Fuzzy Assessment of Hierarchical State of Relay Protection Equipment in Intelligent Substation based on Entropy Weight DSmT

For the state evaluation of relay protection equipment in intelligent substations, the uncertainty of state information indicators can lead to the evaluation results not accurately reflecting the operating status of the equipment. This article proposes a hierarchical state evaluation model for intelligent substation relay protection equipment based on fuzzy evaluation theory and entropy weight DSmT. This article proposes a hierarchical state evaluation model for intelligent substation relay protection equipment based on fuzzy evaluation theory and entropy weight DSmT. The model is divided into historical The model is divided into historical state level evaluation and real-time state level evaluation. The fuzzy evaluation theory is applied to construct the membership function model of grade evaluation, and the index parameters reflecting the state level evaluation of intelligent substation relay protection equipment. The fuzzy evaluation theory is applied to construct the membership function model of grade evaluation, and the index parameters reflecting the operation status of relay protection equipment are selected as the input of the model. This model effectively solves the problem of excessively high level evaluation. effectively solves the problem of excessively absolute state level intervals and overcomes the limitation of DST's inability to fuse highly conflicting evidence. Through example verification, the results show that the model can effectively evaluate the status of relay protection equipment in intelligent substations, providing certain guiding principles. Through example verification, the results show that the model can effectively evaluate the status of relay protection equipment in intelligent substations, providing certain guiding significance for further maintenance decisions.