Vasylets S. Analysis of transients and methods for protecting electrotechnical complexes of mine electrical networks.

Object - transients in electrotechnical complexes of mine electrical network. The purpose - improving the efficiency of electrotechnical complexes of mine electrical network based on transient analysis and improvement of methods for protection against emergency. Methods - matrix-topological method for describing the structure of power network, methods of the theory of transients in electric circuits, methods of the theory of alternating current electrical machines, superposition method, the method of Gear-Nordsieck for numerical solution of matrix differential equations, a method of space vector, methods of mathematical analysis. Novelty consists in development of mathematical model of electrotechnical complexes of mine electrical network of arbitrary topology as a system of nonlinear matrix differential equations, which differs from known in the possibility of transient analysis in regular and emergency operation modes by improving the representation of non-linear differential equations of individual elements and taking into account their mutual influences was improved, the use of which increases the efficiency of design of mine power networks. Results - the important scientific and technical problem of improving the operating efficiency of electrotechnical complexes of mine electrical network based on improved methods of transient analysis and protection against emergency modes allowing for the mining and trends of coal mining equipment development was solved. Industry is coal mines of Ukraine.