This paper gives an overview of the topological variations of multi-winding induction machine and drives. The study is restricted to induction machines having two distributed windings on the stator and a brushless rotor. The mathematical modeling techniques and control algorithms available in literature are highlighted. Being magnet-less and brushless, Dual Stator Winding Induction Machine is highly reliable, maintenance-free and economic. Thus, it possesses the necessary potential to become a part of AC and DC Micro-Grid. Recent research trend shows growth in the application of such generators for off-grid as well as grid-connected systems.

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Dual stator winding induction generators (DSWIG) can provide controlled excitation and hence offer a brushless alternative to traditional synchronous machines or doubly fed induction machines (where a 2 nd supply is injected to the rotor through a converter-inverter systems). These generators are a potential candidate for extraction of power from renewable energy resources such as wind, micro-hydro etc. as these are very robust and require the least maintenance. Such systems are also suitable for on-grid/off-grid operation in a micro-grid. This paper deals with a model reference adaptive system based reactive power controller. The excitation winding of the DSWIG is fed from an inverter and controlled in synchronism with the power winding to achieve rotor flux orientation and direct reactive power control. Extensive simulations on SIMULINK validate the proposed method.

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