Power Quality in Power Systems and Electrical Machines, 2nd Edition

Problem 11.17: Design of a 50 MW Flywheel Storage Power Plant

Design a flywheel storage system which can provide for about 6 minutes (= 0.1 h) a power of 50 MW, that is, energy of 5 MWh. The flywheel power plant consists (see Figure P11.17.1) of a flywheel, mechanical gear, synchronous machine, inverter-rectifier set and a step-up transformer. The individual components of this plant must be designed as follows:

Figure P11.17.1 Flywheel power plant (start-up time of a few 60 Hz cycles).

a) Possible flywheel configurationsFor the flywheels (made from steel) based on a spherical (R_1o = 1.5 m), cylindrical (R_1o = 1.5 m, h = 0.9 m), and wheel-type ...