Hybrid – Grid interactive Power System with PLL based Controlling System

The proposed structure is a PLL (Phase-locked loop) controlled hybrid power generation system. The system comprises of a solar as well as a fuel cell as the main power sources of the electrical energy as well as the system is connected with the three-phase grid which is the main source of power in case of unavailability of the renewable sources. The main purpose of making the system grid-interactive is to prevail over the restrictions of renewable sources. In the PLL the grid frequency is taken as the reference according to which the inverter output is proscribed appropriately also an LC filter is commissioned to reduce the harmonics from the inverter output.