Method and system for maintaining urban railway transit train to work in non-stop mode in electroless area

Abstract

An embodiment of the invention provides a method and a system for maintaining an urban railway transit train to work in the non-stop mode in an electroless area. The method includes that a controller automatically judges whether a movable train needs to enter the brake mode, the controller calculates micro-brake request moment according to the deviation between current middle direct current voltage sampling value and middle direct current voltage target value required by the system and outputs micro-brake request moment to a motor driving system when the controller judges that the movable train enters the micro-brake mode, the motor driving system generates pulse-width modulation (PWM) signals corresponding to the micro-brake request moment, a traction inverter outputs driving current corresponding to the micro-brake request moment to a traction motor after the PWM signals are processed by the traction inverter, and the traction motor conducts micro brake according to micro-brake request moment and converts kinetic energy of the train into alternating current electric energy which is fed back to a main circuit through the traction inverter to supply power to power utilization loads. The method and the system provide a power supply mode in the electroless area and are convenient, reliable, wide in application range and low in cost.

Description

technical field [0001] The invention relates to the field of urban rail transit power supply, and more specifically, relates to a method and system for maintaining uninterrupted operation of urban rail transit trains in areas without electricity. Background technique [0002] Urban rail transit trains refer to rail transit vehicles such as subways and urban light rails. At present, most of the working energy of urban rail transit trains comes from the power supply network. figure 1 For the schematic diagram of supplying power to urban rail transit trains in the prior art, refer to figure 1 , an urban rail transit train includes multiple motor cars, the power supply circuit of each motor car receives current equipment externally, and each motor car obtains electric energy from the power supply network through the external current receiving device, and the obtained electric energy is sent to each automatic car through the main circuit of each motor car In order to meet the e...

AI Technical Summary

Problems solved by technology

[0008] It is difficult for the DC bus to pass through the car hook of the moving workshop, which makes the DC bus technology not applicable when urban rail transit trains need to be flexibly organized;

Images