Performance of an autonomous single-phase induction generator with a bidirectional PWM inverter-battery system in the auxiliary winding

A stand-alone, single-phase induction generator scheme suitable for producing both controllable load voltage and frequency is set forth. This scheme has a potential utility in industrial and commercial applications. A bi-directional, single-phase PWM inverter-battery system connected to the auxiliary winding of the generator supplies the generator reactive power, with the battery either absorbing excess power provided by the turbine or supplying deficit power to meet the active power demand of the load connected to the main winding. Analytical and computer simulation work are undertaken for a generator feeding an impedance load using two different PWM control schemes. Some of these results are correlated with experimental results, confirming the viability of the generator scheme proposed.