A Fault Diagnosis Method of Boost Converter Based on Multi-Innovation Recursive Least Squares

Abstract

The present invention disclosed a BOOST transformation method based on the minimum two -degree -by -multiplied transformation, which is a fault diagnosis method, which belongs to the field of power transformer failure diagnosis.This method includes a hybrid system discrete model for establishing a Boost converter; the minimum daily recursor model of the Boost converter; obtaining the new interest scalar according to the minimum daily reciprocity model;Output; expand the multi -interest vector according to the length of the new interest, obtain the information matrix and output vector; it is estimated that the parameter vector of the boost converter; according to the estimated parameter vector, determine the estimation value of each component in the Boost converter and determine the boost converterWhether the failure occurs; the problem of low utilization rate of the current BOOST transform failure diagnosis data is solved; the parameter estimation values of the smoothing components have been reached, and the accuracy and the effect of the convergence speed of the BOOST transform failure diagnosis and the effect of convergence speed are improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of fault diagnosis of power converters, in particular to a method for fault diagnosis of Boost converters based on multi-innovation recursive least squares. Background technique [0002] With the development of power electronics technology, various types of power converters have been widely used in electric vehicles, power systems, aerospace, agriculture and other fields. With the continuous expansion of application fields, more stringent requirements are put forward for the performance of power converters such as reliability and stability. [0003] Studies have shown that the degradation of electrolytic capacitors, the failure of switching tubes and the failure of solder joints can all lead to failure of power converters. Among them, the degradation of the electrolytic capacitor is the main cause of the failure of the power converter, which is mainly manifested as the increase of the series res...

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Problems solved by technology

[0003] Studies have shown that the degradation of electrolytic capacitors, the failure of switching tubes and the failure of solder joints can all lead to the failure of power converters

Among them, the degradation of electrolytic capacitor is the main cause of power converter failure, mainly manifested as the increase of series resistance

[0004] There are many fault diagnosis methods for power converters, among which the recursive least squares algorithm is widely used because of its simplicity and convenience, but in the face of online power converter fault diagnosis, there are low data utilization, slow convergence speed, Problems such as low recognition accuracy

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