HOMER ENERGY AUTONOMY FULL
In addition, our proposed system is to establish full renewable energy autonomy by ensuring all electricity load on site are served and zero energy shortage throughout the year. Less excess electricity is produced during the summer due to the lower wind speed and higher demand from the site. The grey columns represent the excess energy that will be exported to the grid. The graph below represents the electrical supply and demand of Mackie’s of Scotland with our proposed system. The hourly demand profile was scaled up to approximate 4 GWhr a year as provided. Hence, assumptions were made to create a domestic demand profile for the simulation in Homer. In the case study of Mackie’s Scotland, the provided demand profile is in monthly basis. Hence, the demand profiles of the industries play an important role in establishing full renewable energy autonomy. Any unmet electrical load would cause disruptions to the operations of the industrial site, which can lead to severe capital losses. In order to achieve full renewable energy autonomy, the power supply and demand of the site must be balanced throughout the year.
HOMER ENERGY AUTONOMY GENERATOR
The AC bus houses the electric load of the site, biogas generator and the wind turbines while the DC bus houses the solar panels and Li-ion batteries. The excess solar energy can be used directly to charge the batteries.Īs illustrated in the schematic, the system is separated into AC and DC bus with converter as an intermediary component in dealing with the transition between the two. Solar energy from the PV panels are on the hand would be converted from DC to AC through an inverter unit to be fed into the grid or to the site. Energy discharged from the batteries will be converted to AC through the inverter to meet the demand before the biogas generator is fully functioning. The energy generated from the wind turbines and biogas generator would be converted from AC to DC through a rectifier unit to charge the batteries and to meet the demand of the site. To allow analysis to be performed on Mackie’s Hybrid Energy Generation System with our proposed system of adding a biogas generator as dispatchable energy generation and energy storage as energy buffering, we modelled and optimised the system based on the information provided by Mackie’s Scotland.
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