Bottom-guaranteed power grid optimization method for key area power grid under violent typhoon condition

The invention provides a bottom-guaranteed power grid optimization method for a key area power grid under a strong typhoon condition. The method comprises the steps of S1, selecting tie lines for interconnection of a bottom-guaranteed power grid with an external power grid; S2, taking the power control level of the tie lines as a basis to formulate generator active power regulation and load control measures in the bottom-guaranteed power grid area; S3, carrying out power flow zero-cutting control on a contact section of the bottom-guaranteed power grid and the external power grid; S4, controlling the voltage level of a bus node in the bottom-guaranteed power grid; S5, carrying out transient stability characteristic verification in bottom-guaranteed power grid division process through PSD-BPA equipment; and S6, performing middle transient stability characteristic verification after splitting of the bottom-guaranteed power grid and the external power grid through the PSD-BPA equipment. According to the method,