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Railway vehicle braking resistor temperature estimation protection method and system

A technology for braking resistors and rail vehicles, applied in the field of rail transit, can solve problems such as damage, burning and melting, and temperature rise, and achieve the effect of stable work guarantee

Pending Publication Date: 2022-05-24
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessive use of the brake resistor will cause its temperature to rise, and in severe cases, it will be damaged or even burned and melted

Method used

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  • Railway vehicle braking resistor temperature estimation protection method and system
  • Railway vehicle braking resistor temperature estimation protection method and system
  • Railway vehicle braking resistor temperature estimation protection method and system

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Embodiment Construction

[0044] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0045] figure 1 A schematic diagram of a method for estimating and protecting the temperature of a braking resistor of a rail vehicle provided in the first embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0046] Step 1: During the current collection period, continuously collect the instantaneous voltage of the DC bus, the instantaneous current of the chopping branch, and the real-time duty cycle of the control pulse of the choppi...

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Abstract

The embodiment of the invention relates to a temperature estimation protection method and system for a braking resistor of a railway vehicle. The method comprises the following steps: continuously acquiring the real-time duty ratio of the instantaneous voltage of a direct-current bus, the instantaneous current of a chopping branch and the control pulse of the chopping branch in a current acquisition period; estimating the real-time power of the braking resistor in the period to generate corresponding first power P1; carrying out temperature rise estimation on the braking resistor in the period to generate corresponding first temperature rise data T; estimating the temperature of the braking resistor in the period to generate a corresponding first resistance temperature T; whether the first resistor temperature T exceeds a preset temperature threshold value or not is judged, if yes, a protection instruction is sent to the traction converter, and the traction converter is controlled to conduct corresponding protection operation. According to the invention, the real-time temperature information of the brake resistor can be obtained on the premise of not additionally arranging other measuring equipment, and the stable work of the brake resistor is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of rail transportation, in particular to a method and system for temperature estimation and protection of a braking resistor of a rail vehicle. Background technique [0002] The braking resistor is an important part of the traction converter system of the rail vehicle. Its main function is to release the electric energy of the DC link and avoid the excessive voltage of the DC link. Traction converters of EMUs are usually of AC-DC-AC topology, with braking resistors hung in the middle DC link; traction converters of urban rail vehicles are usually of DC-AC topology, with braking resistors attached to the DC links; braking resistors The connection method is usually a resistance connection between the side of the power switching device of the DC link chopper branch and the ground point. The working principle of the braking resistor is to consume the excess electric energy of the DC link on the braking resistor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/12H02H5/04
CPCH02H7/1216H02H5/04Y02T10/72
Inventor 曾凡飞杨其林尚付磊林显琦张佳波苗存绪
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST