Scientific Journal of KubSAU

Analysis of scientific literature has shown a promising direction in energy saving and in increasing of efficiency of power supplies remote from external networks in Russia is the application of solar photovoltaic power plants. The level of solar radiation on the territory of Russia varies widely from 810 kWh/m2 per year in remote Northern areas to 1,400 kWh/m2 per year in southern areas. We have revealed their main advantages and disadvantages of solar photovoltaic power plants, as well as the purpose, basic features, features selection and operation of inverters and batteries. We have also given a generalized block diagram of three types of solar photovoltaic power plants: autonomous, standby, network. The peculiarities of their work have been presented. To improve the reliability of operation of solar power plants we need to design them according to the modular principle. Modular aggregation has to be applied for stand-alone inverters, where the input and output filters, power electronic circuit and system voltage regulation and protection represent the functional module elements. It is possible to increase significantly the reliability of autonomous inverters and solar PV systems in the complex, using one-phase and three-phase transformers with rotating magnetic field in their design. The advantages and the disadvantages, the peculiarities of the solar PV plants discussed in the article will allow to develop their structural and circuit designs with improved maintenance characteristics in the future

Widespread in autonomous systems, including uninterrupted power supply systems, there are power static (electronic) convertors: rectifiers and inverters, used to match the parameters of the electric power source and the load; they also have a function of voltage stabilizers. Important question is the calculation of key performance criteria at the design stage: power losses, efficiency, reliability, weight and size (for electrical transport systems). The article discusses the methodology of the simplified calculation of the basic criteria of efficiency of inverters and rectifiers. There are schematic electrical diagrams of power rectifiers and inverters, and the basic analytical expression for a simplified calculation of the basic criteria of efficiency of the converters, including their output filters. Each year, we improve the technical characteristics of the probes using new element base, allowing reducing the level of electromagnetic interference generated by power electronic devices. We have also shown perspective directions of the development of power converter technology by using one-phase and threephase transformers with rotating magnetic field in their creation (therefore we increase reliability of operation and efficiency). A promising direction is the construction of converters and autonomous systems in a modular complex, where (in addition to increased system reliability) we simplify its operation, including service