Method for comprehensively analyzing and diagnosing deformation of winding of transformer

Abstract

Provided is a method for comprehensively analyzing and diagnosing deformation of a winding of a transformer. The method for comprehensively analyzing and diagnosing the deformation of the winding of the transformer comprises the stages of establishing a collecting and diagnosing system, collecting data of the winding of the transformer, carrying out logic analysis, area judgment, tendency judgment and comprehensive diagnosis on data of all phases and all frequency bands in frequency response tests, and the like. Through the method for comprehensively analyzing and diagnosing the deformation of the winding of the transformer, correct analyzing and judging conclusions of the deformation testing data of the transformer can be given timely and effectively through a comprehensive intelligent specialist distinguish library, the steps of draining oil, lifting a cover and then checking the winding of the transformer are avoided, the power outage overhaul time of the fault transformer is shortened greatly, powerful decision making bases are provided for the technological decision making of leaders, and a key function is performed for reducing external power outage time by the fault transformer.

Description

technical field [0001] The invention belongs to the technical field of transformer detection, in particular to a method for comprehensive analysis and diagnosis of transformer winding deformation. Background technique [0002] At present, the methods for detecting transformer winding deformation at home and abroad mainly include frequency response analysis method and short-circuit impedance detection method. [0003] Frequency response analysis method, the current testing technology can only measure qualitatively, as for the quantification of winding deformation and the positioning technology of the deformation part is not perfect. Moreover, at present, due to the different sensitivities of test instruments produced by different manufacturers, the curves of each frequency band are different, which affects the analysis. For the frequency response method, using instruments produced by different manufacturers, for the same period of time, the same manufacturer, the same type o...

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Problems solved by technology

[0004] Although the short-circuit impedance detection method has an intuitive effect and can be judged by referring to specific standards, this method can only detect the seriously deformed state of the winding, and has the disadvantages of large test error and low test sensitivity.

[0005] At present, there is no transformer winding deformation testing instrument at home and abroad with a comprehensive intelligent expert judgment library, and can give exact test conclusions

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