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Analysis and improvement of existing sizing methods of the hybrid system “Mini hydropower plant-solar photovoltaic system”

Electricity production using hybrid systems, consisting of hydropower and solar photovoltaic systems is well applied in the world in various combinations, given the design characteristics and power of hydropower plants. These are small hydro power plants, those with a capacity of less than 10 MW and more than 500 kW, and also mini hydro power plants with a capacity of 100 kW to 500 kW are widely used, as well as micro hydro power plants (of 5 to 100 kW). Regarding the sizing of such systems, the literature review proposes different methods, as a three-part method that improves the operation of the hybrid systems for the purpose of higher electricity production, with emphasis on reducing the stochasticity of solar radiation, i.e. electricity production from PV systems [1]. Also, overlaps in the production of hydropower and solar photovoltaic energy are considered, regarding consumption (consumer demand) with optimization [2]. There can be found several written papers dealing with the topic of sizing hybrid systems [3, 4] which leads to the conclusion that in addition to the fact that the mentioned issues are not sufficiently researched, an appropriate methodology for dimensioning the same systems has not been developed yet. This gives the motivation for scientific research and the development of a new method for sizing hybrid systems, which aims to eliminate the identified shortcomings. Also, the goal of planned research is to identify differences in the sizing principles of hybrid systems in which mini and small hydropower plants are used, given the corresponding power ranges.

Hybrid systems ; hydropower ; solar photovoltaic energy ; system sizing

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