Autonomous hybrid system of combined energy supply with renewable energy sources
DOI:
https://doi.org/10.15276/opu.1.71.2025.08Keywords:
hybrid system, combined energy supply, renewable energy sources, wind power plant, solar power plant, mathematical modelling, parameter optimisationAbstract
The paper proposes a configuration of HSERES for the autonomous provision of electricity and heat supply to households, taking into account the energy potential of wind and solar energy in the Odesa region. The experimental climatic data on solar insolation and wind speed obtained from the meteorological station of the Odessа Polytechnic National University are generalised. The parameters of the wind speed distribution according to the Weibull function are obtained: the shape parameter, the scale parameter, and the mathematical expectation of the wind speed. The expressions for the integral repeatability function and the density function of the wind speed distribution are obtained. A methodology has been developed to determine the configuration and optimal parameters of a HSERES for individual households according to the criterion of minimising the cost component, which includes the costs of operation, repair, maintenance and capital expenditure in the generating capacity of the system. The optimisation problem was solved in Excel spreadsheets using the “Solution Search” option. The result of the solution is the optimal values of the total cross-sectional area of the wind turbine blades and the total area of photovoltaic panels that meet the conditions of the problem. The dependence of the configuration and parameters of the HSERES on the efficiency of the installed capacity and economic indicators of the system is investigated. During the autonomous operation of the HSERES, the excess energy potential of wind and sun is not used, as it requires seasonal accumulation of electricity, which is economically inexpedient and technically inefficient. The inclusion of an autonomous heat supply system in the configuration of the HSERES has led to a significant increase in the share of wind power generation capacity compared to the share of solar power plants. It is confirmed that the seasonal change in the energy potential of wind and solar resources can be mutually compensated by integrating two different in nature RES into a single system and optimising their generating capacities.
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References
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