Abstract
The object of research is the electrical processes in the control system of the traction drive of the electric locomotive VL-80K (Russia). To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters determined during experimental studies of the traction drive control system. In particular, it is important to use in the traction drive model the value of the voltages on the arms of the rectifier installation of the electric locomotive, taking into account the position of the driver's controller. The complexity of the simulation lies in the fact that the reference does not provide the value of the voltage on the arms of the rectifier for each position of the driver's controller, which makes it difficult to verify the resulting model. A scheme for measuring the voltage value on the arms of the rectifier installation of an electric locomotive for each position of the position of the driver's controller is proposed. On its basis, a simulation model is developed in the MATLAB software environment. The simulation model implements an algorithm for closing the contactors of the electric group contactor for each position of the position of the driver's controller. Approbation of the voltage measurement technique was carried out on an electric locomotive of the VL-80K series during a trip on the Darnytsia-Myronivka section (Ukraine). Comparison of the voltage values on the arms of the rectifier installation, obtained experimentally, with the passport data showed that the measurement error was 0.5 %. In addition, the experimental results showed that the voltages on the arms of the rectifier for paired positions of the position of the driver's controller are the same, for odd ones they are different. Therefore, when simulating the operation of the traction drive control system, the voltage values on different arms of the rectifier installation were taken separately. Comparison of the simulation results for the nominal mode with passport data showed that for this mode the measurement error was 3.78 %. For all others, it did not exceed 5 %.
Highlights
The study of dynamic processes in the traction drive of electric locomotives requires the construction of an adequate drive model, through which it would be possible to determine certain characteristics of the drive with a high degree of certainty [1]
The object of research is the electrical processes in the control system of the traction drive of the electric locomotive VL-80K (Russia)
To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters determined during experimental studies of the traction drive control system
Summary
The study of dynamic processes in the traction drive of electric locomotives requires the construction of an adequate drive model, through which it would be possible to determine certain characteristics of the drive with a high degree of certainty [1]. Republic) series consists of pulsating current traction motors, a traction transformer, a group electrical contactor, a rectifier installation and a mechanical parts. When modeling such a traction drive, a number of difficulties arise. The question arises of the task on the model of the traction drive of the electric locomotive of the indicated series of the intensity of the change in speed. To study the electromechanical processes in the traction drive of the VL-80K electric locomotive in various operating modes of the electric locomotive, it is necessary to develop a control system with a program generator of the speed change intensity. The aim of research is to determine the inductances of the pulsating current traction motor as a function of the armature current
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