Optimisation and control of a grid connected and an off-grid microcogeneration system based on a fuel cell and PV hybrid system

Optimisation and control of an energy efficient system has been developed in this thesis. The system is so designed that it can either operate standalone using a battery or can feed in the grid. Calculations focused on energy efficiency at all particular equipment chosen for this study as well as at the house the system is installed. A microcogeneration system has been installed in the house. Interaction of various energy sources within the house throughout the year has been calculated and simulated using climatic data. Thereafter all the results of these simulations –along with macro -and microeconomic parameters– were used as an input to the feasibility model developed specifically for the study. Control systems have also been developed proving the technical applicability of the hybrid system as well. Finally an optimum system has been studied. Maximum energy efficiency, lowest investment, using preferaby clean energy sources, on grid and standalone operation possibilities were sought as the particular criteria in designing the optimum hybrid system. As a consequence fully standalone system has not been found to be economical in terms of present financial conditions. An optimum hybrid system could be so designed that it can sell the generated excess electricity back to the grid or store the power from the grid in case hybrid system fails to cover the consumption. It has been concluded that standalone microcogeneration systems could well be established through substantial subsidies.