Limit cycle based simple MPPT control scheme for a small sized wind turbine generator system-principle and experimental verification

This paper proposes a quite simple maximum power point tracking (MPPT) control scheme for a small sized wind turbine PM synchronous generator system with a diode bridge rectifier. The output DC power is controlled by additional boost chopper and PWM inverter stages. Although no information on generator side is needed, e.g. rotating speed, torque nor instantaneous power, the generated output power is automatically maximized by utilizing the inherent limit cycle phenomena of the system itself. This paper focuses on the basic principle of operation and its experimental verification with an indoor small sized wind tunnel equipment.