Traction transformer overcurrent diagnosis protection device and method

Abstract

The invention relates to the field of rail transit equipment, in particular to a traction transformer overcurrent diagnosis protection device and method. The traction transformer overcurrent diagnosis protection device comprises an offline learning module for performing data preprocessing and related signal fault feature vector extraction on historical fault data, performing statistical learning modeling on different types of primary side overcurrent fault data based on a decision tree method, and generating a decision tree diagnosis model; and an online diagnosis protection module, which is used for sampling related signals in real time, comparing the related signals with a set threshold value to generate a fault classification enabling mark, extracting related signal fault feature vectors based on the collected signals, carrying out fault judgment in combination with a decision tree diagnosis model to obtain a fault diagnosis result, and executing a corresponding protection isolation strategy according to the fault diagnosis result. According to the invention, precise identification of the overcurrent fault source of the traction transformer is realized, differential protection is carried out based on different fault sources, the equipment availability is effectively improved, and the train application efficiency is improved.

Description

technical field [0001] The invention relates to the field of rail transit equipment, and more specifically, to an overcurrent diagnosis and protection device and method for a traction transformer. Background technique [0002] The construction of my country's high-speed railway is advancing at an unprecedented speed, the technology of locomotives is changing with each passing day, the structure of locomotives is becoming more and more complex, and the technical requirements are getting higher and higher. [0003] Among the protection functions of trains, traction transformer overcurrent protection is one of the most important protection functions. There are many fault sources that lead to traction transformer overcurrent, common ones are traction transformer fault, traction converter fault, pantograph-catenary poor contact, switching on or excitation inrush current caused by short-term network voltage interruption, etc. [0004] The impact of faults caused by different abno...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a traction transformer overcurrent diagnosis and protection device and method to solve the technical problems of the prior art that the fault source of the traction transformer overcurrent is difficult to accurately identify and differentiated protection

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