Electric locomotive train power supply control method, system and train power supply equipment

Abstract

The invention discloses a train power supply control method and system for electric locomotives and train power supply equipment. The method includes the steps of judging whether the train power supply equipment meets determined conditions or not; if yes, executing an analysis step; analyzing a current operating mode of the train power supply equipment; calling a corresponding voltage regulator to control power supply according to the operating mode. The determined conditions include normality of train power signals, normality of train power supply application signals, shutoff of an electric locomotive power supply key, and operational normality of an electric locomotive auxiliary converter. The different voltage regulators are called according to the mode of the train power supply equipment; accordingly, the train power supply equipment can respond quickly to impact during sudden input of a load when the equipment starts, the train power supply equipment can output voltage stably during the operating process, and the requirements of field applications are met to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of train power supply control, in particular to a train power supply control method and system for electric locomotives and train power supply equipment. Background technique [0002] In order to promote energy saving and consumption reduction of railways and improve transportation efficiency, generator cars have been canceled on a large scale, and power supply equipment for electric locomotive trains has been promoted. The train power supply equipment is responsible for directly supplying two channels of DC voltage 600V power supply to the electric passenger car. In terms of system composition, it generally consists of one or two train power supply cabinets. Currently, it has been used on a large scale in SS7, SS8, SS9, HXD3C and other electric locomotives. application. [0003] For the current control method of train power supply equipment, take the mainstream HXD3C electric locomotive train power supply ...

AI Technical Summary

Problems solved by technology

[0005] However, during the application of train power supply equipment, DC600V output voltage instability, oscillation, etc. will be encountered. These situations are often caused by:

[0006] ① Every time the train power supply equipment of electric locomotives is restarted, the passenger car load will also be reloaded, especially the initial load will cause a greater impact on the train power supply equipment, resulting in large fluctuations in output voltage, sometimes even exceeding the passenger car load. Tolerance range (according to the iron standard, the voltage fluctuation range is DC500V-DC660V)

Once the voltage fluctuation exceeds the range, it will cause overvoltage or undervoltage protection and subsequent repeated loading of the bus load, making it difficult to start the bus load (such as air conditioners, fans, etc.) for a long time, shortening the normal working time of the bus load

[0007] ②Electric locomotives have frequent excessive phase separation, which occurs once every 20 to 30 minutes on average, and express trains occur once every ten minutes in some sections, which also causes frequent restarts of train power supply equipment

Therefore, if the passenger car load cannot be loaded quickly and smoothly after the phase split, it will greatly affect the passenger comfort, for example, the normal ventilation, cooling or heating capacity of the passenger train cannot be guaranteed.

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