Hybrid Control Method for Grid-Connected Photovoltaic Converter

A grid-connected photovoltaic (PV) system is the least expensive and lowest-maintenance option for a home solar electric system. A grid-connected solar PV system consists of solar cells for energy extraction from the sun and power converters for grid interface that converted the output dc voltage into ac. In this paper, an innovative control method for gridconnected PV converter is proposed. This method can control the injection of power created by solar arrays into the network; compensate reactive power, and harmonics of load currents. The proposed type of control permits to supply the power consumption load (active and reactive) in the case of grid failure. One of the most significant benefits of this technique is that if the power produced by solar arrays is less than power of inverters, the rest of capacity could be used to compensate reactive power and filtering harmonics of load currents so as to make the current drawn from the grid completely sine at unity power factor.