With the booming development of Internet, cloud computing and big data, the demand for processing massive data has greatly increased. As a key technology of knowledge engineering in artificial intelligence, knowledge graph can effectively manage massive information and realize intelligent knowledge extraction, reasoning, storage and retrieval. Its characteristics and application scenarios fit well with power grid systems. This paper introduces the development history of knowledge graph technology and analyzes the construction process of knowledge graph in detail. A review of its existing applications in the power grid from different perspective is presented. And the future challenges of knowledge graph construction have been put forward in the paper.

Knowledge Graph;Artificial Intelligence;Graph Database;Power Grid Applications