation accuracy of the relative short-circuit reactance of the deformed winding after deformation can be further improved. Finally, the deformation degree of the deformed winding is calculated from the equivalent deformation amount and the relative short-circuit reactance of the deformed winding, so that the relationship between the relative short-circuit reactance of the deformed winding and the deformation degree of the deformed winding can be accurately and intuitively reflected.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a transformer winding deformation analysis method and device, a computer device and a storage medium. Background technique [0002] At present, the on-site detection of power transformer winding deformation generally adopts the frequency response analysis method and the low-voltage short-circuit impedance method. [0003] The existing frequency response analysis method is prone to misjudgment because it is easily affected by factors such as wiring mode, test equipment, and transformer residual magnetism. In practical applications, it is often used as an auxiliary judgment basis. In addition, at present, the correlation coefficient of the winding frequency response curve is generally used in the power industry to judge the degree of deformation of the winding. However, using the correlation coefficient of the winding frequency response curve to judge the degree of winding def...

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Problems solved by technology

[0003] The existing frequency response analysis method is prone to misjudgment because it is easily affected by factors such as wiring mode, test equipment, and transformer remanence. In practical application, it is often used as an auxiliary judgment basis

In addition, at present, the correlation coefficient of the winding frequency response curve is generally used in the power industry to judge the degree of deformation of the winding. However, using the correlation coefficient of the winding frequency response curve to judge the degree of winding deformation has no specific physical meaning. Judging whether the winding is obviously deformed or seriously deformed, but the actual degree of deformation of the winding, the percentage of the deformed part of the winding to the winding space, and the size change of the deformed part of the winding are not clear, so the detection accuracy of the winding deformation is not high, and it is practical in the field Sex is not strong

[0004] The existing low-voltage short-circuit impedance method only stipulates the attention value standard of the winding reactance voltage change rate, but does not analyze the relationship between the winding reactance voltage change rate and the degree of winding deformation. Once the on-site detection results of the winding deformation exceed its specified winding According to the attention value standard of reactance voltage change rate, whether the winding is slightly deformed, significantly deformed, or severely deformed cannot be determined, so there are also problems that the detection accuracy of winding deformation is not high, and the field practicability is not strong

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