Abstract: To address the voltage limit violation issues caused by the integration of distributed photovoltaic (PV) systems, this paper presents the development of a fully automatic intelligent voltage regulation device. The device adopts a technical approach that combines industrial-grade control units with intelligent algorithms, featuring functions such as precise voltage monitoring, trend prediction, and automatic regulation. Practical applications have demonstrated that the device can effectively suppress voltage rise at the end of PV feeders, stabilize the output voltage within a reasonable range, significantly improve the voltage compliance rate in the power supply area, and hold significant value for ensuring the safe and stable operation of the power grid.