Alternative Energetics DC Microgrid With Hydrogen Energy Storage System

Abstract

This paper is related to an alternative energetics microgrid with a wind generator and a hydrogen energy storage system. The main aim of this research is the development of solutions for effective use of the wind generators in alternative energetics devices, at the same time providing uninterrupted power supply of the critical loads. In this research, it was accepted that the alternative energetics microgrid operates in an autonomous mode and the connection to the conventional power grid is not used. In the case when wind speed is low, the necessary power is provided by the energy storage system, which includes a fuel cell and a tank with stored hydrogen. The theoretical analysis of the storage system operation is made. The possible usage time of the stored hydrogen depends on the available amount of hydrogen and the consumption of the hydrogen by the fuel cell. The consumption, in turn, depends on used fuel cell power. The experimental results suggest that if the wind generator can provide only a part of the needed power, the abiding power can be provided by the fuel cell. In this case, a load filter is necessary to decrease the fuel cell current pulsations.

IoT solution approach for energy consumption reduction in buildings: part 2. Measurement setup and practical data analysis

“…Every year, the amount of energy consumption in the world increases, therefore also need for new energy saving technologies becomes very popular. Also political decisions in terms of climate protection are closely related with energy-efficiency measures in various countries, where Germany has placed one of the highest targets to be reached, already implementing its "Energiewende" program in various sectors, like in industry introducing novel DC-Grids [1] and industrial robots as reused energy sources [2], as well as university campus grid infrastructure could be changed by implementing renewable energy systems, stationary storage, charging infrastructure [3]- [4]. The tendency shows that in future existing consumers will become prosumers, using a decentralised approach with the need to manage and measure electrical loads within each building.…”

A Methodology for the Estimation of the Wind Generator Economic Efficiency

“…• strategic objectives of the use of the renewable energy sources [1]- [3]; • political aspects [4]- [6]. One of the most important economic benefits of wind power is the reduction of economic dependence on fossil fuel.…”

“…According to [14], it was decided [3] that the DC microgrids were necessary for integration of renewable sources. Therefore, the proposed methodology is based on the power relations in the DC microgrid with a wind generator as the main energy source [13].…”