Reasoning for the parameters of the traction system of an industrial shunting battery locomotive

Abstract

The article is devoted to determining and justifying the parameters of the traction system of an industrial manoeuvring battery locomotive, the use of which in industrial enterprises will allow the renewal of the locomotive fleet with insufficiently efficient diesel locomotives. The key advantages of using such locomotives are reduced fuel and energy consumption, lower maintenance costs, and reduced harmful emissions. To determine the parameters of traction systems, an analysis of the operating modes of existing shunting diesel locomotives was performed based on data from on-board systems. Data from ChME3 diesel locomotives used for shunting at Poltava Mining and Processing Plant PJSC was processed. It was determined that energy consumption during a twelve-hour shift ranges from 404 kWh to 1031 kWh at a maximum tangential power of 250 kW. With the specified energy consumption, the capacity of the energy storage device is 1022...1874 kWh. Calculations of the parameters of an energy storage device with lithium iron phosphate cells show that the mass of the cells is 5.8…10.7 tonnes, and the volume required for their placement is 2.9…4.9 m³. To accommodate storage devices with such mass and size parameters, as well as other electrical equipment, an appropriate locomotive design is required. The power of the energy storage device is 511...937 kW, which allows the locomotive to be used for hauling work characterised by a tangential power of no more than 420 kW. To ensure the energy efficiency of the traction electric drive, it is advisable to use an energy storage device with a maximum voltage of 600 V. This allows direct connection of auxiliary system converters to the storage device. For this case, a structural diagram of the traction system is proposed.

The energy performance of traction collector and asynchronous electric drives is considered. When using traction asynchronous electric motors in combination with two-stage gearboxes, an increase in the efficiency of both the traction electric drive and a reduction in energy consumption for cooling traction electric motors is expected. When using an asynchronous traction electric drive, it is possible to create a four-axle locomotive, including when modernising the existing crew compartments of serial shunting locomotives. 3D sketches of the equipment layout on a battery locomotive and a bogie with two motorised axles are provided using the example of the ChME3 diesel locomotive.