POWER ELECTRONIC CONVERTER

摘要

A power electronic converter (10) for high/medium voltage direct current power transmission and reactive power compensation comprises a primary converter unit (12) and an auxiliary converter unit (14), the primary converter unit (12) including at least one primary converter limb (16) including first and second DC terminals (18, 20) for connection in use to a DC network (24) and an AC terminal (22), the or each primary converter limb (16) defining first and second limb portions (28,30), each limb portion (28,30) including at least one primary module (32), the or each primary module (32) including at least one primary switching element connected to an energy storage device (36), the auxiliary converter unit (14) including at least one auxiliary converter limb (44) including at least one auxiliary module (50) including a plurality of auxiliary switching elements connected to the energy storage device (36) of a corresponding primary module (32) in the first limb portion (28) of a respective primary converter limb (16), the primary switching elements of the primary modules (32) being controllable in use to switch the respective energy storage device (36) in and out of circuit to generate a voltage waveform at the respective AC terminal (22).