Method of automated synthesis of the logic part of relay protection device which increases its sensitivity

Abstract

Often there are such modes of operation in the electric power systems where standard methods of relay protection and automation become insufficiently effective. For example, such modes are typical for electric networks with distributed generation and renewable energy sources. Today, the task of developing new digital relay protection methods, that have high technical excellence and fully comply with the requirements of IEC 61850, is relevant. A method of organizing the logical part of multiparameter relay protection is proposed, which improves its sensitivity. The method is based on the criterion of minimizing the average risk of decision making and solving the task of abstract synthesis of automata theory. The application of the proposed method is considered on the example of multidimensional relay protection with five measuring fault detectors and the implementation of simulation models in the Matlab/Similink software package.