Application of Ultrahigh Speed Induction Machine for Waste or Renewable Energy Recovery

Abstract

Applications of Ultrahigh Speed Induction Machine (USIM) in a system developed for utilization of renewable and waste energies is described. It can be applied in Distributed Generation Systems. The energy conversion is made by a turbine-generator set. USIM has a number of technical and economical benefits over synchronous generators. The following studies are presented: scalar speed control of the turbine-generator set applying an accurate and approximate model, the adverse effect of subharmonics generated by the PWM controlled voltage source converter and a novel self-excitation method developed specially for ultrahigh speed induction generators.