Abstract
The paper deals with a variable-speed induction generator, aimed at supplying an autonomous power system. Reactive power requirements of the generator are met by a static reactive power compensator of voltage source inverter (VSI) type. Control of the compensator is achieved using rotor flux oriented control principles. Detailed mathematical modelling of all the components of the system under consideration is described. Induction generator is represented with an appropriate saturated machine model and a novel, saturation adaptive, rotor flux estimator is used to achieve correct field orientation under all operating conditions. Dynamics of self-excitation process, step application of a three-phase load and variable speed operation are simulated. Excellent tracking of rotor flux reference is achieved under all operating conditions, including operation with speeds higher than rated.
Published Version
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