English: Cities are the political, economic, and cultural centers of regions and even countries. Infrastructure such as electricity, water supply, gas supply, and transportation forms the foundation of normal urban operation. Among them, electricity is the foundation of other infrastructures, and its security is particularly critical. At present, urban power grid security faces two major external threats: extreme weather events and deliberate attacks. Therefore, constructing a coupled model of urban infrastructure systems, evaluating vulnerable components, and implementing targeted reinforcement measures are important approaches to ensure urban social security.

中文: 城市是一个区域乃至国家政治、经济、文化的中心。电力、供水、供气、交通等基础设施是支撑城市正常运行的基础，其中电力是其他基础设施的基础，其安全性尤为重要。目前城市电网安全面临两类严重外部威胁：一是极端天气，二是蓄意攻击。因此，构建城市基础设施系统耦合模型，评估系统中的脆弱性环节并采取针对性加固措施，是保障城市社会安全的重要举措。