Abstract: The AGC plays a critical role in integrating large-scale centralized photovoltaic PV power stations into medium-high voltage distribution networks. By dynamically adjusting the active power output of PV stations in response to grid load demands, AGC enhances PV utilization efficiency. The AGC system collects telemetry and remote signaling data from primary and secondary equipment within the PV plant, transmits this data to the dispatch master station via remote terminal units, and executes dispatch-derived active power control commands. Following predefined strategies, it allocates load setpoints to individual inverters, effectively mitigating the impact of PV output fluctuations on grid stability.Consequently, conducting AGC system grid-connection performance tests before PV station integration is essential to eliminate potential safety hazards. This paper details the verification objectives, implementation procedures, performance evaluation metrics, and risk assessment methodologies for AGC systems, using a 60.16 MW PV power station as a case study. The study provides valuable reference for grid-compliance performance testing of PV power stations.