Abstract: Currently, the grid strength is insufficient in large-scale new energy integration and delivery regions. Problems such as regional grid voltage fluctuation, unreasonable reactive power flow among stations, and insufficient voltage regulation accuracy are particularly prominent, which have become the key bottlenecks restricting new energy accommodation. Aiming at the above problems, this paper analyzes the deficiencies of the existing Automatic Voltage Control (AVC) system in new energy integration zones. Combined with the electrical coupling characteristics of various new energy stations in the integration region, an integrated control architecture for integration stations is constructed, and a coordinated reactive power control strategy for station groups and an adaptive algorithm for reactive power-voltage sensitivity are proposed. Finally, a multi-level collaborative AVC system suitable for new energy integration zones is developed and verified with an actual domestic engineering application case. The results show that the proposed strategy can effectively eliminate the reactive power circulation among new energy station groups and significantly improve the qualified rate of voltage regulation.