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2 2015

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Calculation of the Traction Power Supply Systems Using the Functions of Resistance

Bosiy D. O., Kosarev E. M.

Problemy Kolejnictwa

2015

Z. 168

7--14

The article is devoted to the development of a new method of calculating the instantaneous traction power supply circuits of the system. On the basic of the design scheme of generalized traction substations zone provided analytical functions of the resistance. Using the known functions of the current distribution of functions putted into the concept of resistance feeders traction substations. The functions of resistance and current distribution used in a more straightforward method of calculating the instant schemes that allow to formalize electrical calculations of electrical traction power supply systems.

Artykuł jest poświęcony nowej metodzie obliczania chwilowych schematów układów zasilania systemu trakcji elektrycznej. Na podstawie uogólnionych wyników dla odcinka między podstacjami pokazano zależności analityczne funkcji rezystancji. Z wykorzystaniem znanych funkcji podziału prądów trakcyjnych wprowadzono pojęcie rezystancji zasilaczy podstacji trakcyjnych. Łączne wykorzystywanie funkcji rezystancji i funkcji podziału prądów trakcyjnych pozwala na znaczne uproszczenie metody obliczania chwilowych schematów układów zasilania trakcji elektrycznej. Umożliwia to sformalizowanie obliczeń elektrycznych systemów zasilania trakcji elektrycznej.

Improving the quality of voltage in the system of traction power supply of direct current

Sychenko V. G., Bosiy D. O., Kosarev E. M.

Archives of Transport

2015

Vol. 35, iss. 3

63--70

Purpose of the work is improved approaches to ensure the required quality parameters of voltage in the traction network based on modern technologies and equipment in the application of power distribution system. Actuality. The introduction of high-speed traffic, increase weight standards Train necessitates increasing the carrying capacity of railways. Often the carrying capacity of existing sections electrified at 3.0 kV DC power supply unit limits. Such limitations include voltage decrease on the electric current collector below the allowable value for the normal operation of 2700 (2900 for high-speed V) and heating the contact wires, thereby losing their mechanical strength. Existing power supply system of RS, which have considerable installed traction substations, can not provide the required level of power density traction network for high-speed movement within 1.5 - 2 MW / km and, respectively, the required voltage quality. At the same time, the daily loading of a powerful traction substations in providing intensive schedule of trains does not exceed 20-25%, while the energy loss in traction network peak load increases and reaches 10-15% of the energy consumed. Thus, the existing system of power traction networks is not sufficiently effective and economical, even with the application of existing methods to strengthen them. In our view, the main limiting factor for a given quality of voltage in the traction network is the use of centralized power. From this, the development of measures to improve the quality of voltage in the traction network in the implementation of high-speed traffic in a growing scarcity of energy resources is an urgent task. Scientific novelty. Using distributed power supply system with adjustable supply points combined into intelligent power supply, which enables adaptive change the characteristics of the transfer, conversion and consumption and optimize the mode of functioning of the traction power supply is suggested for improving the quality of voltage in the traction network in the implementation of high-speed and heavy traffic. Practical significance. Improving the quality of voltage in the traction network by using the proposed circuit design traction power supply will ensure the desired mode voltage and power characteristics of the traction network in the implementation of high-speed and heavy traffic while reducing electricity losses by 20-30%.