ENSURING THE ENERGY BALANCE IN THE LOCAL SYSTEM WITH RENEWABLE GENERATION.

The aim of the paper is to study the possibilities of providing the local consumer with electricity from renewable sources to reduce dependence on centralized supply. The peculiarity of the task is the random influence of renewable energy and consumption on ensuring the energy balance in the local power system, by choosing the composition and capacities of renewable generation and auxiliary equipment. A storage battery and a conventional fuel generator are considered as auxiliary balancing equipment. A simulation model was applied, which allows taking into account the peculiarities of this system and the nonguaranteed nature of the power of solar or wind plants. The components of the power balance are described as the decomposition of a certain random process, which is a feature of this model. The volume of needs for energy flows between local and centralized energy systems, their variability with different parameters of accumulation and auxiliary generator is calculated. The combination of wind and solar energy makes it possible to reduce dependence on the general electricity grid. The same result is provided by the use of intermediate energy accumulators and an auxiliary source such as a diesel generator. A comparison of the energy balancing indicates the different role of wind and solar energy at different times of the year: the use of installed capacity and the level of energy consumption can vary significantly. Other influencing factors are the speed of battery charging and energy loss during conversion - the consequence is the need for different duration of operation of the auxiliary generator and frequency of its activation. The reliability of the simulated results is verified by comparing them with real examples, the differences are at the level of 5-10 %. The proposed model allows us to choose the configuration of generating and auxiliary equipment with a known mode of electricity consumption, and to evaluate the possibilities of ensuring the energy balance. Bible 23, fig. 3, tab. 9. [ABSTRACT FROM AUTHOR]