HYBRID MICRO GRID MAXIMUM POWER CONDITION CONTAINING PV/ VARIABLE SPEED WIND GENERATION

Distribution systems with distributed energy resources, such as photo voltaic power systems (PV) and wind turbines form the new planned micro grids (MGs). From the customer point of view, MGs improve power quality by supporting voltage levels and potentially lower costs of energy supply. Despite the obvious advantages of distributed generation, technical challenges associated with the operation and controls of MGs are immense in order to provide stable frequency and voltage in the presence of variable loading and emergency condition. This paper proposes an efficient an overhaul maximum power conditioning control system of micro grid feeds from PV array and wind turbine. The PV power conditioning system utilizes two-stages energy conversion system topology composed of a DC/DC boost converter and voltage source inverter (VSI) that satisfies the MG technical requirements. For the proposed PV maximum power point tracking (MPPT), the boost converter duty cycle is being adjusted to set the operating point of the PV panel at the maximum power point. While for the proposed wind turbine the pitch angle is controlled to allow the wind turbine operates at its optimum condition at low and medium wind speeds, while at high wind speeds region, the pitch angle is being increased to shed some of the aerodynamic power. The dynamic modeling and control of the studied MG are presented for steady state and transient operation conditions. Moreover, the control strategies to obtain the maximum converted power and stabilize the voltage under different operating conditions are derived in the submitted paper.