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Harmonic multi-channel synchronous rapid detection method for high-speed railway traction power supply system

A traction power supply system, multi-channel synchronization technology, applied in spectrum analysis/Fourier analysis and other directions, can solve the problems of low detection accuracy, poor real-time performance of multi-channel detection, poor detection effect, etc., to ensure real-time performance and solve spectrum leakage and fence effects, high precision effects

Inactive Publication Date: 2018-06-12
CENT SOUTH UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor detection effect, low detection accuracy and poor real-time performance of multi-channel detection in the existing technology of high-speed rail traction power supply system harmonic detection method

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  • Harmonic multi-channel synchronous rapid detection method for high-speed railway traction power supply system
  • Harmonic multi-channel synchronous rapid detection method for high-speed railway traction power supply system
  • Harmonic multi-channel synchronous rapid detection method for high-speed railway traction power supply system

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Embodiment Construction

[0016] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the implementation shown and described in the accompanying drawings is only exemplary, intended to illustrate the principles and methods of the present invention, rather than limit the scope of the present invention.

[0017] A harmonic multi-channel synchronous fast detection algorithm in a high-speed rail traction power supply system according to the present invention includes a single-branch harmonic detection method and a multi-channel synchronous harmonic detection method. figure 1 The harmonic detection principle of the single-branch artificial neuron network algorithm in the high-speed rail traction power supply system described in the present invention is shown, and the harmonic current detected by it can be expressed as:

[0018] sinωt and cosωt are obtained according to the phase-locked signal, and sinnωt and...

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Abstract

The invention discloses a harmonic multi-channel synchronous rapid detection method for a high-speed railway traction power supply system. The problems of poor detection accuracy, poor real-time performance of multi-channel detection and incomplete measured harmonic spectrum of a harmonic detection method of the high-speed railway traction power supply system in the prior art are solved. The harmonic multi-channel synchronous rapid detection method for the high-speed railway traction power supply system comprises multi-channel synchronous sampling, unified artificial neural network reference input reference, an artificial neural network weight adjustment method, multi-channel synchronous parallel processing, multi-channel artificial neural synchronous learning based on a shared knowledge base and additional functions implemented by an algorithm. According to the invention, synchronous rapid detection of multi-channel harmonics in the high-speed railway traction power supply system is completed, which ensures relatively high accuracy and the real-time performance, synchronism and rapidity of multi-channel detection.

Description

technical field [0001] The invention relates to a fast detection method for harmonic multi-channel synchronization of a high-speed rail traction power supply system. Background technique [0002] With the rapid development of high-speed rail, the operating density of each line is increasing day by day, and some lines even have the phenomenon of high-power double-connected trains or multiple types of trains running mixedly. The prominent harmonic problem has increasingly serious impact on the normal operation of the traction power supply system, resulting in irregular tripping of some traction transformer feeders, pressure mutual explosion and other phenomena. [0003] At present, my country lacks a complete set of systems for systematic evaluation and management of power quality in traction power supply systems, especially in the rapid detection of harmonics. Moreover, the traction power supply system of railway hubs has a complex structure and many feeder circuits. This typ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16
Inventor 陈有根李晓光陈维伟李志勇危韧勇黄挚雄王思君卢佳宾
Owner CENT SOUTH UNIV
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