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A Method of Determining Amplitude Deformation of Transformer Winding

A technology of transformer windings and transformers, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement devices, etc., can solve problems such as misjudgment, and achieve the effect of high accuracy

Active Publication Date: 2021-01-05
INNER MONGOLIA POWER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is an error in the short-circuit reactance value of a certain pair of windings on the nameplate of the transformer or there is an inherent difference between the three phases of a certain winding, it often leads to misjudgment

Method used

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  • A Method of Determining Amplitude Deformation of Transformer Winding
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  • A Method of Determining Amplitude Deformation of Transformer Winding

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Embodiment Construction

[0032] In order to understand the above objects, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the described embodiments are some, but not all, embodiments of the present invention. The specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations.

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Abstract

An embodiment of the invention relates to a method for determining transverse deformation of transformer windings. The method comprises the steps of taking every two of an outer winding, a middle winding and an inner winding as a winding pair, and determining interphase reactance voltages between phases A, between phases B and between phases C of the two windings in each winding pair; according tothe interphase reactance voltages, determining change rates of the interphase reactance voltages between the phases A, between the phases B and between the phases C of the two windings in each winding pair; determining whether the middle winding and the inner winding have the transverse deformation or not according to the change rates of the interphase reactance voltages; and when the middle winding and the inner winding have the transverse deformation, determining the degree of the transverse deformation according to the change rates of the interphase reactance voltages. Whether the deformation exists or not is determined firstly, and then the deformation degree is determined, so that the method is simple and feasible; and the deformation is determined by the interphase reactance voltages, so that the accuracy is high.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of deformation determination, in particular to a method for determining the amplitude deformation of a transformer winding. Background technique [0002] The frequency response analysis method and the low-voltage short-circuit reactance method are generally used to judge the amplitude deformation of the power transformer winding on the spot. The frequency response analysis method is prone to misjudgment due to the influence of factors such as wiring method, test equipment and transformer remanence. In practical application, it is often used as evidence for other test results. In DL / T 1093 "Guidelines for the Detection and Judgment of the Deformation of Power Transformer Windings by Reactance Method", two judgment methods, the longitudinal comparison method and the transverse comparison method, are recommended for the detection and judgment of the reactance method. The longitudinal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16
CPCG01B7/16
Inventor 郭红兵孟建英荀华杨玥
Owner INNER MONGOLIA POWER GRP
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