Dvornikov A. Facilities of anti-damage control and diagnostics for the systems of power supply of open-cut mines

Thesis is devoted to development of principles and hardwares of increase of level of operating reliability and improvement of terms of electrosecurity in the systems of power supply of the opened mining works. The engineering method of determination of values of isolation conductivity and its component separate phases in the three-phase asymmetric system with isolated midpoint wire, based on the artificial receipt of voltage of change midpoint wire by the inclusion of additional active conductivity to the phases of network, is offered. A method is capable of working at any possible phase voltages dissymmetry, conditioned by inequality of isolation conductivity. Reasoning is given and the developed device of protective disconnection at the precipice of wire of career air power transmission lines, that allows to disconnect an emergency line to appearance of shorting on earth, that sharply diminishes probability of development of failure due to the exception of action of internal overstrains, which accompany shorting on earth. First for the career systems of power supply on the basis of requirements of Rules of a particular branch, developed structure, algorithm and on a basis micro - computer is the executed synthesis of the control system, defence and diagnostics of career distributive substations and networks by voltage 6 kV. Within the framework of the system there is the developed algorithm, basic technical descriptions is validated and is realized device of the automatic repeated inclusion with the passing ahead control of voltage of network electric motor stopway and resistance of isolation of the disconnected joining for career distributive networks by voltage 6 kV