NOVELTY - The method involves: collecting unit equipment information at wind power plant, comprising operation condition and technologic characteristic parameters of equipment relative to fan, power generation, transformer substation and meteorological station; summarizing overall-plant unit equipment information and field power predication information so as to tally power generation ability; and comprehensively analyzing field wind power predication, overhaul plan and power generation ability statistic information of the wind power plant to generate power generation ability plan.    USE - Grid-connection coordination control method of wind power plant.    ADVANTAGE - Provides method which completely fulfills functions and mutual coordination relation of each grade and each link according to three-grade combined and coordinated frame of fan, wind field and power grid so as to enable wind power plant to integrally display operation and regulation property of traditional power plant relatively to power grid and reduce impact and influence on power grid, and even supply necessary support for frequency and voltage modulation of power grid. Eliminates or reduces defect and bad influences of each individual fan by taking advantage of combined coordination and mutual support of transverse and longitudinal whole parts via support of modern communication and analysis computing technology, so as to enable whole wind power plant to display friendly property to power grid, improve grid-connection operation hours and largely boost economic benefits.    DETAILED DESCRIPTION - The method further involves: reporting the power generation ability plan and dispatch wind power predication information to the power grid dispatch Transmission System Operator (TSO); the power grid dispatch TSO choosing corresponding active and passive coordination control manner according to reported overall power generation ability plan and requirement of operation and control of overall grid; according to measured values of collected grid-connection points or public connection point, judging whether the power grid is in normal stable condition or incident condition; if the power grid is in stable operation condition, then shielding low-voltage ride-through function, and converting selected active and passive control strategies into specific object values of active power generation and passive power generation of the wind power plant at specific time; sending the object values to Automatic Gain Control/Automatic Voltage Control (AGC/AVC) execution devices, then the power storage control and output dispatch modules comparing the object values with the real power generation values measured at the wind power plant, and converting the object values into concrete object values for each set of power storage device and passive compensation device according to coordination dispatch principle, then sending the concrete object values to each equipment to execute; if the power grid is in incident condition, then shielding active and passive coordination control, starting low-voltage ride-through function, and maintaining set grid-connection.    DESCRIPTION OF DRAWING(S) - The drawing is a block diagram of a grid-connection coordination control system of a wind power plant. (Drawing includes non-English language text).