Patent ID: 8264102
Filing Date: 2012-09-11
Classification: H02G,H02J,Y02E

Abstract:
1. An apparatus for flexible power transmission and for deicing, by using direct current, of a high-voltage line having a plurality of phases, the apparatus comprising: an AC voltage connection for connection to the high-voltage line; said AC voltage connection having a number of phases corresponding to the phases of the high-voltage line; each of said phases having at least one inductance and a valve circuit connected in series with said inductance; a junction point connected between said valve circuit and said AC voltage connection; a first current path having a first power semiconductor valve and a second current path having a second power semiconductor valve, said power semiconductor valves being connected in mutually opposite senses with reference to said junction point; a TCR star point; at least one star point switch for connecting said first and second current paths to said TCR star point; a zero phase-sequence system suppression device having a star point; and a connecting line connected between said TCR star point and said star point of said zero phase-sequence system suppression device; wherein said connecting line is a ground connection; wherein said zero phase-sequence system suppression device is a transformer having a primary winding connected in a delta and a secondary winding connected in a grounded star.