کنترل توان و فرکانس بار مبتنی بر روش کنترلی شیب افتی بهبودیافته در سیستم‏ ترکیبی توربین بادی، فتوولتائیک و پیل سوختی در ریزشبکه‏ های مستقل

One of the major challenges in standalone micro-grids (MG), is the frequency control. In this paper, a method for frequency control in a hybrid system based on wind turbine / photovoltaic / fuel cell and super capacitor is proposed. The proposed method is a combination of load frequency control and super capacitor voltage control. To determine the references power, PI controller and modified droop controller are used. System performance based on wind speed, solar radiation and the demand curve has been studied. The simulation results show that the control with modified droop method is better for damping the frequency deviations, due to sending appropriate control signals to the generation units for balancing the network. MATLAB/ Simulink software environment is used for computer simulation.