In addition to making it possible to continue using renewable energy sources when weather conditions are unfavorable, this also improves the reliability and stability of the power supply overall. The article covers the pros and cons of major energy storage options, including thermal, electrochemical, mechanical, magnetic and electric systems.
When needed, the flywheel is slowed and the kinetic energy is utilized to create power through a generator. In general, the following are the pros and cons of using mechanical energy storage for renewable energy sources: Simple to maintain (compressed air energy storage).
It is suitable for high power requirement. But there are many disadvantages such as high cost, low energy density and complex maintenance . The comparative analysis of electromagnetic energy storage technology is shown in Table 3.
Even if the energy storage has many prospective markets, high cost, insufficient subsidy policy, indeterminate price mechanism and business model are still the key challenges.
The flywheel energy storage has the advantages of high efficiency, fast response, long service lifespan, less demands on operation and maintenance, good stability, short construction period, small footprint and no pollution, but the energy density is low, easy to be self-discharge which is only suitable for short time applications [36, 37].
The development and commercialization of energy storage technology will have a significant impact on power system in terms of future system model . In recent years, both engineering and academic research have grown at a rapid pace, which lead to many achievements.