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The paper is concerned with the active and reactive power flow between the doubly fed induction generator harvesting wind power and the grid controlled by the rotor side converter. After deriving the basic equations in Appendices it builds up a block diagram for studying the dynamic processes and it applies them for investigating the slip - rotor current characteristics where rotor voltage components...
The paper proposes an adaptive sliding observer to accurately estimate the rotor position for a direct-drive permanent magnet synchronous generator (PMSG). Without any position sensor, the generator torque and flux responses retain high performance both in the steady state and during transients. The problem on the shaft encoder installation difficulty, reliability and disturbance in encoder cable...
Using of the wind energy has become increasingly important as a renewable energy source and therefore is an increasing interest in exploiting it using a switched reluctance machine as a generator and optimize its characteristics in this domain. This work analyzes the generator mode of the switched reluctance machine in the direct coupling to the turbine shaft and coupled to the shaft through a gearbox.
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