COMPUTER SIMULATION MODEL OF THE TRACTION TRANSFORMER OF THE AC ELECTRIC LOCOMOTIVE OF THE O'ZBEKISTON SERIES

COMPUTER SIMULATION MODEL OF THE TRACTION TRANSFORMER OF THE AC ELECTRIC LOCOMOTIVE OF THE O'ZBEKISTON SERIES

Tulagan Nazirkhonov

cand. those. Sciences, Acting Associate Professor Tashkent State Transport University,

Uzbekistan, Tashkent

Rakhimbergan Polvonov

Master Tashkent State Transport University,

Uzbekistan, Tashkent

КОМПЬЮТЕРНАЯ ИМИТАЦИОННАЯ МОДЕЛЬ ТЯГОВОГО ТРАНСФОРМАТОРА ЭЛЕКТРОВОЗА ПЕРЕМЕННОГО ТОКА СЕРИИ «O’ZBEKISTON»

Назирхонов Тулаган Мансурхон угли

канд. техн. наук, и.о. доц., Ташкентский государственный транспортный университет,

Узбекистан, г. Ташкент

Полвонов Рахимберган Бахтияр угли

магистр, Ташкентский государственный транспортный университет,

Узбекистан, г. Ташкент

ABSTRACT

Develop a computer simulation model of a traction transformer in the Matlab environment Simulink AC electric rolling stock series "O'zbekiston". The main parameters of the traction transformer windings for simulation are based on passport data, idling and short circuit experiments. The conducted simulation testifies that the parameters of the computer simulation model correspond to the characteristics of the traction transformer of electric locomotives of the “O'zbekiston” series. The developed mathematical model of the traction transformer is an integral part of the complex simulation model of traction converters and asynchronous traction drive of the electric locomotive of the “O'zbekiston” series.

АННОТАЦИЯ

Разработать компьютерную имитационная модель тягового трансформатора в среде Matlab Simulink электроподвижного состава переменного тока серии «O’zbekiston». Основные параметры обмоток тягового трансформатора для проведения моделирования находится на основе паспортных данных, опытов холостого хода и короткого замыкания. Проведенное моделирование свидетельствует о том, что параметры компьютерной имитационной модели соответствуют характеристикам тягового трансформатора электровозов серии «O’zbekiston». Разработанная математическая модель тягового трансформатора является составной частью комплексной имитационной модели тяговых преобразователей и асинхронной тягового привода электровоза серии «O’zbekiston».

Keywords: Traction transformer, idling, short circuit, simulation, electric locomotive, alternating current.

Ключевые слова: Тяговый трансформатор, холостой ход, короткое замыкание, моделирование, электровоз, переменный ток.

There is an urgent problem of increasing the energy efficiency of railway transport, associated with an increase in the operational energy performance of electric rolling stock (ERS). An important step in this direction is to conduct research using computer simulation models that make it possible to reproduce electromagnetic processes in a traction electric drive and converters that are adequate to the real conditions of using converters with various control algorithms in traction and regenerative braking modes on an ERS, as well as to perform the functions of processing the results obtained. modeling.

Energy consumption of ERS in operating modes is recorded by regular measuring instruments - electricity meters. The components of the consumption and losses of electricity during the operation of the ERS can only be taken into account by analytical methods and with the help of computer simulation. To analyze the energy balance, it is necessary to determine the parameters, as well as the energy performance of the converters and units of the traction electric drive. The correct choice of parameters and characteristics of the traction transformer significantly affects the adequacy of reproduction using a computer model of electromagnetic processes in the power circuits of the ERS.

 Modern AC electric locomotives of the O'zbekiston series are equipped with single-phase traction transformers of the TBQ 36–8460/25 model. The configuration of the transformer windings is shown in Figures 1, 2. The parameters of the windings of the traction transformer TBQ 36–8460/25 are determined on the basis of passport data, no-load and short circuit tests given in the tables 1. [1].

Table. 1

Passport data of the transformer TBQ 36 - 8460/25

Figure 1. Winding diagram of the traction transformer TBQ 36–8460/25

Figure 2. Pictogram ( a ) and circuit design of the model of a multi-winding transformer of an electric locomotive ( b ) in the Simulink library

The block diagram of the computer model of the traction transformer of an AC electric locomotive, obtained in the Simulink editor, is shown in Figure 3. The adequacy of this model is assessed based on the simulation of idle modes and short circuits of all traction windings. Figure 4 shows diagrams of the idling experience, in Figure 5 - simulation of a short circuit of a traction transformer, [2-3].

Figure 3. Block diagram of the traction transformer of the AC electric locomotive "O'zbekiston" in the Simulink editor

Figure 4. Simulation of the open-circuit experience of a traction transformer:   - voltage and  - current of the primary winding of the transformer at idle, - voltage of the traction winding

When simulating the idling experience, the rated voltage was applied to the primary winding, the amplitude value of which is equal to

  V.

The amplitude value of the voltage of the traction winding of the computer model of the transformer in the idle mode

   V.

Figure 5. Traction transformer short circuit simulation:  - voltage,  and       - current of the primary and secondary windings of the transformer

Relative voltage error of the traction winding of the computer model of the transformer

The amplitude value of the no-load current of the network winding of the computer model of the transformer

   A.

Relative error of the no-load current of the primary winding of the computer model of the transformer

Magnetization characteristic of a typical computer model of a Multi-Winding transformer Transformer is linear, without saturation, so the no-load current obtained in this model has a sinusoidal shape without distortion, typical for the no-load current of a real transformer [3-6].

When modeling the short circuit experience, the calculated voltage was applied to the primary winding, the amplitude value of which is equal to

 V

The amplitude value of the current of the network winding of the computer model of the transformer

  A.

Relative error of the current of the network winding of the computer model of the transformer

The amplitude value of the current of the traction winding of the computer model of the transformer in short circuit modes

 A.

Relative error of the current of the traction winding of the computer model of the transformer

Conclusion

The obtained results of simulation of experiments of idling and short circuit of the traction transformer confirm the adequacy of the computer model to the real traction transformer. The calculated parameters of the traction transformer make it possible to reproduce the electromagnetic processes occurring in the traction drive of the electric locomotive of the "O'zbekiston" series of alternating current in the modes of traction and regenerative braking, close to real.

References:

1. Vikulov I.P. Comparative analysis of the technical characteristics of electric locomotives of the " O ' Z - ELR " and "O'zbekiston" series / I.P. Vikulov, T. M. Nazirkhonov // Izv. Petersburg. University of Communications. - St. Petersburg: PGUPS, 2019. - T. 16. Issue. 1. - S. 68-76.
2. Nazirkhonov T. M., Yakushev A. Y., Vikulov I. P. Spectral analysis of input current and voltage of an O'Z-ELR series alternating current electric locomotive 4q-s converter using a computer simulation model. Bulletin of scientific research results, 2020, iss. 3, pp. 41–63.
3. Nazirkhonov T. M., Yakushev A. Ya. Computer model of a traction transformer of O’Z-ELR series alternating current electric locomotive. Proceedings of Petersburg Transport University, 2020, vol. 17, iss. 3, pp. 416–427.
4. Yakushev A. Ya., Nazirkhonov T. M., Vikulov I. P., Markov K. V. Determination of the main parameters of an asynchronous traction electric motor. Proceedings of Petersburg Transport University, 2019, vol. 16, iss. 4, pp. 592–601.
5. Mikheev G. M., Shevtsov V. M., Ivanova T. G. Methods for determining the leakage inductance of power transformer windings // Vestn. Chuvash. University, 2009. - Issue. 2. – P. 45–52.
6. Chernykh I. V. Modeling of electrical devices in MATLAB, SimPowerSystems and Simulink / I. V. Chernykh. – M.: DMK Press; St. Petersburg: Piter, 2008. - 288 p.