High-voltage direct current (HVDC) is used to transmit large amounts of power over long distances or for interconnections between asynchronous grids. When electrical energy is transmitted over very long distances, the power lost in AC transmission becomes appreciable and it is less expensive to use direct current instead. For a long transmission line, these lower losses (and reduced construction cost of a DC line) can offset the cost of the required converter stations at each end.
high-voltage direct current (hvdc) is used to transmit large amounts of power over long distances or for interconnections between asynchronous grids when electrical energy is transmitted over very long distances the power lost in ac transmission becomes appreciable and it is less expensive to use direct current instead for a long transmission line these lower losses (and reduced construction cost of a dc line) can offset the cost of the required converter stations at each end