Plant for transmitting electric power utilizing asymmetric operation of voltage source converters

摘要

A plant for transmitting electric power through HVDC includes two converter stations interconnected by a bipolar direct voltage network and each connected to an alternating voltage network. Each converter station has a Voltage Source Converter with switching cells each including at least one energy storing capacitor. The Voltage Source Converters are configured to utilize a direct voltage having a higher magnitude for a first of the poles than for a second thereof with respect to ground.