Alternating current channel transmission capacity optimization method and device in alternating current/direct current hybrid power system

The invention provides an alternating current channel transmission capacity optimization method and device in an alternating current/direct current hybrid power system. The method comprises the stepsthat double-machine equivalence is carried out on a transmission-side alternating current system according to the dynamic response curve of an alternating current/direct current hybrid power grid, soas to acquire a leading generator group and a hysteresis generator group; Thevenin equivalence is carried out on the alternating current/direct current hybrid power grid from the direct current side according to the leading generator group and the hysteresis generator group; and finally the operation mode of the alternating current/direct current hybrid power grid is adjusted according to the Thevenin equivalence result of the alternating current/direct current hybrid power grid; and the alternating current channel transmission capacity is optimized in the direct current hybrid power grid. According to the invention, t