On the control and stability of grid connected photovoltaic sourcesOn the control and stability of grid connected photovoltaic sources Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-09-281987enA methodology is proposed for the effective integration of photovoltaic (PV) devices into the electric utility distribution network operations. The dispersed PV generator is viewed as an active device used to improve system stability by appropriately modulating the power conditioning unit's output power. Disturbances on the utility system can be damped out by injecting this power into the grid in such a way so that the net effect is a cancellation of undesirable oscillations. The approach is implemented by monitoring the oscillating power and generating control signals which shape accordingly the interface unit's output power. Successful implementation of the scheme relies heavily on the speed and flexibility with which the electronic inverter moves power from the primary source/storage facility to the utility lines. Simulation studies, using the proposed control approach, indicate that application of these policies may result in reduced load following requirements for conventional power generating units, increase the value and acceptability of new energy technologies, and improve power quality and stability of the interconnected system.Δημοσίευση σε επιστημονικό περιοδικό http://creativecommons.org/licenses/by/4.0/Energy Conversion, IEEE Transactions on 4EC-2556-562 Kalaitzakis Kostas Καλαϊτζακης Κωστας Vachtsevanos, G.J Institute of Electrical and Electronics Engineers Distributed power generation Inverters Photovoltaic energy systems Photovoltaic facilities Photovoltaic power plants Photovoltaic solar generating plants Power plants, Photovoltaic Power systems, Photovoltaic photovoltaic power systems photovoltaic energy systems photovoltaic facilities photovoltaic power plants photovoltaic solar generating plants power plants photovoltaic power systems photovoltaic Power conditioning Power generation Power industry Shape control Signal generators Solar power generation Stability