High Voltage Dc Power Supply

Written by Kevin Tavolaro
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While traditional direct current power supplies are best suited for use with small, portable devices, a high voltage DC power supply (HVDC) is capable of providing an enormous amount of bulk electricity. In the past, alternating current (AC) was the preferred means of bulk electrical transmission, as its multidirectional flow allowed for much more control than the unidirectional offered by DC.

A high voltage power supply can be implemented at the second stage of electricity's journey from the supplier to the customer. This is the stage of "electric power transmission." During this stage, energy that has been created by the supplier via hydroelectric, nuclear, thermodynamic, and other means, is harnessed by a capacitor. In this case, it is harnessed by a HVDC capacitor, which generates electricity as the energy interacts with the surface plates. This electrical power is then redirected to supply power to the various homes connected to the supplier.

High Voltage DC Power Supply vs. AC Power

Grids regulate the flow of electricity from the supplier to the customers. As electricity first enters the grid, it is changed, via electrical transformation, from a medium voltage to a high voltage. In order for the electrical flow to transverse the distance of the grid and make it to the customer's homes, it needs to undergo this transformation. Prior to HVDC devices, AC currents were the only kind capable of containing and transporting high voltage electrical flows across a great distance. However, with the development of HVDC, direct current can now be utilized. This is especially helpful in the few situations where alternating current power is incompatible.

Situations that clearly favor a high voltage DC power supply over an alternating current include undersea cables, connections between two unsynchronized AC power supplies, and increasing the capacity for existing grids. Undersea cables have a larger capacity than other cables, which means that if alternating current is used it would quickly be reduced. A high voltage DC power supply carries more energy per conductor than any other kind of power supply, which allows its constant rate to be more efficient than the highest rate of an AC power supply.


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