1,721,130 research outputs found
Sensitivity Analysis of the Constructive Parameters for the 2 X 25-kV High-Speed Railway Lines Planning
No full textThis paper presents a study of the AC 2 x 25 kV–50-Hz system for the train power supply, giving a valid instrument for better design of the future railway lines. In fact, different constructive solutions, such as the autotransformer
short-circuit voltage, can influence the correct working of the system. The analysis of the real currents distribution between the 2 x 25-kV system branches is presented, overcoming the circuital simplifications adopted in the traditional studies that have now been documented in the literature. The study is validated through simulation and in-field measurements
Smart City, La città si reinventa. Strumenti, Politiche e Soluzioni per un futuro sostenibile
No full textPreliminary analysis for the design of an energy-efficient and environmental sustainable integrated mobility system
No full textThe Exploitation of Vehicle-to-Grid Function for Power Quality Improvement in a Smart Grid
Full text linkSmart grids can be a good challenge for the near future if they are intelligently managed. Therefore, the exploitation of the energy resources distributed into a network is one of the most discussed themes in actual scientific literature, together with the attention paid to power quality (PQ) improvement. This paper aims to provide a possible solution to some common and dangerous PQ problems and voltage sags, considering the large diffusion of electric vehicles. A deep energy and power analysis to evaluate the feasibility of the vehicle-to-grid (V2G) function to compensate for PQ disturbances will be presented
Sistemi ferroviari alta velocità/alta capacità: analisi di Power Quality
No full textLa recente entrata in servizio commerciale delle nuove
linee ferroviarie ad Alta Velocità, che vedranno un primo
completamento alla fine del 2009, offre nuove prospettive
alla mobilità del Paese. Tuttavia gli innovativi sistemi di alimentazione e segnalamento richiedono un’approfondita
analisi relativamente alla qualità dell’energia, per garantire la compatibilità tra i diversi sistemi
New Stability Analysis for Tuning PI Controller ofPower Converters in Railway Application
No full textThis paper presents a mathematical dynamic model of single-phase four-quadrant (4Q) converters employed at the
input stage onboard high-speed trains. A new stability analysis
capable of considering the time-variant nature of the system
for the correct tuning of the feedback proportional-integral (PI)
controller has been implemented. In particular, the innovation
regards the application of a current-controlled modulation technique instead of the traditional PWM control currently used
in high power traction converters. A dedicated model of a real
converter installed onboard Italian high-speed trains has also been implemented in order to simulate its behavior and validate the theoretical analysis. Finally, a scaled-down prototype has been developed
- …
