Extra-high voltage multi-terminal direct current transmission line ice-melting electrical wiring and control method thereof

The invention relates to the technical field of high-voltage direct-current power transmission, in particular to an extra-high-voltage multi-terminal direct-current power transmission line ice-melting electrical wiring and a control method thereof.The extra-high-voltage multi-terminal direct-current power transmission line ice-melting electrical wiring comprises first to seventh ice-melting isolation switches and a plurality of convertor stations, and the convertor stations comprise the first convertor station, the second convertor station and the third convertor station which are connected through a direct-current line; the third converter station comprises an anode power transmission line system, a cathode power transmission line system, a grounding electrode, an anode DC line, a cathode DC line and first to twenty-second isolation switches. According to the converter station, the switching function of the operation states of the converter station and the ice melting function of parallel operation of double