Silicon (Si) insulated-gate bipolar transistors are widely used in railway traction converters. In the near future, silicon carbide (SiC) technology will push limits of switching devices three directions: higher blocking voltage, operating temperature, and speeds. The first MOSFET modules available on market look promising. Although they still limited breakdown these wide-bandgap components should improve traction-chain efficiency. Particularly, a significant reduction losses is expected...

Silicon (Si) insulated-gate bipolar transistors (IGBTs) are widely used in power converters. carbide (SiC) technology will push the limits of switching devices three directions: higher blocking voltage, operating temperature, and speed. The first SiC-metal-oxide-semiconductor field-effect transistor (MOSFET) half-bridge modules (SiC HBM) now commercially available look promising. Although they still limited breakdown these components should, for instance, improve traction-chain efficiencies....

Today, in electric railways, the old dc supply systems are reaching their limits. To improve efficiency and increase railroad traffic, a new electrification has recently been proposed at 9 kV. It is now necessary to prepare migration of infrastructure rolling stock, using power electronic transformers (PETs), for adaptation this voltage level. For application, high reduced volume essential. This article clearly demonstrates that it possible achieve compact, high-power, isolated dc-dc...

Silicon (Si) IGBTs are widely used in railway traction converters. In the near future, Carbide (SiC) technology will push limits of switching devices three directions: higher blocking voltage, operating temperature and speed. The first SiC MOSFET modules available on market look promising. Although they still limited breakdown these wideband-gap components should improve traction-chain efficiency. Particularly, a significant reduction losses is expected which lead to improvements...

Currently, in electric railways, the old dc supply systems are reaching their limits. In several European railway networks, due to line-voltage drops between substations, there sectors where traffic can no longer increase and locomotives cannot operate at nominal ratings. To improve power capacity, a medium voltage (MVdc) three-wire system with boosters based on imbricated cell multilevel choppers (ICMC) was proposed. order efficiency, authors evaluate potential of new SiC-mosfets this...

The 25-kV/50-Hz ac single-phase supply is a widely used railway system in France with length of 9,698 km. Overhead lines are supplied by substations drawing power from two phases three-phase utility. They behave as nonlinear and time-varying loads represent one the most important sources voltage unbalance for electricity-transmission network. In case weak networks, operators required to install compensation systems satisfy utility regulations avoid penalties regarding reactive consumption....

Silicon (Si) IGBTs are widely used in railway traction converters. In the near future, Carbide (SiC) technology will push limits of switching devices three directions: higher blocking voltage, operating temperature and speed. All all, these large-gap components should improve chain efficiency power-weight ratio. Thus, topology converter be reconsidered from input stage to inverter including DC bus. this paper, authors show prospects for developments voltage source inverters active front end

In order to improve the energy efficiency of railway traction power supply, a DC voltage 9 kV has recently been proposed. Beyond train this new system will allow connect several sources and/or loads (AC grid, storage, wind farm, solar panels, etc.). This "smart grid" require insulated DC-DC converters operating in medium frequency range (from 10 20 kHz) reduce size passive components (mainly transformer). and ranges targeted, is now possible thanks arrival on market modules based SiC...

Currently, former DC supply systems reach their limits. In several European Railway networks, there are sectors where it is not possible to operate locomotives at nominal ratings or increase traffic. Indeed, the line-voltage drops between substations leads severe limitations. To improve power capacity of line, a three-wire system with voltage boosters based on Imbricated Cells Multilevel Chopper (ICMC) was proposed. At first, principle recalled. Experimental results, performed test platform...

This article presents a decentralized control strategy for the balancing of cell voltages flying capacitor multilevel converter, implementing large number cells to address high conversion ratio. The originality this is that no reference required regulating leading an auto-balance capability. It composed several local cell-voltage controllers and global load-current regulator. For theoretical analysis purposes, change state variables proposed, new model converter. Then, study method performed...

At present, in several European railway networks using traditional DC electrification systems, it is not possible to increase traffic nor operate locomotives at their nominal power ratings. Trackside energy storage systems (TESSs) can be an alternative solution for the creation of new substations. A TESS limits contact line voltage drops and smooths absorbed during peak traffic. Thus, efficiency system increased while limiting costs environmental impact. This paper proposes a topology based...

Silicon (Si) IGBTs are widely used in power converters. Carbide (SiC) technology will push the limits of switching devices three directions: higher blocking voltage, operating temperature and speed. The first SiC-MOSFET Half-Bridge Modules (SiC-MOSFET HBMs) now commercially available look promising. Although they still limited breakdown these components should, for instance, improve conversion efficiencies. In particular, a significant reduction losses is to be expected which should lead...

DC railway electrification was deployed at the beginning of 20th century in several countries Europe. Today, this power system is no longer adapted to demands increased rail traffic. Due relatively low voltage level, current consumed by trains reaches kAs. So, worst case, locomotives cannot operate their rated due drop along contact line. Conventional solutions reduce consist increasing cross-section overhead lines or reducing length sectors installing additional substations. Nevertheless,...

Due to the increase in rail traffic, 25 kV/50 Hz single-phase substations can cause an unbalance phase voltages of upstream three-phase network. This situation becomes unacceptable for electricity transmission system operator and implementation compensator is inevitable. In recent years, several power electronic solutions have been proposed. They are based on Power Electronic Building Blocks (PEBB) which be connected series or parallel order achieve required level. offer advantages terms...