A new strategy to control the active and reactive power for single phase grid-connected PV inverter

Renewable Power Systems and in particular Grid-Connected PV Inverter Should not be limited injecting the active power into the grid. However, it must be able to absorb or to generate sufficient reactive power for a certain amount of time according to the grid demand in order to maintain the grid voltage. This paper aims to design a system that controls the active and the reactive power for a Single-Phase Grid-Connected PV Inverter. The new strategy presented is based on dq transformation, after determining the amplitude of the current I_q* in the rotating frame, which means a reactive power quantity that defines the angle phase between the grid current and the grid voltage, the AC reference current generated at the output of inverse dq transformation will be used then for the inverter output current control, without using two feedback control, feedback control for the reactive power and another for the active power.