Fractional-Order Based Droop Control Of An Universal Wind-Turbine System

In this paper it is investigated the use of fractional-order controllers for an universal operation of small-power wind turbine system. Universal inverters should be able to work both connected to the grid both in island mode. Proper active/reactive control strategies are needed to get system work in universal operation. The aim of this paper is to investigate the use of fractional PI (PIα) for active and reactive power control of an universal wind turbine system in order to achieve a better trade-off between dynamical response and stability. The effectiveness of the proposed control method is verified by simulation and experimental results.