Direct and alternating currentHVDC multi-terminal operation
Multi-terminal operation is characterised by the use of at least three converters for HVDC interconnections. This mode of operation therefore forms a precursor to DC grids. Construction using either LCC or VSC technology is generally possible. It only makes sense to install a line-commutated (LCC) variant, however, if one power flow direction is specified throughout the system. If changes in the power flow are planned, a voltage-source (VSC) design is easier to implement.