Status and Prospect of Bad Data Identification in Smart Substation

Smart substation is an important part of smart grid and the source of measurements. Local bad data identification inside smart substation is an effective solution to improve the accuracy of the basic data of power grid. The computing architecture and basic concepts of substation bad data identification are explained. The research status of substation bad data identification methods is summarized, including rule-based sequential identification, artificial intelligence based data identification and substation generalized state estimation. Finally, the future research of substation bad data identification is prospected.