• Distributed control
• Droop control
• micro grid
• Smart grid
• Virtual impedance

Microgrids can be considered the building block and the backbone of the new way of thinking the
electrical grid, the smart grid. Integration of control theory, information technology and electronic
power plays an important role in closing the gap with this new paradigm which is considered an
important step towards integration of renewable sources of energy, new economic opportunities and
an overall safer and more efficient electric distribution net.
This thesis has been developed in cooperation with the Loccioni group. The contribution of this
thesis are threefold: (i) a realistic model of their microgrid was implemented in a Matlab/Simulink
environment; (ii) a control system was designed to achieve stability of the whole system and to obtain
plug and play inverters, that can work without central controllers; (iii) the developed algorithms were
implemented in a PLC environment.
The solutions implemented within the thesis work are being currently implemented in the real
microgrid at Loccioni.