Transient Voltage Stability Assessment Of High Proportion Wind Power Transmission End Power Grid

A method to evaluate the transient voltage stability of high proportion wind power transmission network is proposed. Starting from the transient overvoltage calculation formula, the calculation formula of the limit short-circuit ratio is derived, and then the limit short-circuit ratio is obtained by taking the transient overvoltage amplitude as the known quantity. Considering the influence of wind farm grid connection on the short-circuit ratio, the calculation formula of the system short-circuit ratio after wind power grid connection is further derived, and then the limit short-circuit ratio is taken as the known quantity, The ultimate wind power permeability corresponding to the ultimate short-circuit ratio is calculated by substituting the formula, which is used as an index to evaluate the transient voltage stability of high proportion wind power transmission terminal system.