The power transmission plant which includes the VSC converter and the DC/DC converter

摘要

(57) Abstract It is the power transmission plant which includes one VSC converter (1) at least. At least, one DC/DC converter (33,34) is included, these have with two electric current valves which are jointed in series and the inductance which is jointed to the point at those time. The DC/DC converter is jointed 1st by the electrode of direct current voltage side of the converter via inductance, is jointed with by one electric current valve and 2nd the electrode 1st via the output terminal, unbalanced boost transformation of direct current voltage profit, in the 2nd output terminal (27) of the DC/DC converter which is jointed to the 2nd electric current valve obtains the voltage which possesses the value whose 1st is higher than on the output terminal (28) in two inter-electrodes.