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Permanent magnet synchronous generators are mostly designed without an explicit damper cage. When feeding into an intermediate d.c. circuit via a diode rectifier, as in small-scale wind turbine systems, the currents induced in conductive rotor parts may influence the generator operation. A simplified model is used to study sub-transient machine behavior. In quasi steady-state harmonics of order 6th...
In this paper the operation of brushless exciter is investigated and a suitable model for use in time-domain simulation of power systems is derived. An efficient voltage-behind-reactance synchronous machine model is used for the exciter. The theoretical equations, describing the operation of rotating rectifier in three rectification modes are derived. The proposed model was verified in time domain...
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