The article consideres the problem of extraction of maximum energy from a solar panel in an autonomous power supply system working with renewable sources under the condition of constant joint operation of a solar panel and a diesel generator. It is proposed to solve the problem taking into account the nonlinearity of the external characteristics of energy sources.
A problem of approximation of the primary energy flow parameters change function by linear approximations to ensure a minimal error is considered in the paper. A representation of the parameters of voltage and internal resistance of equivalent generators of renewable sources as linear functions allows an increase in the level of energy transmitted to the load. To solve the problem set, it is proposed to approximate the primary energy flow parameters change function by the system of Franklin orthonormal functions.
During the research, there was developed methodology to calculate the amount of produced electricity, which is directly based on measured weather conditions for the city of Košice during the last years. According to this calculation we can assume coverage of electricity consumption of the circulation pumps in the heating and cooling system.