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The existing compressor plants at railroad marshalling yards (MYs) are equipped with automatic compressed air supply control systems. However, this is implemented using outdated and ineffective methods. Taking into account the current trends in the field of three-phase motor control, as well as the requirements for energy saving, the most effective is the frequency regulation of performance. The work provides a justification for the need to use a variable frequency drive of a compressor unit (CU). A mathematical model has been developed for controlling an asynchronous motor (AM), taking into account the setting coefficient of performance. As a result, a computer simulation model for controlling the drive motor of a reciprocating compressor at an MY has been proposed and tested. The diagrams and values obtained made it possible to study in detail the automatic control system of the drive and select the optimal control laws for the frequency-controlled unit.

The implementation of resource-saving technologies at marshalling yards (MYs) is an urgent task. Taking into account that the main consumer of electricity at the MY is the compressor unit (CU), the solution, first, should be concentrated, on it. An analysis of the operation of modern control systems of the CU, as well as theoretical studies in this field, showed that the cost of electricity at the station is tightly connected with the technological work on it, as well as to the weather conditions in the region. This work proposes to establish the connection of these factors with the energy costs at the MY and to develop a compressor control model. In our publication, we carried out an analysis of external factors, which affect the operation of the compressor plant at the MY.

It is a known fact that the existing compressor stations on the sorting humps of the railways have significant overconsumption of electricity. First, this is due to the lack of automatic regulation of the compressed air capacity, which takes into account the technological processes at the station and the weather conditions within this section. In order to solve this problem, as a first approximation, it is necessary to analyze all the factors affecting the energy consumption of the compressor station and develop a mathematical model, which will link these indicators. In this work, a correlation analysis of the weather-related factors and specifics of the technological process (breaking up of the train), which affect the energy consumption of the compressor unit (CU), is carried out. Based on the analysis, there was a strong correlation between the factors described and the power consumption at the station. A regression model was developed.

The article presents the results of the development and technical implementation of the automatic modernized system for the control of the compressor unit power at the existing marshalling yard. Existing compressor stations on railroad marshalling yards are equipped with automatic compressed air capacity control systems. Their operability and functioning ensured by traditional methods with a set of typical operations: starting/stopping the engine, connecting an additional “dead volume,” switching the compressor unit to idle and throttling. Taking into account the peculiarities of the technological process of work at the station and the hump, as well as modern requirements for energy saving in transport, the known control methods seem to be outdated and ineffective. In addition, these control methods do not exclude transient surges of currents and voltages, which significantly reduces the service life of compressor units.