Fault identification method and device of high-voltage direct-current voltage divider

The invention relates to a fault identification method and device of a high-voltage direct-current voltage divider. The method comprises steps of acquiring alternating-current side active power and direct-current side active power of a rectification station/inversion station in a converter station, direct current of the rectification station and the inversion station and single-electrode actual power of the converter station; judging whether the following determination condition is met: the difference value between the alternating-current side active power and direct-current side active powerof the rectification station/inversion station, the difference vale between the direct current of the rectification station and the direct current of the inversion station and the size of the single-electrode actual power of the converter station meet a preset condition; and if the determination condition is met, determining that a direct current voltage divider of the rectification station/inversion station in the conver