Power Transmission - Electrical Power

Electrical Power

With the widespread establishment of power grids, power transmission is usually associated most with electric power transmission. Alternating current is normally preferred as its voltage may be easily stepped up by a transformer in order to minimize resistive loss in the conductors used to transmit power over great distances; another set of transformers is required to step it back down to safer or more usable voltage levels at destination.


Power transmission is usually performed with overhead lines as this is the most economical way to do so. Underground transmission by high voltage cables is chosen in crowded urban areas and in high-voltage direct-current (HVDC) submarine connections.

Read more about this topic:  Power Transmission

Famous quotes containing the words electrical and/or power:

    Few speeches which have produced an electrical effect on an audience can bear the colourless photography of a printed record.
    Archibald Philip Primrose, 5th Earl Rosebery (1847–1929)

    Compared to other parents, remarried parents seem more desirous of their child’s approval, more alert to the child’s emotional state, and more sensitive in their parent-child relations. Perhaps this is the result of heightened empathy for the child’s suffering, perhaps it is a guilt reaction; in either case, it gives the child a potent weapon—the power to disrupt the new household and come between parent and the new spouse.
    Letty Cottin Pogrebin (20th century)