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.

Keywords

• Waste Energy Recovery System, Ultrahigh Speed Drive, Subharmonics, Self Excitation

References

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38. Rated parameter of USIM Symbol Name SI pu Pn ˆ V1 5 kW Peak value of phase voltage V pu ˆI Peak value of phase current 5 pu f1n ˆ 1 Hz pu Peak value of stator flux 8 mVsec 1 pu τn Rated torque 4805 Nm 1 pu τbm
39. Maximum torque in mot. mode 156 Nm sb slip at max torque 0275 sn rated slip 00642 21 Ω 1565 Ω 98 Ω 98 Ω 6 Ω Xm magnetizing reactance p number of pole pairs Tm electromechanical time constant 46 s