Multi-terminal DC electrical network

A multi-terminal DC electrical network (20) comprises: a plurality of DC terminals (22), each DC terminal (22) being operatively connected to at least one other DC terminal (22) via a respective DC power transmission medium (24); a plurality of converters (26), each converter (26) being operatively connected to a respective one of the DC terminals (22), the plurality of converters (26) including at least one designated converter (26); and a controller (28) including a solver (30) configured to use an algorithm to process a plurality of values to thereby compute a no-load DC voltage for at least one first designated converter (26) as a function of the plurality of values, the plurality of values including: at least one first value defining an operating mode of the or each designated converter (26); at least one second value defining a default electrical characteristic of the multi-terminal DC electrical network (20) or a computation parameter of the algorithm; and at least one third value defining an electrical measurement corresponding to a voltage or current in the multi-terminal DC electrical network (20), wherein the controller (28) is configured to operate the or each first designated converter (26) in accordance with the or the respective computed no-load DC voltage.