Essays about: "railway power system"
Showing result 11 - 15 of 26 essays containing the words railway power system.
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11. Compensating Unbalances in Synchronous Railway Traction Systems with Railway Power Conditioners
University essay from Uppsala universitet/ElektricitetsläraAbstract : The electrified railway presents significant challenges for the electrical grid. This is due to the characteristics of the constructed railway system. Trains are single-phase loads, fed by two adjacent phases from the grid. Feeding phases will change continuously at every substation. READ MORE
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12. Development and Optimisation ofInnovative Running Gear Conceptsfor an Ultra-High-Speed Train
University essay from KTH/SpårfordonAbstract : Since the last ten to 15 years, railway operators have to face new challenges which are an increased demand on comfort and high safety requirements, increased energy costs and the high competitive market situation. German Aerospace Center, DLR is designing a novel concept of an ultra-high-speed train with distributed propulsion system—the Next Generation Train (NGT). READ MORE
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13. Modeling of Electromagnetic Heating of Multi-coil Inductors in Railway Traction Systems
University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknikAbstract : Inductors are frequently used in railway electrical tractions systems in filtering and current limiting operations. Magnetic fields are generated due to the flow of large AC currents through the coils, which intend induce currents on the coils as well as the metallic components in the vicinity, causing electromagnetic heating. READ MORE
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14. Railway power supply system models for static calculations in a modular design implementation
University essay from KTH/Elektriska energisystemAbstract : Several previous theses and reports have shown that voltage variations, and other types of supply changes, can influence the performance and movements of trains. As part of a modular software package for railway focused calculations, the need to take into account for the electrical behavior of the system was needed, to be used for both planning and operational uses. READ MORE
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15. 3D High Frequency Modelling of Motor Converter and Cables in Propulsion Systems
University essay from KTH/Elektroteknisk teori och konstruktionAbstract : The use of the power converters in railway traction systems introduces high frequency electromagnetic interference (EMI) in the propulsion system, which causes electromagnetic compatibility (EMC) problems. These high frequency phenomena come from fast variations of current and voltage during the switching operations in the power converter. READ MORE
