Recently, the State Grid Ningbo Hangwan Power Supply Company successfully completed the deployment of a DTU (Distribution Terminal Unit) at the intersection of the Xingci 3rd Road and the Binhai 7th Road in the Qianwan New Area, marking the achievement of full automation coverage across all 199 distribution lines in the area. This milestone signifies a critical step forward for the Hangwan Power Supply Company in constructing a fully self-healing smart grid.
With full DTU coverage for feeder automation, the system can instantly activate substation-level self-healing protection during faults. Faulty sections are isolated within seconds, while unaffected sections resume power supply rapidly, ensuring customers regain electricity within one minute, significantly improving service reliability.
Since the beginning of this year, the Hangwan Power Supply Company has actively advanced smart grid initiatives, coordinating comprehensive grid intelligence upgrades. The company meticulously assessed feeder renovation needs, analyzed technical challenges line by line, and expanded DTU and "three-remote" smart switch coverage through urban grid projects, capacity expansion support, and digital substation upgrades. This laid a solid foundation for achieving full feeder automation (FA) coverage. In May, the company will achieve 100% FA operation, completing a fully self-healing smart grid capable of autonomous fault diagnosis, isolation, and rapid power restoration. The advanced FA system automates the entire process of “fault localization, isolation, and recovery within seconds” without manual intervention, minimizing outages and enhancing grid reliability and safety. "Building on full line automation, we aim to create an 'omnidirectional self-healing' smart distribution network," said a company representative. "We will enhance device coordination, terminal maintenance, and real-time monitoring to improve FA stability and intelligence, advancing Qianwan's grid toward greater digitalization and automation to achieve full FA coverage at the earliest."
