Converter station fault processing method and equipment

The invention relates to the technical field of flexible direct current power transmission, and discloses a converter station fault processing method and equipment, and the method comprises the steps: determining that a sub-module capacitor voltage in a home terminal flexible direct current converter has an overvoltage high risk when determining that the home terminal flexible direct current converter has a fault through valve control, and determining a fault type corresponding to the fault; and valve control executes valve group locking in the current-side converter station and the opposite-side converter station according to the fault type so as to reduce the overvoltage high risk of the capacitor voltage of the sub-module. According to the invention, the capacitor voltage of the sub-module in the flexible direct current converter at the home terminal can be effectively prevented from reaching the sub-module overvoltage protection constant value, so that overvoltage protection triggering is avoided, overvol