Dynamic model analysis and control of a grid connected wind energy system integrated with a super-capacitor bank

This work presents a wind conversion system with integrated energy storage. The generated power from renewable source is processed by independent dc-dc converters and provided to a dc bus in common with energy storage. The energy storage acts as an auxiliary source to mitigate the wind power fluctuations and to follow the load demand changes, once wind source employment is not desired, the supper capacitor bank is used as backup, in order to keep a dc critical load continuously supplied. From proper process, the dc bus power is delivered to the main grid with high power factor. This paper presents all theoretical analysis referring the proposed system, including the dynamic model for and the control strategy for the system operation on grid-connected mode. Performance of the system in various modes of operation is evaluated based on simulation results in MATLAB environment in order to validate the system operation.