Abstract: The big language model technology is a key technology for promoting the digital transformation of standards. It is of great significance to explore the core technologies, technical characteristics, and application prospects of ChatGPT class big language models to empower the digital transformation of standards in electric power field. This paper introduces the concepts of ChatGPT and the digital transformation of power standards, and proposes the core technologies and technical characteristics on the digital transformation of standards in electric power field. For the digitalization of power standards themselves, the universal ChatGPT public big language model can promote the diversified presentation of power standard forms. For the digitalization of power standardization process, the professionally-used ChatGPT power big language model can promote the deep application of power standard knowledge. At the same time, it is pointed out that the development of ChatGPT has a transformative impact on the digital transformation of standards in electric power field, including changing the way of which power standard data are annotated, the way of which power standards data are mined, the power standards literature resources retrieval mode, the mode of power standards information acquisition and sorting, and the mode of human machine interaction. Finally, the application prospects of ChatGPT-based big language models for the digital transformation of power standards are proposed from four aspects: application mode, application framework, specific application cases, and future application directions. The challenges and limitations faced in terms of technical limitations, implementation complexity, standardization construction specificity, and economic cost-effectiveness are also presented.