Abstract: With the continuous increase in the penetration rate of residential photovoltaic (PV), voltage regulation in low-voltage (LV) distribution networks has attracted growing attention. To address the voltage regulation requirements across different time scales, a coordinated control method for LV distribution networks with high-penetration residential PV is proposed. First, aiming at minimizing network losses and voltage deviation, a day-ahead and intra-day centralized optimization control model is established to determine the operational setpoints for voltage regulation resources. Then, the optimized results for residential PV systems are applied in the real-time control stage, and an adaptive control strategy for residential PV is improved to dynamically adjust the output power based on node voltage measurements. Finally, simulation analysis on a 21-node LV distribution network demonstrates that the proposed method significantly improves network losses and voltage profiles, effectively suppresses voltage violations, and ensures the secure and stable operation of the distribution network.