Abstract: With the rapid growth of wind power installed capacity in the northern Hebei region, large-scale wind power grid integration poses a serious challenge to the stability of the power system. The integration of a large amount of wind power affects the traditional power flow distribution of the grid. At the same time, factors such as intermittency and randomness of wind power can cause unstable wind power, which seriously affects the voltage quality of the grid. The impact of large-scale wind power integration on the system varies, with a more significant decrease in voltage levels in centralized integration areas compared to decentralized integration areas. At the same time, the voltage of adjacent nodes of the access points in the centralized access area will also have varying degrees of cascading effects. However, the voltage level of wind power at 100% output can meet the operational requirements of the power grid. For specific regions, after wind power is integrated into the grid, analysis of aspects such as grid power flow distribution, voltage stability, reactive power balance, and node voltage sensitivity demonstrates certain optimization and improvement effects on the safe and stable operation of the grid.