Estado da arte da transmissão em alta tensão em corrente contínua.

Abstract

After being disregarded for a long time during the "war of currents", the transmission using direct current is gaining ground, placing itself as the best or even the only transmission technology to enable numerous projects involving large amounts of energy transferred over long distances. This big change is mainly due to the continuous improvements on conversion technologies made in last decades. This study contains a state of the art of power transmission using high voltage and direct current. It will discuss different types of equipment used in HVDC schemes and their peculiarities regarding similar equipment used in alternating current. Focus will be placed on understanding the challenges found in the development of the equipment used in DC and how gradually these barriers have fallen due massive investments on research. A comparison between HVDC and HVAC will also be presented in order to highlight the features of HVDC transmission. Not only a prospectus, this investigation aims to show the importance of this technology for several projects that will take for the next level the efficiency in energy transmission and the share of renewable energies in power generation.