Abstract
At present, the designing of a power supply system for mine sections is performed in accordance with obsolete regulatory documents made in the early 90s of the 20th century. This slows down the implementation of the ‘digital mining operation’ concept and prevents the full potential for energy savings from being realized. At the same time, development of digital technologies makes the issues of computer simulation of the power supply system of the coal mine sections urgent. Simulating computer modelling is required to develop measures for increasing the efficiency of the power supply system of operating coal mines as well as for designing new coal mines. The article offers the methodology of forming simulation computer models for evaluation of the energy efficiency of the power supply system for a coal mine section. To ensure the correct development of active and reactive power consumption profiles, it is proposed to use scenario approach to modelling dynamic processes. As an example of using the proposed approach, one of the scenarios for the operation of power supply system of a mine section at one of the coal mines of Kuzbass is reviewed here. The proposed approach to scenario modelling of operating modes of a mine section ensures the correct modelling of dynamic processes for the subsequent assessment of the effectiveness of the use of intelligent devices for controlling the flows of active and reactive power, which will make it possible to accurately assess the effect of FACTS devices on the level of active power losses, as well as the quality indicators of the electrical energy. The proposed methodology can be used in the development of computer-aided design systems for the design of energy-efficient power supply systems for extraction areas.
Highlights
Development of underground coal mining is characterized by constant improving of mining machinery and mining processes:- In the 40s-60s of the 20th century, underground mines had quite a low level of automation
The coal industry is at the stage of digitalization, as a result of which the maximum automation of all technological processes should be achieved in mines
The rapid digitalization of coal mining enterprises requires the development of simulation modeling methodology in order to obtain computer models of a high degree of reliability
Summary
Development of underground coal mining is characterized by constant improving of mining machinery and mining processes (see Fig. 1):. In terms of the electrical complex, the decrease in the rate of digitalization is due to the fact that, despite the increase in power supply per production unit, the design of power supply systems (PSS) for the extraction working areas of coal mines is still carried out in accordance with the obsolete "Instruction on the design of electrical installations of coal mines, open-pit mines, processing and briquette factories"(1993) (hereinafter referred to as the Instruction) In connection with the above, it is required to develop simulation computer models of the electrical complex of extraction areas, which allow the formation of a methodology for designing of power supply systems for a digital mining enterprise. It should be noted that computer simulation is necessary to create adequate mathematical models that allow, together with the information model, to ensure the creation of a digital twin [15] sufficient to perform the following actions: reliable display of the state of the object in real time; reliable prediction of object behavior under normal and abnormal operating conditions; reliable generation of controlling actions on the object
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