Modeling and research of power supply systems with renewable energy sources and hydrogen fuel cells

Abstract

Currently, the creation of environmentally friendly energy systems, including only renewable energy sources, is an urgent task. In this paper, such an autonomous power supply system (microgrid) for isolated consumers is investigated. It includes photovoltaic converters, wind turbines, an electrolyzer, fuel cells, electrical energy and hydrogen storage. For its study, an original optimization mathematical model was used. The optimal structure of the system and its operation modes are determined according to the criterion of minimum total discounted costs, taking into account energy balances and a number of additional conditions and constrains. It is shown that the use of energy sources of various types and energy storage devices makes it possible to smooth out the uneven generation of solar and wind power plants. It has been established that it is expedient to use electric batteries for short-term, and hydrogen accumulators – for long-term energy storage.