| EPE 2015 - DS3l: Industry Specific Energy Conversion and Conditioning Technologies | ||
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 | A Novel Satellite Power Supply Design with Multi-winding High Frequency Transformer
By XUAN ZHANG | |
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Abstract: This paper proposes a new power supply system with multi-winding high frequency transformer forspacecraft. This structure drives loads of various voltage levels. It can provide a bi-directional powerinterface for battery clusters and realize electric isolation. Energy management strategies are proposedto improve efficiency and balance the power flow between sources and loads of different voltagelevels. All possibilities of the power flow are presented and analyzed. Validity of the proposedstructure and its control algorithm are verified by simulation results.
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| | A Study on a Method to Design Energy Capacity of Wayside Energy Storage Devices in DC-electrified Railway Systems
By Hiroyasu KOBAYASHI | |
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Abstract: In this paper, a method to design energy capacity of wayside energy storage devices (ESDs) is proposed, considering the energy-saving effect and the cost performance of ESDs. Then, the designing method is verified by the numerical simulations. It is also revealed that the train operating diagram does not affect the proposed method to design energy capacity of ESDs.
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| | Anti-slip re-adhesion control method for increasing the tractive force of locomotives through the early detection of wheel slip convergence
By Michihiro YAMASHITA | |
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Abstract: We have developed a re-adhesion control method for increasing tractive force through early detection of wheel slip convergence, using less delayed rotational acceleration signal than the conventional one for slip detection. We focus on the effect of the restraint of tangential force change by the early slip convergence detection. Accordingly, the slip induction of other axes is restrained and increase of tractive force of locomotives is expected. Its effectiveness has been verified by simulation tests and running tests using a HD300-Type diesel hybrid shunting locomotive.
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| | Control development for an 18 MW pulsed power converter using a real-time simulation platform
By Charles-Mathieu GENTON | |
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Abstract: In the frame of the LHC Injectors Upgrade (LIU) project, a new main power supply (MPS) for the PSBooster accelerator is required. The largest element of the new MPS is the 18 MW main power converter (MPC). The paper presents the design of the MPC control software, using Rapid Control Prototyping.
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| | Development of emergency self running train for energy utilization in stationary energy storage system
By HIROTAKA TAKAHASHI | |
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Abstract: The SESS(Stationary Energy Storage System) using a lithium-ion battery has been introduced and operated both in Japan and overseas for the purpose of taking measures for regeneration cancellation, voltage drop compensation and energy conservation. Considering the battery characteristics, the SESS, which can store sufficient electric energy, is applicable for emergency self-running of trains during a wide-area power failure in the event of major disaster. Various research and development projects using the SESS were carried out and the demonstration test was conducted.
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| | Downsizing an Electric Actuator Supplied With Variable Voltage Using an Interlaced High Frequency Boost Converter for More Electric Aircrafts
By Jérémy CUENOT | |
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Abstract: The variable speed of generators in aircrafts implies the voltage variation which leads to the over-dimensioning of the VSIs of actuators. The aim is to show that interlaced high frequency Boost-converters in cascade with the VSI, may lead to reduce the actuators global size without reducing their efficiency.
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| | Ensuring the operation of electrical equipment during short time voltage sags or power outage
By Martin PITTERMANN | |
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Abstract: This paper describes the situation of a modern electric drive (induction machine supplied from indirect frequency converter with voltage source inverter) in industry (paper mills, etc.), where a voltage sag can bring significant problems with long-time interruption of the production process. One method of operation is a direct increase of voltage in the DC-link of a frequency converter with a step-up converter during voltage sag. A transistor designed for braking is often used. It is used often present transistor designed for braking. The article presents the waveforms of voltages and currents in the circuit of an indirect frequency converter in the case of voltage sags without the intervention of a step-up converter. Then it presents waveforms with the use of a boost converter and its various control options.
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| | Evaluation of energy loss in d.c. traction power supply system
By Taichi HIRANO | |
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Abstract: For the purpose of further energy consumption reduction in d.c. traction power supply system, it is important to understand the overview of energy flow from generation and consumption and evaluate energy loss in each energy conversion stage .In this paper, supposing traction power supply system of East Japan Railway Company who has own power plants for railway and 154kV transmission line, the rough estimations of energy flow and energy loss are carried out.
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| | FAULT TOLERANT DUAL-MOTOR DRIVES: SIZING OF POWER ELECTRONIC
By Tiago José DOS SANTOS MORAES | |
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Abstract: This paper analyzes two dual-motor fault-tolerant topologies. The first one supplies independently both machines while the second one connects them in series for reducing the number of transistors. For a given DC-link voltage, the converter component sizing is based on the peak current obtained in the normal and degraded modes.
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| | Global current regulation and Ah compensation for aluminum electrolysis substation
By Camal AÏT MAHREZ | |
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Abstract: In the framework of aluminium electrolysis, the goal of the substation is to provide a high amperage direct current. If any delay occurred in generating that current, the consequences on aluminium production may be important. It becomes then a priority to remove that delay. To manage such issue, substation operators are used to manage in manual way to adjust the current which have to be provided. In this paper we propose a simple automatic method in relation with a global current regulation to manage such ampere hour compensation.
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| | Investigation of a Waste Heat Recovery System for a More Electric Ship
By CHAROULA ZOGOGIANNI | |
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Abstract: Several types of energy recovery systems (i.e. shaft generators etc.) have been installed in marine vessels, in order to reduce the fuel consumption and ultimately improve the efficiency of the vessels. In this paper, an energy recovery system utilizing the thermal losses of a real ship is investigated. The main goal of this work is to improve the overall efficiency of the ship. Therefore, a theoretical study and apparatus selection is conducted for every part of a proposed Waste Heat Recovery System. Moreover, simulation results of each part, as well as of the whole system, are presented in this paper.
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| | Modular Multilevel Converter Based Super-capacitor Integration Strategies and their Comparative Evaluation for Railway Traction Drive Systems
By NILANJAN MUKHERJEE | |
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Abstract: Modular multilevel converters are an emerging class of converters for traction applications. Supercapacitor energy storage integration within the sub-module provides multiple advantages compared to the traditional two-level design in terms of reliability, power quality, drive efficiency and recovery of regenerative energy. This paper explores different topologies of modular multilevel converters with integrated supercapacitor energy storage system for the typical voltages (750 V, 1.5 kV and 3 kV) of the railway traction system. The paper first derives different ways of integrating supercapacitor modules using a modular multilevel configuration. Thereafter, a detailed comparison in terms of converter cost/VA rating, reliability and suitability for traction drive systems have been presented to identify the most suitable modular converter scheme with integrated energy storage.
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| | New Modular Hybrid Energy Storage System and its Control Strategy for a Fuel Cell Locomotive
By Ivan KRASTEV | |
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Abstract: A new hybrid modular converter structure is proposed for a fuel cell railway vehicle. It uses a modular multilevel converter arm and a cascaded boost converter to interface the energy storage elements (batteries and supercapacitors). Novel control architecture is presented to control energy flow between the storage blocks, as well as vehicle speed-based energy management system. To validate the proposed converter, a system was sized, and simulated, for the refurbishment of a Class 150 DMU.
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| | Parallel-connected bidirectional converters for avionic applications
By Francesco GIULIANI | |
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Abstract: This paper proposes a fully FPGA controlled Bi-Directional Converter (BDC) for avionic applications. The dissertation starts with an overview of the proposed converter, followed by the description and the mathematical analysis of the Dual Active Bridge (DAB) topology. Then, the control laws for both single and parallel modes are presented. In particular, the discussion on the paralleling of power converters with current sharing is the main contribution of this study. Simulations and experimental evaluations that illustrate the behavior of the BDC unit are given throughout all the specific sections.
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| | Requirements to change from IGBT to Full SiC modules in an on-board railway power supply
By ANDREAS MAERZ | |
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Abstract: In this paper the difference in switching characteristic and switching losses together with the effects of parasitic elements between silicon and silicon-carbide devices on the loss distribution are reviewed. A comparison between a standard silicon IGBT module and a Full SiC MOSFET module is being made on the basis of equal voltage overshoot and maximum switching speed of both devices. Potentials and limitations between the both devices are discussed for the use of Full SiC power module in on-board power supplies for railway application.
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| | The design and performance of Static Var Compensators for particle accelerators
By Karsten KAHLE | |
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Abstract: Particle accelerators, and in particular synchrotrons, represent large cycling non-linear loads connected to the electrical distribution network. This paper discusses the typical design and performance of Static Var Compensators (SVCs) to obtain the excellent power quality levels required for particle accelerator operation.
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| | Torque ripple minimization of SMC drive for an innovative electric naval propulsion system
By Mustapha DEBBOU | |
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Abstract: This paper deals with torque ripple minimization using a degree of liberty offered when the Doubly Fed Induction Machine is employed in Electrical Naval Propulsion. Various strategies have been carried out on the analysis and the reduction of torques ripples. The torque ripples can be reduced by either the machine design or control methods. The authors introduce a new technique to decrease its torque ripples using the control strategy. Simulation results and experimental tests are presented and discussed.
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| | Traction Inverter System with Lithium-ion Batteries for EMUs
By MASATAKA AYATA | |
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Abstract: Traction inverter system with Lithium-ion batteries for electric multiple units (EMUs) is developed in order to utilize the regenerative electric energy and to reduce peak power at substations. In the system, Lithium-ion batteries unit is connected to the DC link of the traction system in parallel via the DC-DC converter which controls storing and supplying battery power. In powering mode of the train, this system reduces peak power at substations by supplying electric power from the batteries unit. In braking mode of the train, this system prevents getting higher of overhead line voltage by storing excess regenerative power, and saves energy consumption by using battery energy for train powering. This system is installed in one of the Seibu 20000 series which are the commuter trains of SEIBU Railway Company. The traction system with Lithium-ion batteries for EMUs has been evaluated in commercial operations on the Seibu Sinjuku Line since October 2013, and it is confirmed that this system can save energy consumption of 26\% and peak power at substations is reduced by 13\%. This trial in commercial operations is continued until September 2015.
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| | Verification of Stochastic Tram Model Based on Real Traffic Data
By Lubos STREIT | |
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Abstract: This paper describes verification of the stochastic tram model developed from a real traffic conditions data. The trams traffic data are measured on the real tram line. The model can reliable simulates power flow, overhead line losses and energy storage system efficiency.
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