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Abstract

Purpose. Increasing the efficiency of agricultural production and improving the living conditions of the rural population by creating a reliable autonomous power supply system based on its own renewable energy sources. Methods. The substantiation of the structure and parameters of the autonomous electric power system of the economic level was carried out on the basis of the provisions of probability theory, mathematical statistics and simulation modeling using a specially developed reliability assessment model of various variants of autonomous electric power systems for agricultural purposes. Results. The model for assessing the reliability of autonomous electric power systems of the economic level was developed on the basis of the structural and functional organization of systems with the determination of the probability of failure-free operation. The reliability of the system is determined by the reliability of its subsystems and their interconnection – structure. The main method of increasing the reliability of power supply systems is the redundancy method, which consists in introducing additional subsystems into the system. Serial and parallel connection systems are considered. An important element of ensuring high reliability of autonomous power supply systems of agricultural production facilities is appropriate means of energy accumulation. The structure of the specific electricity supply system of the agroindustrial economy should be formed on the basis of the characteristics of production and household needs, assessment of the potential and characteristics of renewable energy sources and the conditions of safe, economically and ecologically efficient operation Conclusions 1. Effective operation of a modern farm with complex automated human activity in close harmony with living objects is possible only under the condition of absolutely reliable power supply, including on the basis of own renewable energy sources. 2. Among the natural RES, the most reliable source for farming conditions is the energy of solar radiation. 3. From the point of view of organization of application, availability of raw materials and possibilities of necessary maintenance, solid biofuel has certain advantages in the conditions of rural areas (the energy cost-output ratio is 1:16). 4. A rational option for a farm can be considered an autonomous power supply system consisting of: a solar power plant, a biofuel power plant, a storage battery – with an estimated reliability index of 0.9997. Keywords: autonomous electric power systems, reliability, solid biofuel, renewable energy sources, power supply, heat supply.