As power systems with power electronics are developed, the grid structure of power grids is becoming increasingly complex, as is the research on reactive voltage dips in power grid power supply processes. Based on the above background, the paper proposes a reactive voltage zoning control technology based on regional boundary decoupling by using reasonable voltage monitoring means and reactive voltage zoning control technology to monitor and adjust the voltage of the power grid accordingly, to meet the demand for power quality within the power system. A new algorithm is used to propose a reactive voltage zoning control model for power grids, thereby improving the problem in this area.