A fuzzy logic control approach for smoothing of wind and photovoltaic generation output fluctuations

Increasing levels of the wind and photovoltaic systems require innovative ways to manage the fluctuations caused due to the intermittent generation profile. This paper proposes a fuzzy logic based control approach to smooth the power output of the collocated wind and photovoltaic generation system. A first order filter is modified with a fuzzy logic controller which regulates the battery power, the state of charge and pitch angle for smoothing of the output power. The controller adjusts the time constant of the filter based on the state of charge of battery and pitch angle of wind generation system by considering the battery power. The effectiveness of the proposed approach is analyzed by considering the different values of the state of charge.