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Information × Registration Number 0212U000878, 0110U006289 , R & D reports Title Experimental and theoretical researches emergency electric state of working traction network of the direct current electricpower supply system popup.stage_title Head Nickolay Kostin, Registration Date 16-05-2012 Organization Dniepropetrovsk National University of Railway Transport named after Academician V. Lazaryan popup.description2 The object of the study is a system of the direct current electric pulling of the railways of the Ukraine. The purpose of the work - experimental and basic researches emergency electric state of working systems of the electric pulling of the direct current, as well as development of the methods of the determination and system setting choice of protection feeder to contact network 3,3 kV. The methods of the studies - experimental, mathematical, электротехнические, information. In process of the system studies of the direct current electric pulling in condition Pridneprovskaya railway is determined main regularities and functional dependencies of the change the electric values, which describe the electromagnetic phenomenas in instationari condition working the considered system: short circuit in network without traction load; "take-off-osculation of" trolley to tractive wire. For result of the experimental studies and mathematical modeling, is installed efficiency of the work existing high-speed breakers tractive substation direct current. The new principle of feeder protection is offered from current of the short circuit, which is founded on velocities of the reduction front of the feeder voltage at initial time lag of the connecting emergency mode. Protection on offered principle allows: distinguish normal and emergency modes; distinguish the type of the short circuit ("close", "average", "distant"); liquidate the dead of the zone existing protectors. Variant microprocessor system protection tractive substation direct current is offered On base of the new sign. Microprocessor technologies and modern level of the theoretical knowledges that is based on result of mathematical modeling and dug experience to usages of the systems of direct current tractive supply are base of such system. New methods selective determinations electrictraction subsystems are designed with short circuits (tractive network or electric train), which are founded on so named method "remaining voltage" Product Description popup.authors Гаврильченко К.Т. Костін М.О. Михаліченко П.Є. Михаліченко Т.В. Підгорний В. О. Петров А.В. popup.nrat_date 2020-04-02 Close