A Study on the Multi-level Risk Management System of Power Grid Material Supply Chain Based on Dynamic Data - Zhang, Haitao; Zhao, Yantao; Wang, Yiruo; Wang, Fei; Zhao, Jinyong; Fan, Fuling; Xu, Ning; Cui, Lingxiao; Yao, Shengping; Han, Weiwei (2024 4th International Conference on Smart Grid and Energy Internet (SGEI), Smart Grid and Energy Internet (SGEI), 2024 4th International Conference on, 2024)