Algorithms development for the energy management of a micro combined heat and power unit in an AC-DC microgrid (original) (raw)

In the past few years, a lot of research has been done in the field of Microgrids (MG) and Smart Grids (SG). The goals of them are to make the power infrastructure more reliable, effective and to incorporate Distributed Generations (DG) for example Renewable Energy Sources (RES), Combined Heat and Power (CHP) systems, Batteries in an efficient and cost-effective manner. Nowadays, roof top solar systems and micro CHP have become really popular for home usage. With the installation of solar Photovoltaics (PV), and micro CHP (mCHP) users are already participating in the operation of DC-AC systems. Therefore, it is important to control their usage. This can be done using an Energy Management System (EMS). The whole system (home and power grid) can be controlled on various parameters. These parameters can include power generated from solar PV, mCHP and power grid, state of charge of battery, AC and DC load demand, price of power, selection of renewable or grid power by the user, etc. The purpose of this paper is to develop appropriate control algorithms for the energy management of DG units in an AC/DC Microgrid which mainly incorporated PVs units (PV), mCHP and Batteries. The main focus is on the energy control and management of the mCHP system in order to meet the consumers' electrical and thermal needs and to minimize the power flow from the main power grid. All algorithms have been implemented with the Matlab program.