  As the concern about climate change and energy shortage grow stronger, the
incorporation of renewable energy in the power system in the future is
foreseeable. In a hybrid power system with a large penetration of PV
generation, PV panel is regarded as a negative load in the power system. With
the accurate prediction of PV output power, load frequency control could be
done by controlling the thermal and hydro power plant in the system. Combined
Cycle Power Plant is widely used because of its great advantages of fast
response and high efficiency. This article is focusing on the mathematical
modelling and analyzing of Combined Cycle Power Plant for the frequency control
purpose in a model of hybrid system with large renewable energy generation.
