Abstract: To address the issues of low efficiency and error-proneness in manual configuration of SSD files for smart substations, this paper proposes an automatic SSD file generation technology. This approach enables rapid primary system modeling through basic structure and bay templates, automatically establishes mapping relationships between primary and secondary equipment based on standardized naming rules, and achieves intelligent equipment information matching using an association rule library. Engineering applications demonstrate that this technology can reduce SSD file configuration time from 4 hours to 15 minutes with a correctness rate exceeding 98%, significantly improving project implementation efficiency and quality, thereby providing effective technical support for smart substation construction.