研究目的
The objective of this paper is to study the advantages and disadvantages of 3 different DC MGs in terms of technical efficiency and environmental impact when meeting the energy demand of a residential building.
研究成果
The 3 MG models presented in this paper are a first approximation of a real DC installation. The purpose is to show that the use of a DC distributed generation system is a feasible option for energy generation considering that the systems modelled are strong enough to meet the energy demand of a standalone building. The models have been detailed primarily focusing on climatological scenarios for the off-grid systems, and electricity prices for the grid-connected system. The technical and economic feasibility of the three systems demonstrates that DC systems can be viable in commercial buildings with DC loads, PV and ESS. This approach shows to be less expensive than the grid-connected system based on fossil fuel generation. In fact, both PV-based facilities (model B and model C), prevent the emission of about 35.05 tCO2, 66.20 kgSO2 and 45.32 kgNOx to the atmosphere during the first year of life.
研究不足
The absence of data about failure rates, it was necessary to build this information from 3 real case studies. The exponential distribution does not take into consideration the factors related to ageing that may also affect the reliability of the system components, especially the batteries.
