A hierarchical control structure is proposed for hybrid energy systems (HES) which consist of wind energy system (WES) and\nenergy storage system (ESS). The proposed multilevel control structure consists of four blocks: reference generation and mode\nselect, power balancing, control algorithms, and switching control blocks. A high performance power management strategy is used\nfor the system.Also, the proposed systemis analyzed as an active power filter (APF)with ability to control the voltage, to compensate\nthe harmonics, and to deliver active power.The HES is designed with parallel DC coupled structure. Simulation results are shown\nfor verification of the theoretical analysis.
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