Study of dynamic of a micro grid including photovoltaic power plant

This paper presents a dynamic analysis of a micro grid including Photovoltaic units. A four-bus system including an infinite bus is considered for the simulations. The system is modeled using MATLAB Simulink software package. Different combinations of synchronous generators and PV units are simulated and their dynamic performances during different disturbances are studied in the paper. From these studies it is concluded that using PV units in a micro grid will make the dynamic of the system faster and system reaches to its steady-state point faster using more PV units. But, because PV units have no governor and exciter system (unlike conventional synchronous generators), the steady-state point of the system may be unacceptable (due to under- or over-voltage).