Energy Storage Techniques According to the specific principles, there are three main types of energy storage systems (ESSs): (i) Physical energy storage including pumped hydro storage (PHS), compressed air energy storage (CAES), and flywheel energy storage (FES); (ii) Electromagnetic energy storage including superconducting magnetic energy storage (SMES), super-capacitor energy storage (SCES); (iii) Electrochemical energy storage […]
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