With the rapid progress of AI technology, AI big models with transformer architecture as the core has made great progress in natural language processing, computer vision and other fields. Smart grid is a modern power system integrated with advanced information, communication and control technology. The complexity and variability of the system and the massive reference data provide application scenarios for the application of AI large model. This paper systematically expounds the key technologies matching with AI large model and its adaptability to the core links of smart grid, and focuses on the role of AI large model in smart grid construction, such as new energy grid connection, equipment management, grid topology optimization and dispatching decision, such as specific application modes and cases in load forecasting, real-time dispatching and multi-energy complementarity. At the same time, this paper deeply analyzes the key challenges in data, technology, engineering and security faced by the application of AI large model in various fields of power, and puts forward the corresponding optimal solutions. Finally, combined with typical cases, the future development direction of the integration of digital twins, generative AI and other technologies is conceived, which provides a theoretical reference and practical path for promoting the autonomous and efficient development of smart grid.
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