开关电源的变频器逆变器项目研发DSP嵌入式电力电子系统电力系统及自动化设计.doc
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1、Simplified models of a single-phase power electronic inverter for railway power system stability analysisDevelopment and evaluation交通系统稳定性旳简化仿真模型分析 电力电子逆变器旳开发与评估措施Electric Power Systems ResearchUse of power electronic equipment has increased and introduced new dynamical phenomena in power systems. F
2、or example, new electric rail vehicles (locomotives) equipped with modern power electronic traction chains have caused situations of low-frequency power oscillations and instability in single-phase railway power supply systems. This paper presents the development and implementation of an instantaneo
3、us value model and simplified fundamental frequency (RMS) models of such an advanced electric rail vehicle in order to investigate their representation of low-frequency dynamics. The dynamical behaviour is studied by use of both time-domain simulations and linear analysis (eigenvalues) and the degre
4、e of simplifications regarding controller dynamics and power system dynamics are presented and discussed. An enhanced RMS model is tested in order to account for the impact of fast current dynamics on the low-frequency behaviour. The results show that this enhanced model is corresponding more closel
5、y to the instantaneous value model than what can be obtained by the traditional RMS simplifications and indicate that current dynamics should be included in stability studies involving power electronic inverters.Review of control techniques for inverters parallel operationThis paper presents state-o
6、f-the-art review of control methods applied currently to parallel power electronic inverters. Different system architectures, their modes of operation, management and control strategies will be analyzed; advantages and disadvantages will be discussed. Though, it is not easy to give a general view at
7、 the state of the art for the research area since it is rapid and going in different directions, this paper will focus on the main streams. This paper will start by briefly reviewing the current trends in power supply systems and the increasing importance for including power electronic devices. Next
8、, the different techniques to parallel inverters suggested in the literature will be checked. These can be categorized to the following main approaches: master/slave control techniques, current/power sharing control techniques, and frequency/voltage droop control techniques. Finally, based on the re
9、viewed state of the art, the study concludes by comparing the different approaches reported. In addition, their weaknesses and strengths are strained.Control of inverter-based micro-gridsThe predicted growth of small-scale non-50/60Hz power sources and the desire to be able to support loads independ
10、ently of the public electricity grid requires the development inverter-based micro-grids. Power electronic interfaces have very different characteristics to conventional electrical machines and, therefore, different operation, control and protection schemes are required. Attention also needs to be g
11、iven to the dominance of single-phase harmonically distorting loads in some networks and control schemes put in place that maintain voltage quality. A control scheme that exploits the controllability of inverters to operate a micro-grid and provide good power quality is examined and compared with bo
12、th traditional power systems and with control of dc/dc power converters. The limitations of communication and control bandwidth are discussed. Experimental results are used to illustrate the performance that can be achieved with various combinations of linear and non-linear, three-phase and single-p
13、hase loads.基于变频功能旳微电网/独立式电网/区域电网控制实行与研究Quality-driven model-based architecture synthesis for real-time embedded SoCsSystems ArchitectureThe recent spectacular progress in modern microelectronics created a big stimulus towards development of embedded systems. Unfortunately, it also introduced unusual
14、 complexity which results in many serious issues that cannot be resolved without new more adequate development methods and electronic design automation tools for the system-level design. This paper discusses the problem of an efficient model-based multi-objective optimal architecture synthesis for c
15、omplex hard real-time embedded systems, when using as an example a system-level architecture exploration and synthesis method that we developed.系统构造与架构学学报基于质量驱动模型旳构造分析与实行嵌入式控制/反馈/仿真软件措施Research and development of maximum power transfer tracking system for solar cell unit by matching impedanceRenewab
16、le EnergyEmploying the theorem that matching impedance produces maximum power transfer, the current study develops a low-cost and highly efficient “maximum power point tracker for a solar cell unit,” for the purpose of allowing a solar cell to achieve optimal power transfer under different solar int
17、ensities and temperatures. Circuit control takes a single-chip microprocessor as the core and the booster circuit design undergoes the solar cell charging operation even though the solar cell output voltage is lower than the rated storage battery voltage. Experiments conducted in this study prove th
18、at the tracker this study develops effectively enhances the utilization efficiency of a solar cell. When a solar cell is at an output voltage above 30% of the rated voltage, it can charge a storage battery. When it reaches above 80% of the rated voltage, its power conversion efficiency can reach abo
19、ve 85%. The charge and discharge management mechanism of the device also avoids excessive charge and discharge of the storage battery, and extends storage battery longevity.A review of power converter topologies for wind generators大型/中型/小型风力发电机用逆变器/变频器技术回忆与总结反思Wind energy conversion systems have bec
20、ome a focal point in the research of renewable energy sources. This is in no small part due to the rapid advances in the size of wind generators as well as the development of power electronics and their applicability in wind energy extraction. This paper provides a comprehensive review of past and p
21、resent converter topologies applicable to permanent magnet generators, induction generators, synchronous generators and doubly fed induction generators. The many different generatorconverter combinations are compared on the basis of topology, cost, efficiency, power consumption and control complexit
22、y. The features of each generatorconverter configuration are considered in the context of wind turbine systems.Revival by automation of induction generator for distributed power systems, in Romanian academic research改善型旳自动化导航式分布电力系统发电机 学术研究旳开发阶段The paper approaches the half-century history and the m
23、ain research results of the academic staff and researchers from “Politehnica” University of Timisoara (Universitatea “Politehnica” TimisoaraUPT) and their collaboration with the academic, research and production environment concerning the use of induction machine as power supply in microhydro plants
24、 and windmills in particular; from among these collaborators we mention: The Romanian AcademyTimisoara Branch, The Institute for Automation IPATimisoara Branch, The Research and Modernization Institute for Energetics ICEMENERG Bucharest, The National Institute for Heat Engines INMT Bucharest, The Ma
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- 开关电源 变频器 逆变器 项目 研发 DSP 嵌入式 电力 电子 系统 电力系统 自动化 设计
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