针对现有数字孪生在特高压直流系统中的应用，分析了数字孪生技术在解决特高压直流系统规模、数据、应用等方面存在的挑战与问题，并且在基础管理、设备管理、安全管理和业务运营等方面，系统地展示了数字孪生技术的应用场景与功能特点。根据业务需求构建了数字孪生场景以及数字孪生技术为关键节点的数字电网创新应用技术体系。以电网数字孪生转型为基础，从数据感知、模型构建、模型应用角度探索其应用场景，提高了系统在虚拟世界中的感知预测能力，同时支撑变电站智能化应用和新型电力系统的数字化服务需求，为电力行业的数字化转型提供了具体有效的路径与参考，提升了电网互动性、安全性，逐步实现电网业务的自动化、智能化、无人化。

Focuses on the application of digital twin technology in ultra-high voltage DC system, this paper analyzes the challenges and problems of digital twin technology in solving the scale, data, and application of ultra-high voltage DC systems, and systematically demonstrates the application scenarios and functional characteristics of digital twin technology in basic management, equipment management, safety management, and business operations. Based on business needs, a digital twin scenario and the innovative application technology system of digital power grid with digital twin technology as the key node are constructed. Based on the digital twin transformation of the power grid, its application scenarios are explored from the perspectives of data perception, model construction, and model application, improving the system′s perception and prediction capabilities in the virtual world. At the same time, it supports the intelligent application of the substations and the digital service demand of the new power system, provides specific and effective paths and references for the digital transformation of the power industry, and enhances the interactivity and security of the power grid, gradually achieves automation, intelligence, and unmanned operation of power grid business.