Abstract: With the advancement of China's dual-carbon strategy, a large number of distributed energy resources (DERs) have been integrated into medium- voltage and low-voltage distribution networks, resulting in prominent challenges such as high penetration and high volatility. These issues have led to insufficient power quality and limited supply capacity, which urgently require effective solutions.To address these challenges, State Grid Yishui Power Supply Company has developed a photovoltaic monitoring system to achieve the "four capabilities" of distributed PV operation and control at the county level. A hybrid energy storage system—combining centralized storage, PV-coupled local storage, and substation-level cloud storage—was constructed to improve the flexibility of PV integration. An integrated village-level intelligent microgrid featuring PV, energy storage, DC transmission, flexibility, and EV charging was also established, forming a multi-source complementary green energy supply network.Grid-connected switches for 10 kV distributed photovoltaic systems were upgraded to enhance safety and control. Technologies such as visual monitoring of medium-voltage lines, autonomous UAV inspections, and online diagnostics of distribution substations were deployed. These measures support the development of an intelligent inspection system, significantly improving the quality and efficiency of distribution network operations.