The Microgrid of the Reutlingen University consists of four components, which can be divided into following categories:
Generation of electricity or/and heat:
PV-System: There are 5 PV-Systems with 6 modules each. The total Output of PV-generation is 10,2 kWpeak. However the generation is dependent on weather conditions and therefore not stable.
CHP-Unit (Combined Heat and Power): The output of the CHP-Unit is 20 kWhel and 44 kWhth and is in contrast to the PV-System constant and adjustable to the needs of the Microgird
Battery: The Battery is used to store surplus Energy from the PV-System which can then be used again in times of lower generation output . The Battery has a total capacity of 12 kWhel. But only 80% of the capacity is usable, which equals 9,6 kWhel.
There are five consumers in the Microgrid, which have a demand of 10.000 kWhth/year and 25.000kWhel/year. Their demand follows usually Standard Load Profiles (SLP).
All components of the Microgrid are connected to the Energy Management System (EMS) which controls and operates the Microgrid.
Furthermore the Microgrid can be connected to the Utility Grid and could therefore possibly receive or sell energy to it.
A more architectural approach with monitoring details of the actual CHP-Unit of the Reutlingen University can be seen in the following figure: