A novel control method for voltage regulation and island detection of a DC microgrid connected photo voltaic converter system

This paper presents maximum power point tracking, bus voltage regulation and island detection of a photo voltaic panel using One Cycle Control (OCC). The power generation by renewable energy sources depends highly on atmospheric conditions and due to that they are very chaotic in nature. Hence rapid control becomes an essential requirement for the converters used for power conditioning. Conventionally PI controller is used for the control of power electronic circuits employed in such systems. But PI controller takes few switching cycles to track the variations in operating conditions while the OCC can track them within one switching cycle. Moreover compared to PI, OCC has a better transient response. Short current pulse based maximum power point tracking is used here. An island mode detection based on input current perturbation is also explained. MATLAB/Simulink simulation results demonstrate the performance of OCC.