Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Identifying method of dragging power supply system harmonic wave resonant frequency

A traction power supply system and resonance frequency technology, applied in the field of electrified railways, can solve problems such as affecting the safe operation of trains and serious failures

Inactive Publication Date: 2013-09-11
SOUTHWEST JIAOTONG UNIV
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, currently only when the high-hazard harmonic resonance causes serious faults and affects the safe operation of trains, engineers and technicians will passively solve the problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Identifying method of dragging power supply system harmonic wave resonant frequency
  • Identifying method of dragging power supply system harmonic wave resonant frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention is applied in figure 1 A harmonic resonance identification method for the traction power supply system in the train traction drive system shown. exist figure 1 Among them, the traction drive system includes vehicle traction transformer, four-quadrant converter, secondary filter branch, DC filter capacitor, instantaneous overvoltage protection circuit and motor side; s , four-quadrant converter AC side voltage u ab1 , u ab2 , and passed to the processor through A / D conversion; the processor processes the collected data and completes the identification of the resonant frequency. The transformation ratio of the vehicle traction transformer is 27500:1550:1550, and the switching frequency of the four-quadrant converter is 1250Hz. The specific implementation method is as follows:

[0015] 1. Data acquisition and preprocessing: when the train is working normally (traction or braking), the u s with u ab1 , u ab2 Perform 400-point sampling; calculat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an identifying method of dragging power supply system harmonic wave resonant frequency. The method includes the steps of collecting net voltages, used for dragging or baking a running train, in a dragging power supplying system and all four-quadrant converter alternating current side voltages of the train; after the collected data are preprocessed, using an FTF method to calculate the net voltages, all the four-quadrant converter alternating current side voltages and each sub-harmonic component amplitude; for odd sub-harmonics, calculating a harmonic gain coefficient, and according to a relation curve of the harmonic gain coefficient and frequency, identifying the harmonic resonance frequency. The method not only can be used for guiding model selection of a train which is newly input in a railway and avoid occurrence of highly-harmful resonance, but also can be used for testing and detecting the train and identifying the harmonic resonant frequency of a newly-built railway.

Description

technical field [0001] The invention belongs to the technical field of electrified railways, and relates to a method for identifying harmonic resonance frequency of a traction power supply system. Background technique [0002] The traction power supply system of electrified railway is composed of traction substation, divisional substation, AT station, transmission line (feeder line, catenary, rail and return line), etc. Due to the distributed capacitance and inductance in the traction power supply system, harmonic resonance is prone to occur at a certain frequency. Because of the advantages of high power factor, low harmonic content, high power, high reliability and easy maintenance, AC-DC trains are currently widely used in railway transportation. However, compared with traditional AC-DC trains, the control of AC-DC trains is more complicated and the harmonic spectrum is wider. The AC-DC train is the main harmonic source of the traction power supply system. When the main ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16
Inventor 崔恒斌冯晓云葛兴来熊成林宋文胜王青元
Owner SOUTHWEST JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com