US 12,255,549 B1
High current Voltage-Source Converter
Shreesha Adiga Manoor, Milpitas, CA (US); Govind Chavan, Union City, CA (US); Mahsa Ghapandar Kashani, Millbrae, CA (US); and Antonio Ginart, Santa Clarita, CA (US)
Assigned to Smart Wires Inc., Durham, NC (US)
Filed by Smart Wires Inc., Union City, CA (US)
Filed on Jun. 18, 2021, as Appl. No. 17/352,035.
Claims priority of provisional application 63/198,480, filed on Oct. 21, 2020.
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 7/5387 (2007.01); H02M 7/483 (2007.01)
CPC H02M 7/53871 (2013.01) [H02M 7/483 (2013.01)] 20 Claims
OG exemplary drawing
 
10. A voltage source converter, comprising:
a first inverter valve unit, comprising a first full H bridge of switching devices, the first full H bridge having a third terminal between third and fourth switching devices of the first full H bridge, a fourth terminal between first and second switching devices of the first full H bridge, and a first capacitor having first and second terminals;
a second inverter valve unit, comprising a second full H bridge of switching devices, the second full H bridge having a third terminal between third and fourth switching devices of the second full H bridge, a fourth terminal between first and second switching devices of the second full H bridge, and a second capacitor having first and second terminals;
the first inverter valve unit and the second inverter valve unit are connected in parallel between a first transmission line terminal and a second transmission line terminal, with the third terminal of the first full H bridge and the third terminal of the second full H bridge connected to the first transmission line terminal, with the fourth terminal of the first full H bridge coupled to the second transmission line terminal through a first inductor and the fourth terminal of the second full H bridge coupled to the second transmission line terminal through a second inductor, and operable to inject reactive power into a transmission line; and
a first paralleling conductor and a second paralleling conductor, connecting the first inverter valve unit and the second inverter valve unit in parallel, with the first terminal of the first capacitor connected to the first terminal of the second capacitor through the first paralleling conductor, and the second terminal of the first capacitor connected to the second terminal of the second capacitor through the second parallelling conductor, in a self-balancing circuit arrangement having terminals for coupling to the transmission line;
wherein the voltage source converter is series coupled to the transmission line through the first transmission line terminal and the second transmission line terminal.