Line fault restarting method and device for parallel multi-terminal direct current power transmission system

The invention relates to a line fault restarting method and device for a parallel multi-terminal direct current power transmission system, and the method carries out processing of working conditions that a fault line is connected with a unique station and is not connected with the unique station in a multi-terminal direct current power transmission system, for a working condition that the unique line is connected with the unique station, after one fault-free station in other converter stations is converted into a unique station operation mode, system restarting can be carried out again, so that the system downtime is effectively shortened, and the reliability of system fault processing is greatly improved; and for the working condition that the unique line is not connected with the unique station, the fault converter station and the line are directly quitted on line, so that the system restarting time can be greatly shortened, and the transmission efficiency of the system is effectively improved. 本发明涉及一种并联型多端