Bozhko V. Stabilizing converting unit booster type of high efficiency for the traction power supply of direct current of electrified railways.

The object of research: the process of energy conversion in traction substation DC reverse pulse-controlled boost converter to two-quadrant gate-controlled keys alternating voltage. Investigation task: converter efficiency stabilizing aggregates of traction substations DC voltage 3.3 kV consisting of phase controller rectifiers and reverse pulse-controlled converters boost converter on two-quadrant gate-controlled keys alternating voltage to the node short current limit. Research Methods: theory of electrical circuits, harmonic analysis method, the method of equivalent resistance at the synthesis of automatic control and development of analytical model of the converter output parameters with regulators; simulation to study ways to manage booster converter. Theoretical and practical results: scientifically proved the possibility of without throttling stabilizing converter units creation with reverse pulse-controlled converter to two-quadrant gate-controlled keys alternating voltage. The practical value confirmed by certificates of introduction of dissertation work results in SE SRCRT of Ukraine (Kyiv), in the Senior management electrification and power supply of Ukrzaliznucya (Kyiv), UE "Metro of Kyiv" (Kyiv). Novelty: a new concept of building of traction substation DC, is based on consistent application of boost converter, which realizes the function of active filter and contain parallel node of fast current limit allowing disconnect the filter throttle and get rid of the resonant circuit. Degree of introduction: results of the thesis are introduced in SE SRCRT of Ukraine in the process of scientific development and modernization in the design of high DC traction substations, In the Senior management electrification and power supply of Ukrzaliznucya in developing technical documentation for the prototype 12-pulse transforming unit with reverse boost and contactless short circuit protection for DC traction substations, In UE "Metro of Kyiv" to improve energy and quality of electricity supplying and traction systems. Field of use: electrical transport.