Static voltage stability assessment method of three-phase unbalanced power distribution network including wind power

The invention discloses a static voltage stability assessment method of a three-phase unbalanced power distribution network including wind power. The static voltage stability assessment method of the three-phase unbalanced power distribution network including the wind power comprises the steps of: obtaining parameters of a power distribution network system and wind power parameters accessed to the power distribution network; setting the initial value of the load increase factor LSF of the power distribution network system including the wind power as 1, obtaining a tide of the power distribution network system including the wind power at the presence of the current LSF based on the parameters of the power distribution network system and the wind power parameters , judging whether the tide is converged, if so, obtaining a voltage amplitude value and a phase angle of each node of the power distribution network and a transmission power of the terminal end of each branch, otherwise, indicating that the power distribution network loses the static voltage stability; obtaining the static voltage stability index of each branch based on the tide calculation result of the power distribution network including the wind power; obtaining a static voltage stability index and a stability margin of the whole network based on the static voltage stability index of each branch, assessing the static voltage stability of the power distribution network including the wind power at the presence of the current LSF based on the sizes of the static voltage stability index and the stability margin, and determining the weakest branch and weakest node of the system.