In fact, the optimal and efficient operation of any energy conversion systems, eg, microgrids, traction networks, etc, necessitates some sorts of control strategies being structured into two main parts and exploiting two-level voltage source converters (vscs), this thesis introduces several control strategies in the context of. Stephan_080915_openpowernet_englppt (figure 4) – simulation of railway power supply comprail 2008 energy consumption simulation for electrical railway systems requires detailed information concerning initial situation • each train's driving state and its required traction power. Theses and internships select a project type comparative study of pmsms and pm-less motors for electrical-vehicle traction - proposal design and control of evaluation of the future adequacy of the belgian power system and evaluation of the flexibility needs and the reserve requirements - proposal examining. Railway transportation is facing increasing pressure to reduce the energy demand of its vehicles due to increasing concern for environmental issues this thesis presents studies based on improved power management strategies for railway traction sys- tems and demonstrates that there is potential for improvements in the. 11 statement of problem and thesis objectives the power system integration of plug-in electric vehicles (pevs) and the possibility of bidirectional power exchange between them and the host grid have attracted attentions recently [1,2] in addition to providing traction power, batteries in a pev can potentially be used for. Integrated advanced hybrid configurations”, “efficient rail traction and sustainable energy supply” etc acknowledgements the present activities in the field of electric public transport have attracted attention in estonia and in other countries these include: 1 estonian association of transport and roads nominated the thesis.
The overall goal of the present thesis is to acquire knowledge concerning stability in the traction power system, focusing mainly on the low-frequency oscillations and interaction between electric rail vehicles and this particular rotary converter an important part of this work is to establish a connection between the fields of. A new system based on a power electronic transformer has been proposed in this thesis it is installed in the traction substation and regulates the voltage, to the characteristics of the train crossing that section of the rail it consists of a high frequency transformer with a three phase matrix converter in its input,. Component of the traction demand and regenerative braking power there are many topologies through which the battery and sc can be interfaced with the dc bus two partially-decoupled topologies have proved to be the most promising candidate topologies for a hybrid energy storage system (hess) in the first hess.
Reduce line losses and increase available power to the vehicle the control schemes for reactive power were designed assuming the electric traction power system was fed by one or more stiff voltage sources the master thesis should investigate the performance of the proposed control schemes in a system supplied. 26 high-speed lines, such as ice in germany, acela in the us, crh in china and tgv in france the advent of modern power electronics and ac asynchronous traction motors has considerably reduced the volume of traction equipment this, along with other technological developments, has facilitated the development of. This paper analyses the quality of electricity in railway traction power quality characteristics have been mea- sured as a case study in a traction sub-station in tamil nadu, india, where 1400 kvar capacitor bank is installed the actual data has been obtained through direct supply of traction load. The work carried out in this master thesis focuses on the design of the ac network of dc electrified transit railways a simulation model has been built to study the influence of the architecture of the ac network on the sizing of the power supply system the 1st part of this report provides the basic principles of electric traction.
Dissertation is accepted for the commencement of the degree of doctor of science in natural and exact sciences on april, 2008 supervisor: prof juhan laugis, faculty of power engineering opponents: professor ryszard strzelecki, dsc, phd, gdynia maritime university poland professor ivars rankis, dr sc eng, riga. This paper, the effects of the traction vehicle operation with three- phase induction motors on power quality in 110 kv transmission network are investigated the electric traction system 25 kv, 50 hz and the traction vehicle with 3f induction motors were modeled including ac/dc rectifier and dc/ac inverter. Rectifiers are placed at the power substation to convert ac to dc power for the traction the converter produces harmonic currents and injects them in the power grid during its operation - harmonic current propagates through the electrical system of the traction network and may cause additional thermal losses through.
Master of science thesis in electric power engineering list of notations table of notations used in this thesis a acceleration [m/s2] acatenary cross-sectional area of catenary [mm2] d distance [m] f force [n] g gravity of earth the available traction force equals the resistive force subjected to the train this is. High-power dc-dc converter technologies for smart grid and traction applications mendeley csv ris bibtex download abstract (adobe pdf, 7501kb) fulltext (adobe pdf, 2328mb) thumbnail open access author ortiz , gabriel date 2014 type doctoral thesis altmetrics download abstract ( adobe pdf. Keywords: ac railway power supply, traction power system, stability, advanced electric rail power systems this is formally only valid in vicinity of the linearization point a common way to describe a linear or linearized system is by a state space model as in umformern, doktor ingenieur thesis, fakultät für technik und. Development of a traction control system for a parallel-series phev thesis presented in partial fulfillment of the requirements for the degree master of power the rear axle a 340 v lithium ion battery pack acts as the energy storage system for the electric drivetrain components the front and rear powertrains are not.
The features of three modes of at-fed traction power networks (tpns) have been briefly described in the existing literature, which is not adequate yet in this paper, these three modes of tpns are compared mainly on tpn capacity, transformer capacity, rail potential and voltage level, etc, and conclusions are drawn.
Optimising the input filter of traction installations in dc railway power systems master of science thesis for the degree of master of science in electrical power engineering at delft university of technology alexander jongeling 6th july 2017 faculty of electrical engineering, mathematics and. The scope is not limited to regions where both types of traction system run in parallel it also include the vcos separate the ac traction power supply of the new lines from the dc power supply of the existing lines thesis was entitled safety and emc aspects of grounding, experimental studies in high-power systems. Essayshelp com thesis statement hospitality services global warming thesis paper thesis phd traction power where does a thesis statement go tactile best custom essay uk palmy orton communalize reassembly reconsolidate sided thru essaystudio global market essays dissertation 14578 the.