Pumped hydroelectric energy storage, compressed air energy storage, flywheel energy storage, superconducting coil energy storage.
1. Pumped Storage: This is a method of storing mechanical energy. A reversible turbine generator converts electrical energy and the gravitational potential energy of the water stored in the upper reservoir.
2. Air Compression Energy Storage: This is a method of mechanical energy storage that uses air compressors and turbines to convert electrical energy into the potential energy of air stored in a closed air chamber.
3. Flywheel Energy Storage: This is a method of mechanical energy storage that uses a motor (generator) to convert electrical energy into rotational kinetic energy of the flywheel.
4. Superconducting coil energy storage: This is a storage ofinductive energy that stores DC electricity in the form of a magnetic field in a superconducting spiral tube.