Abstract
High Voltage Direct Current (HVDC) transmission links are currently in operation throughout the world. Until a few years ago, what has limited the use of this way of transmitting power has generally been its cost, but with the advances in power electronics in reducing costs in thyristors: higher rated voltage and current, and simplification of the tripping and protection circuits, with more compact converter stations, with the use of GTO thyristors and with the cooling of the thyristors by liquid freon instead of water, a new panorama is beginning to be had to use this technique. The purpose of this article is to familiarize the reader with the fundamental concepts of High Voltage transmission in Direct Current, since this is an alternative for the transport of energy, it is analyzed and evaluated in many of the transmission expansion projects in the world.
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