DC VOLTAGE COMPENSATION IN A MULTI-TERMINAL HVDC POWER TRANSMISSION NETWORK

摘要

In a multi-terminal HVDC power transmission network (10) comprising at leastthree HVDC converter stations (1to 6) interconnected by at least two transmission lines (12, 14, 16, 18, 20),where at least one of the transmission lines is a longline, an active voltage source device (30) is series connected to one of thetransmission lines (20), which maintains the DC voltageof the transmission lines of the network to be within a predefined voltagerange by injecting an additional DC voltage in serieswith the one transmission line (20).