The operation of a stand-alone, single-phase induction generator using a single-phase, pulse-width modulated inverter with a battery supply

The steady-state and dynamic operation of a novel stand-alone, single-phase induction generator scheme is presented in which the load voltage and frequency are controlled by a single-phase, full-bridge, bipolar pulse-width modulated DC/AC inverter. A battery feeding the inverter supplies real power to the generator when the load demand is greater than the power supplied by the prime mover. When the real power supplied by the turbine exceeds the load demand, the excess power charges the battery. The reactive power requirement is effectively met by the inverter with a shunt capacitor connected across the load. Experimental results obtained from the generator, feeding an impedance load, show that the generator scheme has excellent performance characteristics.