Components of the Daily Power Consumption Profile of a Coal Mine

The article is dedicated to analysis of the power consumption modes of coal mines and determination of their indicators in the context of implementing various methods of energy supply. The authors of the article analyze the advantages and disadvantages of centralized and decentralized (combined) methods of enterprise energy supply, and given the current trends in the Ukrainian energy system, this analysis allows us to state that the second option is increasingly more expedient. However, the economic and technological conditions of any method of energy supply encourage enterprises to implement certain measures to regulate the power consumption modes which consist in shifting the operating hours of powerful regulatory consumers throughout the day without causing damage to the technological process. The authors emphasize that such measures can significantly change the estimated (actual) maximum electrical load of a coal mine, which, depending on its new level, may have both negative and positive consequences for the enterprise's power supply system. Under such conditions, determining a new value of the maximum electrical load using known methods will not allow obtaining a correct result due to the failure to consider the modern trends for regulating the power consumption modes. Therefore, the article proposes to determine the maximum electrical loads of coal mines based on modeled group power consumption profiles, taking into account the new operating modes of technological plants which meet the requirements of the enterprise's power supply system (centralized or decentralized). To this end, the authors have classified the mine's electrical receivers according to the indicators of their individual electrical loading diagrams into three groups - with uniform, stage and random power consumption. This made it possible to determine the constant and random components of the group daily power consumption profile for a coal mine.