Electric Traction Power Supply
Knowledge of electric traction systmes working principle, calculations methods, dimensioning and their enivormental impact.
- define the basic physical laws and principles necessary for modeling the traction system
- explain the calculation method of traction and braking trains
- describe the existing power systems of electric traction
- describe the main components of the electric traction system
- apply a railway power flow calculation
- analyze environmental impacts of railways
Forms of Teaching
Llectures are two hours per week.Exams
It consists of exams and seminars.Consultations
After the lecture or by appointment.Seminars
Practical work of students.Internship visits
Visit of the new electric substation Zaprešić.
|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||30 %||50 %|
|Exam: Oral||50 %|
To access the oral examination is necessary to collect 50 points from homework, mid-term exams and the written part of the final exam.
Week by Week Schedule
- Overview of the traction power supply: direct voltages 600 V, 1500 V, 3000 V, alternating voltage 15 kV with frequency 16 2/3 Hz, alternating voltages 25 kV and 2x 25 kV with frequency 50 Hz.
- Economic and technical criterions and conditions for railway electrification.
- Main components of electrical traction systems: traction power substations, contact line systems, 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.
- Mathematical model of the train movement: 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.
- 1st knowledge test
- 1st knowledge test
- Locations and sizing of the stable traction power substations; 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 in power supply systems. Supply of the 2x25 kV system from the 1x25 kV system.
- Impact of contact line systems on 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 very high speed trains. New power supply for rapid transport systems; electromagnetic levitation.