A method for controlling an installation for transmitting electricity comprising a direct current transmission network comprising a group of electricity transmission lines linked to one another, each transmission line comprising a pair of two line circuit breakers (5a, 5b) arranged at the opposite ends of said transmission line, said installation comprising a number N of stations for converting alternating current to direct current each associated with a safety system, each converter station being linked to the group of transmission lines and being associated with a maximum contribution of short-circuit current, characterized in that each safety system is capable of interrupting a direct current corresponding to the maximum contribution of short-circuit current of the associated converter station, the line circuit breakers (5a, 5b) each having a breaking capacity capable of interrupting a direct current corresponding to the highest of the maximum contributions of short-circuit current of the converter stations, and in that the method comprises, following an occurrence of a short-circuit fault on one of the transmission lines, the following steps: • a step of opening at least N-1 safety systems such that, for each safety system that is opened, the contribution to the flow of current through the group of transmission lines originating from the converter station associated with said safety system that is opened is removed; • a step of finding the short-circuit fault to identify the faulty transmission line; • a step, implemented after identification of the faulty transmission line by the finding step, of isolating the faulty transmission line by opening the line circuit breakers (5a, 5b) of said faulty transmission line. characterized in that each safety system is capable of interrupting a direct current corresponding to the maximum contribution of short-circuit current of the associated converter station, the line circuit breakers (5a, 5b) each having a breaking capacity capable of interrupting a direct current corresponding to the highest of the maximum contributions of short-circuit current of the converter stations, and in that the method comprises, following an occurrence of a short-circuit fault on one of the transmission lines, the following steps: • a step of opening at least N-1 safety systems such that, for each safety system that is opened, the contribution to the flow of current through the group of transmission lines originating from the converter station associated with said safety system that is opened is removed; • a step of finding the short-circuit fault to identify the faulty transmission line; • a step, implemented after identification of the faulty transmission line by the finding step, of isolating the faulty transmission line by opening the line circuit breakers (5a, 5b) of said faulty transmission line. • a step of opening at least N-1 safety systems such that, for each safety system that is opened, the contribution to the flow of current through the group of transmission lines originating from the converter station associated with said safety system that is opened is removed; • a step of finding the short-circuit fault to identify the faulty transmission line; • a step, implemented after identification of the faulty transmission line by the finding step, of isolating the faulty transmission line by opening the line circuit breakers (5a, 5b) of said faulty transmission line.