Investigation of the efficiency of smoothing devices converting units traction substations DC
Journal Title: Інформаційно-керуючі системи на залізничному транспорті - Year 2018, Vol 23, Issue 6
Abstract
The article considers ways to improve the quality of the energy supply of electric rolling stock of DC railways. An analysis of the work of smoothing devices used in traction substations is performed to compensate for the variable component of the output voltage. In the case of asymmetry of the input voltage of the transformer unit in the traction network, non-canonical harmonic components of the output voltage of the traction substation of a direct current are generated, for their suppression, too cumbersome smoothing devices are required. The study of smoothing devices was carried out on simulation computer models and it was found that in the case of asymmetry of input voltages by the rectifier unit, it is generated in the output voltage of the harmonics at a frequency lower than the main, frequency of the supply network, which is called the non-canonical harmonics of the variable component of the output voltage of the traction substation. They are not suppressed by any passive filter, in addition, the voltage pulsation factor increases and creates a significant interfering effect on the device of the automatic locking system. To avoid such problems, it is necessary to reduce the resonance frequency of the LS-filter to the necessary value, which excludes the enhancing properties of the smoothing device at frequencies of the harmonic components in the range of non-canonical harmonics.
Authors and Affiliations
O. Semenenko, O. D. Suprun, Y. O. Semenenko, M. Tkachenko
Keywords
Related Articles
- EP ID EP499904
- DOI 10.18664/ikszt.v0i6.151636
- Views 144
- Downloads 0
Using mathematical models of dynamic systems "crew-track" powers to study the interaction of rolling stock and tracks underground
Most studies that have examined the interaction track and rolling stock, defined vertical or horizontal lateral forces acting on the track by driving crews in straight and curved sections of track. However, in terms of...
Development of mathematical model of process of flowing around of carriages the current of air
The analysis of work of different subsystems of automatic control of speed of rolling wagons is conducted in automated control system by marshaling yards. New scientific approach is formed about determination of potentia...
Energy characteristics of single-phase active current-source rectifier with sinusoidal and trapezoidal pulse-width modulation
A high power factor (more than 0.9) of AC electric locomotive with traction DC motors can be obtained using traction converters with full-controlled IGBT transistors. Now the actual task is the development of energy-effi...
Method of estimation the efficiency of image segmentation
The article is devoted to the development of a method for evaluating the efficiency of segmentation of textual informative image areas, similar in color and structure, obtained as a result of aerial photography. Remote s...
Selecting the Sensor Type for the Point Sensor
A key aspect in the development and production of new point sensors that would function reliably in a railway operating environment and would be competitive at a price is a sound choice of the element base. This is based...