Standby power supply system of steel rail milling and grinding vehicle and seamless switching method thereof

Abstract

A standby power supply system of a steel rail milling and grinding vehicle comprises: a power vehicle II, a power vehicle I and an operation vehicle which are connected; a main internal combustion generator set P1 is arranged on the power vehicle I, an auxiliary internal combustion generator set P2 is arranged on the power vehicle II, and the electric energy output end of the main internal combustion generator set P1 is connected to a main input power supply interface of a power change-over switch; an electric energy output end of the auxiliary internal combustion generator set P2 is connectedto a mains supply input interface of a power change-over switch, the power change-over switch is connected to all electric loads of the whole vehicle, and the main internal combustion generator set and the auxiliary internal combustion generator set are switched and selected through the power change-over switch. The stand-by power supply system is connected to the whole vehicle basic electricityload so as to ensure that the whole vehicle basic electricity load supplies power uninterruptedly during switching of the main internal combustion generator set and the auxiliary internal combustion generator set. The standby power supply system serves as emergency energy in the power source switching period, normal uninterrupted work of basic equipment is guaranteed, machining data loss, insufficient emergency treatment environment light and other factors are effectively avoided, and therefore, the operation safety of the steel rail milling and grinding vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of railway engineering and maintenance vehicles, and in particular relates to a backup power supply system for rail milling and grinding vehicles and a seamless switching method thereof. Background technique [0002] At present, the use of rail grinding / rail milling technology for railway line maintenance has become the consensus of track maintenance at home and abroad. The internal combustion generator set is mature and stable in the field of rail grinding. It not only has high thermal efficiency, low fuel consumption, low cost, quick start, simple operation, but also has a wide power range, which is conducive to type selection and design. In recent years, with the doubling of the operating frequency of railway vehicles, great requirements have been placed on the safety and stability of railway vehicles. Therefore, in the process of vehicle research and development, FEMA failure mode compatibility design h...

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Problems solved by technology

Therefore, in the process of vehicle research and development, FEMA failure mode compatibility design has become a rigid index in the industry. It is necessary to have a main internal combustion generator set to provide the power source for the vehicle load, and to configure an auxiliary internal combustion generator set as the main engine. The backup power source of the internal combustion generator set, but the overall volume of the internal combustion generator set is relatively large, and it is often impossible to configure the main and auxiliary internal combustion generator sets on the same vehicle at the same time. When the main internal combustion generator set fails, it is necessary to connect the backup auxiliary internal combustion generator set Power supply grid, but the switching process requires a certain interval of time, which may cause the loss of processing data caused by the interruption of the power supply of key electrical equipment, and the driving system stops working. Therefore, it is urgent to design a switch between the main and auxiliary internal combustion generator sets. During the process, the technical scheme of using the backup power system on the rail vehicle to maintain the normal power demand of key equipment

If a lead-acid battery is used as the emergency power source for switching between the main and auxiliary internal combustion generator sets, this solution is economical and simple, but the battery usage status cannot be reported to the vehicle, and charging can only be done through human intervention and the frequency of intervention is relatively high. When the unit fails, the uninterrupted power supply of the control system cannot be guaranteed

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