A power control method for a faulty process of a flexible direct current power grid system

The invention relates to the field of flexible direct current transmission, in particular to a power control method for a faulty process of a flexible direct current power grid system. By collecting the active power reference value of each pole of the converter station, the measured value and the operation mode of each converter, the total redundancy capacity of the receiver converter is calculated, When a fault occurs in the receiving converter, the difference between the total redundant capacity of the receiving converter and the capacity of the faulty converter is judged. If the differenceis positive, only the control mode is switched. If the difference is negative, the total power of the sending converter station of the fault pole layer is reduced to the maximum transportable capacityof the other receiving converters of the fault pole layer. At that same time, the power of each perfect pole is distributed actively, the power balance of the direct current system is ensured, and the stable operation of the