Decoupling Current Control and Maximum Power Point Control in Small Power Network with Photovoltaic Source

Often renewable energy sources in distributed generation systems are interfaced with the electric grid through power electronic inverters. The power control, which is usually performed by acting on the system current, is an important issue in power systems. This paper presents a study of two different control methods for voltage source inverter connecting the photovoltaic (PV) cell to the grid. Two methods of decoupled current control are modelled: feedforward and feedback decoupling methods. They have been implemented in dq reference frame. The maximum power point (MPP) tracking method for PV cell based on perturb and observe approach is presented. Case studies for different temperature and irradiance conditions are simulated