Application of probability theory elements in solving electric power problems

The paper discusses methods of probability theory used in the educational process for training specialists majoring in engineering. Random events can be found in energy as much as in other human activities. Energy systems include many energy-generating and energy-transforming apparatuses; the number of energy-transforming devices is particularly large. The operating conditions of a large set of even homogeneous technical devices differ from each other and are random. A device (electric motor, lighting fixture, heater) may be randomly switched on or off, operating at different outputs. As a result of the superposition of such random events you get a particular value of power demand in the power system, depending on the set of random events. Failures of individual elements or reduction of the available capacity from contamination of boiler heating surfaces, turbine flow parts, etc, are also accidental events resulting from the superposition of unfavorable conditions. Failures can create interruptions in the power supply if there is no reserve capacity available in the required size.