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In this paper, a reduced switch AC-DC-AC converter is used as a distribution static compensator (DSTATCOM) and induction motor drive. The AC-DC-AC nine switch converter (NSC) is a reduced switch topology of conventional 12-switch back to back converter. With a 25% reduced switch count, NSC has lower losses when operated at constant frequency mode compared to twelve switch converter (TSC). The idea is to operate NSC input terminal as an active front-end rectifier to mimic synchronous generator (SG) operation. The induction motor is connected at the output of the NSC for irrigation application where no speed regulation is required. In distribution generation (DG), a large capacitor bank is used to deliver required reactive power. This may lead to over-voltage at the point of common coupling (PCC) when the load is turned off. To manage reactive power transfer at PCC, a control scheme is developed for NSC such that it can absorb or deliver reactive power with induction motor drive. Similar to SG, V-curve and inverted V-curve is plotted. The simulation and hardware results prove the feasibility of the proposed system.

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Induction motors are still popular in industries amongst the several types of motor due to its simple, robust and maintenance free construction. With the fast progress in transport industry the need exists for ac machines with higher power per unit. Six phase induction motor is a solution where higher power per volume is required such as for electric vehicle application. In this paper, six phase induction motor is operated by compact nine switch inverter. Space vector modulation technique is incorporated to operate nine switch inverter for six phase induction motor drive.

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