Among the energy storage system (EES) types based on the form of energy stored (Chapter 7, Section 7.7), mechanical energy storage (MES) systems are one of these technologies. They include pumped hydroelectric storage (PRES), compressed air energy storage (CAES) and flywheels (FWs). PRES technology is suitable for energy management applications that move the power over longer time scales and require continuous discharge ratings of several hours and more. CAES is adequate for short- and long -duration energy management applications, whereas FWs can be used for power quality applications that require rapid response (less than a second), transient stability and frequency regulation. Principles and operation of each technology are described in the forthcoming sections.

Chapter Contents:

• 8.1 PHES system
• 8.1.1 Physical principles
• 8.1.2 Modelling of PHES dynamics
• 8.1.3 Applications
• 8.1.4 Types of PHES
• 8.1.5 Advantages and disadvantages of PHES
• 8.2 CAES system
• 8.2.1 Principles of CAES operation
• 8.2.2 CAES system modelling
• 8.2.3 Advantages and disadvantages of CAES
• 8.3 FW energy storage
• 8.3.1 FES architecture and operation
• 8.3.2 Mathematical relations
• 8.3.3 FES characteristics
• 8.3.4 Applications
• References

Inspec keywords: frequency control; power system transient stability; compressed air energy storage; flywheels; pumped-storage power stations

Other keywords: EES types; transient stability; energy management applications; MES systems; flywheels; mechanical energy storage systems; pumped hydroelectric storage; compressed air energy storage; PRES; CAES; power quality applications; continuous discharge ratings; frequency regulation

Subjects: Other energy storage; Power system control; Control of electric power systems; Stability in control theory; Frequency control; Pumped storage stations and plants; Tidal and flow energy; Storage in mechanical energy