This paper provides a smart photovoltaic (PV) inverter control strategy. The proposed controllers are the PV-side controller to track the maximum power output of the PV array and the grid-side controller to control the active and reactive... more
This paper provides a smart photovoltaic (PV) inverter control strategy. The proposed controllers are the PV-side controller to track the maximum power output of the PV array and the grid-side controller to control the active and reactive power delivered to the electric grid through the inverter. A Volt-VAR regulator is proposed for controlling the reactive power exchange with the grid according to the voltage at the point of common coupling (PCC). The gains of the proposed proportional-integral (PI) controllers are optimized using a genetic algorithm (GA) via adaptive online tuning. The control methodology is then tested to a 33-bus radial distribution network under MATLAB/SimPowerSystem environment to prove the validity of the proposed control methodology and to analyze the interactions between the PV-based distributed generation (DG) and the power network. The optimal control of PV inverters demonstrated that the optimized Volt-VAR control strategy is both efficient and effective. The optimization of the PI controller parameters resulted in a good dynamic response under varying climatic conditions. The proposed control method enables the most efficient utilization of PV-DG systems by extracting maximum power and contributing to grid voltage support.
In this study, a control of a single phase standalone transformerless photovoltaic (PV) inverter is presented by simulation. The system power electronic converter structure is constituted of DC-DC boost converter and HERIC (Highly... more
In this study, a control of a single phase standalone transformerless photovoltaic (PV) inverter is presented by simulation. The system power electronic converter structure is constituted of DC-DC boost converter and HERIC (Highly Efficient and Reliable Inverter Concept). The system control is realized by conventional PI controller and LCL filter is employed in the inverter output.