Nagay Vladimir I., Ukraincev Alexander V., Sarry Sergei V., Chminalov Gennady N. Appraisal Possibility of the Developing Faults Recognition

South-Russian State Technical University (Novocherkassk Polytechnic Institute)
RussiaThe paper deals with appraisal possibility of the developing faults recognition and proposals for the implementation of relay protection. Recognition of developing faults is possible by expanding the knowledge base of relay protection, the use of the multidimensional space of information features (phase currents and voltages, currents and voltages of symmetric, orthogonal components and their rate of change, flux, etc.), the union of separate measuring and protection into the system. Presented options for constructing high-speed and backup protection with advanced features for electrical networks 6-220 kV: protection from internal and external ground faults in networks 6-35 kV, high-performance protection against internal arc fault and short circuits in complete switchgear, backup protection transformers and lines.