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

Switch-free switching auto-passing neutral section device for the electric railway

An automatic over-phase and electrified railway technology, applied in electric vehicles, collectors, power lines, etc., can solve the problems of increasing the cost of operation and maintenance, affecting the reliability of automatic over-phase, and improve the reliability and safety of power supply. , the effect of reducing adverse effects and reducing investment costs

Active Publication Date: 2012-05-30
李子晗
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of automatic over-phase separation is that the switch needs to switch frequently, and the overvoltage generated during the switching process affects the life of the switch, which not only affects the reliability of automatic over-phase separation, but also requires frequent replacement of the switch, which increases the Operation and maintenance costs

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
  • Switch-free switching auto-passing neutral section device for the electric railway

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0020] figure 1 Shown, a kind of embodiment of the present invention is: in a kind of electrified railway non-switch switching automatic phase splitting device, the three-phase input terminals A, B, C of the three-phase-two-phase transformer T of the traction substation are respectively connected with The three phases of the public grid are connected, and there is a high-voltage large-resistance resistor R connected in series between the power supply arms U, D of any output phase α, β and the catenary neutral section M1 at the exit of the traction substation; the traction substation A high-voltage large-value resistor R is also connected in series between the end of any power supply arm U and D of the substation and the catenary neutral section M2 between the two traction substations.

[0021] In this example, the withstand voltage of the high voltage and large resistance resistor R is greater than 27.5kV, and the resistance value is 150-1500Ω.

[0022] figure 1 It also show...

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 a switch-free switching auto-passing neutral section device for the electric railway, which is characterized in that high voltage large resistance electric resistance Rs are connected in series among a power supply arm U and a power supply arm D of any output phase alpha and beta of a three-phase-two-phase transformer T of a traction substation and a contact network neutral section M1 at the exit of the traction substation; the high voltage large resistance electric resistance Rs are also connected in series between ends of the power supply arm U and D of the traction substation and the contact network neutral section M2.The auto-passing neutral section device dispenses with a high voltage switch or a breaker, avoids transient overvoltage due to frequent switching, realizes safe and reliable auto-passing neutral section of an electric locomotive and saves operation costs and maintenance fees.

Description

technical field [0001] The invention relates to a non-switch switching automatic phase separation device for an electrified railway. Background technique [0002] The single-phase system has the advantages of simple structure, low construction cost, convenient operation and maintenance, etc., which determines that the railway system generally uses single-phase power frequency AC power supply for railway locomotives on electrified railways. As a power supply department, the power system hopes that the railway system will draw current symmetrically from the grid in three phases, so as to avoid causing excessive negative sequence current in the grid. In order to meet this requirement, the electrified railway adopts the scheme of phase sequence rotation and phase-by-phase power supply. Every 20-25km along the railway line is used as a power supply section, and each section is powered by different phases in the power grid in turn. This method of segmented power supply and phase ...

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 Patents(China)
IPC IPC(8): B60L5/00B60M1/00
Inventor 李子晗陈民武周福林刘炜刘航
Owner 李子晗
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