Current-fed Maximum Power Point Tracking Control of Hybrid Wind Energy Conversion Systems

The purpose of this paper is to design a wind power hybrid system and improve the efficiency of the wind energy conversion. Based on the introduced hybrid wind power system, the wind power generation system is taken as a controlled current source module to the load connected on a common DC bus. Under the hybrid structure, the output current is controlled to feed to the DC bus and to achieve maximum power point tracking (MPPT). In detail, the voltage of the DC bus is constructed by a high step-up boost DC-DC converter with a battery. Meanwhile, the high step-up boost converter of the wind energy conversion subsystem is connected to the DC bus via the fractional-order PID current control. Based on the accurate current control, the current-fed MPPT scheme is realized for the hybrid structured system. Finally, the experiments are carried out and show the expected performance.