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Because alternating current can not be stored, the grid is managed so that the amount of electrical power entering the grid exactly matches the amount being used. | Because alternating current can not be stored, the grid is managed so that the amount of electrical power entering the grid exactly matches the amount being used. | ||
It can be visualized as a pool in which the water level must be kept at a constant level <!-- an explanation of voltage etc should probably be added | It can be visualized as a pool in which the water level must be kept at a constant level while a varying number of people are siphoning water out at varying speeds with different-sized hoses. <!-- an explanation of voltage etc should probably be added to this somehow --> | ||
[[File:Daily load curve.png|thumb|Typical daily load curve]] | [[File:Daily load curve.png|thumb|Typical daily load curve]] |