Purpose. To increase the energy efficiency of the electromechanical system of production and distribution of compressed air by applying a new way of controlling the electric drive of the compressor plant. Methodology. The following methods are used: method of parametric optimization (scanning) - to solve the problem of conditional optimization of the duration of the compressor state on each control cycle, with different charges of compressed air Q; method of approximation of the initial data of the electromechanical system; regression analysis - when constructing a nonlinear dependence of compressor performance and loss of compressed air. Findings. The reasons of low energy efficiency of electromechanical system for production and distribution of pressurized air, based on the reciprocating compressor, were considered. Correlation and mutual influence of separate system's elements and their modes of operation were analyzed. The analysis of energy dissipation levels in the elements of electromechanical system was carried out to improve the method for controlling the electrical drive of compressor by applying new engineering solutions. Analytical dependences of the efficiency factor on energy dissipation levels in certain elements of the system and its duty parameters with two-step action of compressor output were established. A mathematical model for calculation of the coefficient of efficiency of the electromechanical system was carried out; the optimization problem for the operation parameters was formulated and solved, with certain assumptions and limitations, upon condition of two-step action of the electrical drive of the compressor. The proposed model is distinguished from existing models by the possibility of operation regimes accounting for all elements of the electromechanical system to determine its energy indicator - the coefficient of efficiency. The results of parametric optimization of operational regimes of the electromechanical system for production and distribution of pressurized air, with different levels of pressurized air consumption, were proposed. Originality. It is proved that with an increase in the performance of air compressors with the proposed method of control, the efficiency of the system increases in comparison with the traditional method for controlling compressors, which increases the energy efficiency of the electromechanical system as a whole. Practical value. The algorithm of control of compressor power consumption, which reproduces the principle of determining the costs of compressed air on the basis of measuring the speed of pressure change in its receiver, is developed, and it allows predicting the duration of the control cycle.

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