Indexes and Methods of Multi-dimensional Comprehensive Evaluation of Relay Protection

The multi-dimensional comprehensive evaluation of relay protection is the refinement of the comprehensive evaluation in the evaluation dimension, which can further analyze the combined characteristics of the operation status of relay protection in multiple dimensions. The multi-dimensional comprehensive evaluation of relay protection is easy to fall into the scene of small sample evaluation, thus affecting the accuracy of the comprehensive evaluation. In order to solve the small sample problem of multi-dimensional comprehensive evaluation of relay protection, this paper proposes the concept of comprehensive index of comprehensive evaluation, which reflects the influence characteristics of each single dimension of comprehensive evaluation of relay protection on the results of multi-dimensional comprehensive evaluation. The multi-dimensional comprehensive evaluation method of relay protection based on single-dimensional evaluation results is put forward accordingly, which can refine the operation state of relay protection under the combined classification, thus completing the refinement and practicality of relay protection operation evaluation. The effectiveness of the method in this paper is verified by an example.