H - Electricity – 02 – J
Patent
H - Electricity
02
J
H02J 3/36 (2006.01)
Patent
CA 2664076
An electric power transmission system comprises at each end of a High Voltage Direct Current (HVDC) transmission line (1 ) comprising three conductors (2-4), a converter station (5, 6) for conversion of an alternating voltage into a direct voltage for transmitting direct current between said stations in all three conductors. Each station has a VSC-converter (7, 8) and an extra phase leg (22, 22') connected between the two pole conductors (2, 4) of the direct voltage side of the converter. A third (3) of said conductors is connected to a midpoint between current valves of said extra phase leg. An arrangement (29) is adapted to control the current valves of the extra phase leg to switch for connecting said third conductor either to the first pole conductor or the second pole conductor for utilizing the third conductor for conducting current between said stations.
La présente invention concerne un système de transport d'électricité qui comprend, à chaque bout d'une ligne de transport CCHT (courant continu à haute tension) (1), trois conducteurs (2-4) et une station de conversion (5, 6) qui convertit une tension alternative en tension continue pour transporter un courant continu entre les stations dans les trois conducteurs. Chaque station comporte un convertisseur VSC (7, 8) et une branche de phase supplémentaire (22, 22') reliée entre les deux conducteurs de pôle (2, 4) du côté tension continue du convertisseur. Un troisième conducteur (3) est relié à un point médian entre des valves de courant de la branche de phase supplémentaire. Un dispositif (29) est conçu pour commander la commutation des valves de courant de la branche de phase supplémentaire afin de relier le troisième conducteur au premier conducteur de pôle ou au second, le troisième conducteur servant alors à transporter un courant entre les stations.
Abb Technology Ltd.
Robic
LandOfFree
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