A New Optimal Current Control Technique for Dual Stator Winding Induction Generator

For remote area distribution networks, brushless generation systems have an edge due to their high reliability. Researchers have found dual stator winding induction generator (DSWIG) to be one of the suitable candidates for this purpose. This paper deals with a unique configuration of DSWIG, which facilitates simultaneous power flow through both the stator windings in extended speed range. Both the windings feed the same dc-bus through corresponding converters. A passively tuned filter across uncontrolled winding has been introduced to improve power quality and supply a part of the reactive power based on an optimization criterion to maximize active power output from the system. A new index called “power sharing ratio” is introduced and a control strategy to distribute power through both the windings is proposed. An algorithm to find the “optimum power sharing ratio” is developed. This is based on maximum output per ampere of winding current. MATLAB/Simulink-based simulation studies have confirmed the efficacy of the control algorithm. Experimental investigations using a dSPACE 1103-based laboratory prototype have demonstrated the usefulness of the proposed system.