A control method and system for a supply system

Abstract

The invention discloses a control method and system of a train supply system, which comprises a train supply management cabinet sending start signals to N train supply units respectively; each train supply unit executes the following steps: a field programmable gate in the train supply unit The array FPGA module starts timing when it receives the start signal; the control module of the column supply unit controls the charging contactor and the shorting contactor to close when receiving the start signal, and after the first preset time T C Afterwards, the charging contactor is controlled to be disconnected; the FPGA module passes through the second preset time T S Afterwards, the switch closing command is sent; the DSP module of the column supply unit controls the switch closing of the column supply unit where it is located after receiving the switch closing command; the control module reaches the third preset time T when the switch closing time i After that, the four-quadrant rectifier module is controlled to start. The invention reduces the oscillating current among the train supply units, avoids the occurrence of overcurrent faults, and reduces the impact on train loads.

Description

technical field [0001] The present application relates to a control method and system for a supply system. Background technique [0002] The train power supply system (hereinafter referred to as the train supply system) is mainly used in the power supply of railway passenger trains. my country's railway passenger trains generally adopt the power supply mode of locomotive centralized power supply. DC600V DC power supply voltage, each car then converts the DC voltage into the required form of electric energy to drive the train load. [0003] The commonly used column supply system is generally a distributed column supply system, and its main circuit structure is as follows: figure 1 As shown, it consists of two identical train supply units and a train supply management cabinet. When the locomotive is in the long marshalling operation mode, the train supply management cabinet connects the two train supply units in parallel to supply power to the trailer in parallel. The control...

AI Technical Summary

Problems solved by technology

[0004] In the above control method, since the two train supply units are not synchronized when the switches are closed respectively, the voltage of the supporting capacitor on the train supply unit where the first switch is turned on will be pulled down by the train load, and when the switch of the other train supply unit is subsequently turned on At this time, there will be a large voltage difference between the two supporting capacitors, and they will charge and discharge each other, forming a large oscillating current, which is prone to overcurrent faults and impacts on the train load

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