Abstract: 【】Aiming at the problem that the non-standard description of virtual terminals of multi-manufacturer equipment in intelligent substation leads to frequent misjudgment and misjudgment of manual verification of SCD virtual circuit of busbar protection, an intelligent verification method of virtual circuit combined with accurate matching of branch number and weighted cosine semantic similarity is proposed. A three-layer standardized resource library is constructed to realize the automatic mapping of virtual terminals from multiple manufacturers. A double adaptive discrimination mechanism is designed to verify the semantic functions of structured branch topology and non-standard terminals respectively, and a three-level hidden danger grading standard is matched to realize defect positioning and grading output. Engineering tests show that this method can effectively identify typical circuit configuration defects such as bus tripping, failure, and voltage blocking, and significantly reduce the difficulty of SCD verification in non-standard projects.