Self-excited induction generator with excellent voltage and frequency control

A capacitor-excited induction generator used with a hydraulic turbine in a stand-alone generating system can provide high quality voltage and frequency control not matched by other small generating units. This is achieved without a turbine governor by using a controllable additional impedance on the load side. The control is achieved using a static power converter. The analysis of the system and the design of the power and control system are presented. Measurements from an experimental unit are provided to verify the predicted performance