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Method for diagnosing accidents of waveshape recognition based substation locomotive traction circuit

A traction circuit and waveform recognition technology, applied in the field of rail transit, can solve problems such as less input data, inconspicuous fault characteristics, and insufficient decomposition, achieve accurate fault determination and positioning, avoid network structure design and calculation, and ensure rapidity. Effect

Inactive Publication Date: 2007-02-07
上海地铁运营有限公司
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AI Technical Summary

Problems solved by technology

Although the literature uses the wavelet analysis method to extract the characteristics of the fault waveform and use it for the diagnosis of the neural network, compared with the method of directly using the fault waveform as the input of the neural network, the input data is less, the network training is fast, and it has the advantages of being applied to real-time online Potential for diagnosis, however, when performing wavelet analysis, a multi-scale analysis method is used. Since this method does not analyze the high-frequency part, there is a shortcoming that the decomposition is not fine enough. The formed frequency band is wide and the fault characteristics are not obvious. When diagnosing outside the training sample, the "location" is not accurate enough, and the total operation time (ie, the fault diagnosis cycle) is long

Method used

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  • Method for diagnosing accidents of waveshape recognition based substation locomotive traction circuit
  • Method for diagnosing accidents of waveshape recognition based substation locomotive traction circuit
  • Method for diagnosing accidents of waveshape recognition based substation locomotive traction circuit

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Embodiment

[0035] Example: Main Circuit Test of DC-01 DC Motor Locomotive of Shanghai Metro Line 1

[0036] The main templates included in the main circuit: traction control unit, chopper and its trigger pulse circuit.

[0037] Implementation prerequisites:

[0038] (1) According to the circuit characteristics and fault detection parameters, device characteristic curves and circuit output waveforms accumulated by the research and development institutions and manufacturers of the traction circuit of the subway locomotive under test, sorting, digitization and feature value extraction;

[0039] (2) Form a fault set with the fault waveforms and their parameters that can be sorted out, and form a software module with the structure of the database;

[0040] (3) The combination of half-physical simulation technology and virtual instrument technology is used to establish a comprehensive test platform for the main control system, so that the main control system can simulate the running condition...

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Abstract

The related traction circuit fault diagnosis system based on waveform recognition for underground locomotive comprises: a target circuit slot, a semi-physical analog simulation normal load, a data collector, an ADC, a data buffer, a CPU, a target fault database, a record label buffer, an algorithm software package based on waveform recognition to diagnose and position the fault, and a display. This invention can position fault accurately.

Description

technical field [0001] The invention relates to a method in the technical field of rail transit, in particular to a method for diagnosing a fault in a traction circuit of a subway locomotive based on waveform recognition. Background technique [0002] Electric locomotives have increasingly become traction power vehicles for subway trains that are widely used. The power electronic device inside the locomotive is the core component of the subway locomotive. Most of the probability of locomotive operation failures is concentrated on the power electronic device. To grasp the trouble-free operation cycle of the locomotive in real time, it is necessary to regularly predict and analyze the power electronic devices in it. Therefore, the real-time detection and fault diagnosis of the power electronic circuit and its devices in the traction circuit of the subway locomotive naturally become an important part of ensuring the safe operation of the subway locomotive. necessary key technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C5/02G01R31/28
Inventor 陈鞍龙吴浩杜晓红张秀彬周炯许振华张峰
Owner 上海地铁运营有限公司
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