Electric Traction
Course Description
Electric traction supply systems: 600 V, 1500 V and 3000 V dc, 15 kV alternating at 16 2/3 Hz, and 25 kV and 2x25 kV alternating at 50 Hz. Economic criteria and conditions for railway electrification. Main components of electric traction systems: power sources, electric traction substations, electric traction motors. Types of contact networks: uncompensated, semi-compensated and compensated. Mathematical model of electric traction vehicle movement; driving modes. Traction force. Calculation of electrical conditions in the contact network: voltages, power and energy required for traction. Sizing of stable electric traction substations. Influence of unsymmetrical load of the traction substations on a three-phase high voltage network. Influences of electrified lines on interference and hazard voltages in telecommunication circuits and on signaling and control devices. Electric and magnetic fields under contact lines and near electrical traction facilities. Electric power supply of high-speed railway .
Learning Outcomes
- define the basic physical laws and principles required to model the traction system
- explain the method of calculation of traction and braking of trains
- describe existing traction power systems
- describe the main components of the electrical traction system
- perform the power supply calculation of stable traction power substations
- analyze the environmental impact of stable electric traction substation
Forms of Teaching
Lectures
Lectures will be held 2 hours a week.
ExercisesAuditory exercises will be held in 7 cycles lasting 2 hours per week.
Field workVisit to traction station Zaprešić.
Independent assignmentsSeminar.
Grading Method
Continuous Assessment | Exam | |||||
---|---|---|---|---|---|---|
Type | Threshold | Percent of Grade | Threshold | Percent of Grade | ||
Homeworks | 0 % | 15 % | 5 % | 0 % | ||
Class participation | 0 % | 5 % | 0 % | 0 % | ||
Seminar/Project | 0 % | 20 % | 10 % | 0 % | ||
Mid Term Exam: Written | 0 % | 25 % | 0 % | |||
Final Exam: Written | 0 % | 20 % | ||||
Final Exam: Oral | 15 % | |||||
Exam: Written | 50 % | 30 % | ||||
Exam: Oral | 50 % |
Week by Week Schedule
- DC 600 V, 1500 V and 3000 V, AC 15 kV 16 2/3 Hz, 25 kV and 2x25 kV 50 Hz
- Economic and technical criterions and conditions for railway electrification
- Main components of electrical traction systems: traction power substations, railway network section switchgear
- Construction and types of the contact line systems: non-compensated, semi-compensated and compensated
- Determination of the electrical parameters of the railway traction lines
- Regime of traction vehicle drives, tractive effort, Calculations of the electrical conditions in the contact line system: voltages, powers and energy demanded for the traction
- Calculations of fault currents in the power supply systems for electrical traction
- Midterm exam
- Power and energy demand, Connections of the stable traction power substations in the three phase power system
- Allowed unsymmetry of voltages and currents, Radial and parallel operation of traction substations
- Supply of the 2x25 kV system from the 1x25 kV system, Interference- and danger- voltages in telecommunication, signal and control circuits and equipment
- Electric and magnetic fields under contact lines and in proximity of the traction power installations
- Influences of eddy currents on underground metallic pipes and cables
- Power supply of high speed rail, Electromagnetic levitation
- Final exam
Study Programmes
University graduate
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Literature
I. Švaljek, T. Kožulj, M. Bošnjak (2003.), Tehničko-eksploatacijski pokazatelji i značajke vučnih vozila Hrvatskih željeznica,, Željeznička tiskara d.o.o
Zavada, Josip (2004.), Željeznička vozila i vuča vlakova, Fakultet prometnih znanosti
Krzysztof Karwowski, Adam Szeląg (2009.), Modern electric traction, Gdansk University of Technology
Lecturers
For students
General
ID 222575
Winter semester
5 ECTS
L1 English Level
L1 e-Learning
30 Lectures
0 Seminar
15 Exercises
0 Laboratory exercises
0 Project laboratory
Grading System
90 Excellent
75 Very Good
65 Good
55 Sufficient