Abstract: With the construction of new power systems, a large number of distributed new energy sources are connected to the distribution network nearby, and a series of problems such as the voltage limit at the end of the distribution network, the excessive harmonic content, and the difficulty of protection cooperation.This paper introduces the problems faced in the construction of Baoding’s new power system and the application scenarios of the distribution network PMU system in Baoding power grid.Aiming at the present technology status of the inability to monitor the transient operation information of the active distribution network, a micro-monitoring system based on high-precision wide-area synchronous PMU is proposed.The operation condition of the distribution network is briefly analyzed through the system architecture, the working principle, and the collected microsecond wave recording, and the advantages of the system in the information collection of the active distribution network.