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A flywheel energy storage system (FESS) is associated to wind turbine (WT) to increase its penetration rate into the grid and to improve its contribution to the ancillary services. In this paper, the authors investigated a FESS associated to PMSM-wind turbine connected to the grid via a three-phase PWM inverter. The FESS is controlled by a FOC (flux oriented control) strategy cascaded with an external...
A model of the directly driven wind turbine with permanent magnet synchronous generator (D-PMSG) was described in this paper. The D-PMSG was connected to a host AC power grid by a full scale power converter system which comprised two back-to-back PWM voltage source converters (VSCs) and a common DC-link. Active and reactive power of the two VSCs were controlled independently by employing PI current...
In direct-drive wind turbine systems, a dual PWM converter for grid interface and its control strategy are presented. Following introducing the full-size AC-DC-AC converter, the principle and advantages of the dual inverter are analyzed. With the proposed method it not only divides high-level currents, making existing equipments apply to large-scale systems, but also reduces the current ripple amplitude...
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