I am working on a flywheel energy storage system FESS that stores a small fraction of the energy in order to handle wind power fluctuations in grid-connected mode. My questions are:
1. Since the flywheel always rotate at high speeds, to store energy in the FW am I supposed to control the induction motor IM above its synchronous speed?
If yes:
2. How does the Induction machine operate as a motor (to store energy) at a speed above its synchronous speed?
3. The power that I am trying to store is variable (depending on the wind turbine generated active power and the power that need to be delivered to the grid). So using a field weakening strategy will not work. Since the power is maintained at its rated value.
Your help is greatly appreciated. Thank you.
Regards,
Dear Mohamed,
See if the enclosed article can hellp.
Best wishes,
Carlos
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