The control method allows the control of an installation (1) for transmitting electricity comprising a DC transmission network (3) including a group (2) of electricity transmission lines (4) that are linked to one another. The method allows the opening (E1) of at least one N-1 safety system (7) such that, for each safety system (7) being opened, the contribution to the flow of current through the group (2) of transmission lines (4), originating from the converter station (6) associated with said safety system (7) that is opened, is removed. Furthermore, the method also allows a search (E2) for the short-circuit fault in order to identify the faulty transmission line (4), and an operation (E3), implemented after identification of the faulty transmission line (4) by the search step (E2), of isolating the faulty transmission line (4) by opening the line circuit breakers (5a, 5b) of said faulty transmission line (4).
