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Permanent magnet wind generators: control strategies to manage voltage unbalances

pubblicazioni - Articolo

Permanent magnet wind generators: control strategies to manage voltage unbalances

L’articolo paragona le prestazioni di quattro differenti metodi di controllo di inverter per applicazioni in generatori eolici a magneti permanenti a fronte di squilibri di rete. I risultati di simulazioni digitali dei diversi sistemi mostrano che le prestazioni migliori si ottengono compensando le componenti di sequenza inversa della tensione.

The paper presents four different control strategies for grid connected voltage source inverters, devoted to theMinterface of permanent magnet synchronous wind generators with the distribution network. A common dq-axes control isMcompared with two modified controls in the dq frame which take into account also negative sequence components of voltages,Mand currents and a control approach in the stationary ab frame which reduces the computational complexity of the control itself.MAn ATPDraw model of a 2 MW wind generator has been developed and employed for simulating the responses of the fourMcontrol schemes to voltage unbalances and voltage dips. The improved control strategies have shown better performances inMterms of reduction of 100 Hz oscillating power components during network voltage unbalances.

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