Wind power plant power optimization scheduling method and system

The invention discloses a wind power plant power optimization scheduling method and system, and the method comprises the steps: S1, obtaining the total active power output of a wind power plant, the total active power demand of a power grid, the active network loss of a wind turbine generator, and the wind energy active power upper limit, and building constraint conditions, taking active power distribution with minimum active network loss as a target function, and combining the constraint condition with the target function to construct a Lagrange function; s2, obtaining a power sensitivity coefficient of each wind turbine generator in the wind power plant; and S3, solving the Lagrange function based on the power sensitivity coefficient of each wind turbine generator in the wind power plant to obtain the active power increment, the network loss increment, the active power and the network loss of the wind power plant, and sending the active power increment, the network loss increment, the active power and the n