Seminar on

Grid Energy Storage

Presented by

Md Raheel Ahmed

Introduction Simplified electrical grid with energy storage Forms of Storage

Air,Batteries,Electric vehicles ,Flywheel,Pumped Storage Hydroelectricity,Superconducting Magnetic Energy

Economics Benefits

Compressed air:

Compressed air energy storage is a way to store

energy generated at one time for use at another time

using Compressed air.

Liquid air :

Compress and cool air, turning it into liquid air ,

which can be stored, and expanded when needed,

turning a turbine, generating electricity

>85% efficient to start an engine to recharge the batteries.

A parked and plugged-in electric vehicle could sell the electricity from the battery during peak loads and charge either during night (at home) or during off-peak

When the electric power flows into the device, an

electric motor accelerates a heavy rotating disc. The motor acts as a

generator when the flow of power is reversed, slowing down the

disc and producing electricity.

Hydroelectricity is used to even out the daily generating load, by pumping water to

a high storage reservoir during off-peak hours and weekends, using the excess

base-load capacity from coal or nuclear sources.

Superconducting magnetic energy storage (SMES)

systems store energy in the magnetic field created by

the flow of direct current in a superconducting coil

which has been cryogenically cooled to a temperature

below its superconducting critical temperature.

Cost : The cost of storing electricity using batteries is

said to be 7.40 Rs/KWh.

Load leveling

Energy demand management

Portability

Electric supply

Grid stabilization,

Grid system >Discharge during peak demand: reduce

transmission capacity requirement

Renewable energy integration

Reliable voltage,power