HVDC SERIES CURRENT SOURCE CONVERTER

摘要

The present invention relates to a multilevel current source converter (CSC) 5 for controlling electrical power transmission in a high voltage direct current (HVDC) transmission system 1. The CSC comprises: an alternating current (AC) side 20 for input/output of AC to/from the CSC; a direct current (DC) side 21 for input/output of DC to/from the CSC; and a plurality of modular CSC cells 10 connected in parallel with each other between the AC side and the DC side of the CSC, each modular cell comprising a plurality of switches 15. The CSC is configured for being connected in series with an HVDC transmission line 3 and for injecting a voltage in series with the HVDC transmission line at the DC side of the CSC.