Question

Large scale energy storage for the electric grid is desirable to (check all that apply)

allow increased use of renewable energy sources

easily match power production and demand

directly store electrical energy on the grid

reduce the operating voltage of the transmission system

increase the total installed generating capacity

Answer 1

1. Large scale energy storage is necessary for electric grid and is desirable to

a) allow increased use of renewable energy resources

Where there are renewable energy resource plant associated with a electric grid, if their production exceeds the consumption, the excess energy can be stored instead of wasting so that in peak demands the grid can be avoided to work at peak capacity.Reduces need for increased peak generation capacity

b) easily match power production and demand

If suddenly there is a change in demand, the plant should be able to satisfy the demand. So if there is a energy storage, the sudden increase in demand can be easily met with out any delay.

e) As the plant will get additional power from renewable resources the installed generating capacity of the plant increases. But this storage will reduce the need of the plant for increased peak generation capacity

The storage systems store energy in the form of mechanical energy, hydro energy, in batteries etc using different techniques.The operating voltages are tried to maintain within the specifications, rather than at reduced levels to avoid energy loss transmissions.