Charge and discharge control of flywheel energy storage

4 FAQs about [Charge and discharge control of flywheel energy storage]

What is a flywheel energy storage system?

The flywheel energy storage system topology studied in this paper is shown in Fig. 1, and consists of a flywheel with large inertia rotor, bearing system, vacuum chamber, housing, PMSM (motor/generator), machine-side converter, DC bus voltage stabilization capacitor, grid-side converter, filtering inductors, and other components.

What is the grid-side control strategy of the flywheel energy storage system?

Block diagram of the machine-side charge and discharge control of the flywheel energy storage system. The grid-side control strategy of the flywheel energy storage system combines grid voltage-oriented vector control and SVPWM (Space Vector Pulse Width Modulation) technology.

How can flywheels be more competitive to batteries?

The use of new materials and compact designs will increase the specific energy and energy density to make flywheels more competitive to batteries. Other opportunities are new applications in energy harvest, hybrid energy systems, and flywheel’s secondary functionality apart from energy storage.

What is the difference between SMO and Flywheel energy storage systems?

Most current research on SMO algorithms primarily focuses on motor control 30, whereas flywheel energy storage systems exhibit a more complex back-to-back structure, high operational speeds of the flywheel and motor, large system inertia, fast charging and discharging rates, and frequent switching of control strategies 31, 32.

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