Simulation model and harmonic analysis of SS6b electric locomotive based on PSCAD/EMTDC

Basic structure and operational principle of medium frequency furnace (MFF) are introduced in this paper. The characteristics of harmonic currents produced by MFF are analyzed theoretically. A harmonic analysis simulation model for MFF with 12-pulse reciter based on Matlab/Simulink is presented. The validity of it is proved for the simulation harmonic currents accord to the theoretical anticipation. This model could be used to predict the harmonic of MFF not in operation. Based on this model, potential harmonic pollution of a new steel plant is studied by simulation with Matlab/ Simulink.

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Simulation Model of Traction Systems for CRH2 EMU Based on PSCAD/EMTDC

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.328-330.662 ◽

2011 ◽

Vol 328-330 ◽

pp. 662-666

Author(s):

Fa Yun Ma ◽

Hua Wei Li ◽

Bing Guang Han ◽

Jian Zhong Xu

Keyword(s):

Simulation Model ◽

Vector Control ◽

Control Strategy ◽

High Speed ◽

Control Method ◽

Low Frequency ◽

Current Control ◽

Electric Locomotive ◽

Electrified Railway ◽

Vector Control Strategy

The high-speed railway based on electromechanical integration develops rapidly in China in recent years. In order to improve research for electrified railway, a model of AC-DC-AC electric locomotive is established using electro- magnetic transient software PSCAD/EMTDC. In this paper, a single-phase tri-level rectifier of unit power factor and its control strategy of direct transient current control method are introduced at first. And then the working principles of the voltage space vector control strategy of inverter and the vector control strategy of cage motors are analyzed. The inverter and the motors must be as a whole because of the realization of motor vector control based on SVPWM inverter. At last, a model is established and the correctness and effectiveness of the model can be verified by the corresponding theory results. The simulation model is useful for the analysis of low frequency resonance in locomotives. The results will be applied in the research of mechanics and electric coupling in high speed electrified railway.

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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 ◽

10.20295/2223-9987-2020-3-41-63 ◽

2020 ◽

pp. 41-63

Author(s):

T. M. Nazirkhonov ◽

◽

А. Y. Yakushev ◽

I. P. Vikulov ◽

◽

...

Keyword(s):

Computer Simulation ◽

Spectral Analysis ◽

Simulation Model ◽

Alternating Current ◽

Input Current ◽

Computer Simulation Model ◽

Electric Locomotive

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Investigation of the energy characteristics of a reactive power compensating device with adjustable inductance in an electric traction network on an experimental setup

Proceedings of Petersburg Transport University ◽

10.20295/1815-588x-2020-4-534-544 ◽

2020 ◽

Vol 17 (4) ◽

pp. 534-544

Author(s):

A. N. Marikin ◽

◽

V. A. Miroshchenko ◽

Keyword(s):

Harmonic Analysis ◽

Physical Model ◽

Reactive Power ◽

Practical Importance ◽

Measuring Instruments ◽

Experimental Setup ◽

Electric Locomotive ◽

Load Range ◽

Higher Harmonics ◽

Traction Network

Objective: Checking the theoretical provisions of the possibility of controlling the reactive power of an adjustable inductance compensating device. Testing and optimizing the algorithm of the reactive power regulating device. Assessing energy effi ciency of the device. Checking stability of the device in transient modes. Suggesting methods to improve stability of the system. Conducting a harmonic analysis of current and voltage curves obtained as a result of physical modeling, developing ways to suppress higher current and voltage harmonic. Methods: The scheme of the experimental setup was built, the electrical element base was selected, the measuring instruments used were determined, the experimental stand was assembled. Curves of changes in current, voltage, active and reactive power were taken on the physical model for operating modes without a compensating device, with an unregulated and adjustable compensating device. The change in current for critical transients is analyzed. To evaluate the fi ltering of higher harmonics of current and voltage by a compensating device, oscillograms were taken in operating mode with a load and after adding a diode bridge to the electric locomotive circuit, and their harmonic analysis was performed. Results: The adjustable device provides reactive power compensation in the load range of no less than 90 %. Additional measures are required to lower the active resistance of the compensating device reactor. The use of a reactor connected in series with a capacitor reduces the switching current and overvoltage in the device. The compensating device can operate in the mode of a broadband fi lter of higher harmonics. Practical importance: A physical model of an alternating current traction network with a reactive power compensating device and a controlled variable inductance has been created, which makes it possible to analyze both instantaneous and long-term processes in the traction network.

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