Abstract: With the rapid development of new energy and the large-scale integration of distributed power sources, the centralized control method of traditional power systems is facing severe challenges. This article aims to study a distributed coordinated control strategy for power systems based on adaptive dynamic programming(ADP). Through an application example of an intelligent power dispatch project in Guizhou, the effectiveness of this strategy in voltage, frequency, and power coordinated control is explored. The implementation results showed that the voltage fluctuation range was reduced by 65%, the frequency deviation was controlled within ±0.03 Hz, the power balance capability was significantly improved, and the overall operating efficiency was increased by 10%. Research has shown that ADP based distributed coordinated control strategies can effectively meet the stability requirements of complex power systems and provide important guarantees for the efficient utilization of new energy.