Weak connection line determination method and planning method of wind power high-permeability power grid system

The invention discloses a weak connection line determination method for a wind power high-permeability power grid system. The method comprises the following steps: acquiring system parameters of a target wind power high-permeability power grid system; enabling each wind power plant and the nearest synchronous unit in the system to be equivalent to an equivalent generator node, and constructing a system model after wind power integration; and screening and determining the weak connection lines of the target system to obtain a final weak connection line. The invention further discloses a planning method comprising the weak connection line determination method of the wind power high-permeability power grid system. According to the method, the wind power plant and the adjacent synchronous machine nodes are subjected to joint analysis, the influence of the output change of the wind power plant on the node admittance matrix is considered, the system weak connection line screening method considering the influence of