【正文】 學(xué)們，在與他們共同的學(xué)習(xí)、工作、生活過程中，他們給予了我及時(shí)的幫助和建議，開拓了我的思路。最后，向所有幫助過我的人致以最誠(chéng)摯的謝意！ 附 錄英 文 原 文AC/DC Power System Modeling and Analysis For Shipboard ApplicationsAnurag K. Srivastava, Member, IEEE, Jimena L. Bastos, Member, IEEE, Noel N. Schulz, Senior Member, IEEE and Herbert L. Ginn III, Member, IEEEAbstract This presentation will discuss Mississippi State University’s (MSU) efforts over the last five years to develop models and simulations for different applications of shipboard AC/DC power systems. The MSU research team is part of the Electric Ship Research Development and Consortium (ESRDC)and has been involved with research work related to modeling and simulation, protection, reconfiguration, stability, and power electronics of AC/DC shipboard power systems (SPS).I. SPS RESEARCH ACTIVITIES AT MSUTRADITIONALY power system analysis and modeling has focused on applications related to AC terrestrial power systems. Advances in power electronics are providing new opportunities to reevaluate the use of DC distribution systems within both terrestrial and shipboard power systems. The introduction of highervoltage DC transmission lines in shipboard power systems poses new challenges as well as new opportunities for improved control of power.The Mississippi State University (MSU) Department of Electrical and Computer Engineering has participated in the Office of Naval Research’s Electric Ship Research and Development Consortium (ESRDC) for the last five years. The ESRDC consists of seven universities that are pursuing activities related to the next generation allelectric ship. Atypical architecture of an allelectric shipboard power system is shown in figure 1. As shown in figure 1, propellers and service load will be getting energy from integrated power system. Energy storage and power converter will be utilized to provide energy at different frequencies and at different voltages of AC or DC power. Because the new propulsion will contain electric drives, there is a need to investigate sources of electrical energy to provide power around the ship.Advanced motor drives offer an opportunity for tighter control providing additional opportunities to fit this requirement. In addition, shipboard power systems contain awider variety of load types including multiple frequencies, multiple voltage levels and pulsed loads. The ever increasinghighpower loads on ships, which need highly reliable and high quality power, make conventional AC systems very hard to maintain. A DC distribution system may provide an excellent platform for these varied load types [1, 2].Combination of power electronics and conventional AC system may provide an excellent platform for an integrated AC/DC system and opportunity to choose the best from both sides. With this new allelectric ship e new opportunities to investigate the best architectures for allowing optimized,controllable and flexible shipboard power systems. Special power flow analysis tools are needed for an integrated AC/DC unbalanced system [3].Most of the research activities at MSU related to electric ship power system can be categorized as modeling and simulation, protection, reconfiguration, stability, and power electronics issues. MSU’s efforts over the last five year to develop models and simulations for different applications ofshipboard AC/DC power systems will be summarized in this paper.II. SPS MODELING AND SIMULATIONOne of the main research activities at MSU has been modeling and simulation of shipboard power systems .Modeling and simulation is critical in research activities conducted at MSU because the allelectric ship is still not available for researchers to experiment with and because virtual prototyping is the most costeffective solution to design and test plex systems. In modeling and simulationactivities as summarized in figure 2, researchers are developing and testing models in the Virtual Test Bed (VTB),Matlab/Simulink, Real Time Digital Simulator (RTDS), and National Instruments Real Time System [4,5,6].Modeling and simulation of AC/DC power systems for the allelectric ship requires accurate representation of plex electrical and physical phenomena. Devices contained in atypical power system such as transmission lines, generators, motors, nonlinear loads, and power breakers coexist in the same system with power electronic and control systems ,which have different requirements from the simulation point of view. Different simulation platforms provide researcherswith a variety of resources to validate and verify this wide array of models in power systems. Additionally, the realization of realtime simulation and hardwareintheloop testing provide ways to interface real objects with virtual systems, allowing researchers to conduct experiments with part of the real system in a nondestructive and costefficient manner.VTB is the most widely used for electric ship power system applications at MSU as its physics based and provides ease for developing models.The Virtual Test Bed (VTB) is a simulation environment for the design, analysis, and virtual prototyping of largescale multitechnical systems. VTB has different modules as shown in figure 3. VTB enforces natural, signal, and/or data coupling laws between the model interconnection ports. When the simulation of the system is performed, VTB solves the equations governing the models and provides the ability to visualize the outputs of the system in a variety of ways, for example 2D plots and 3D animations. VTB is posed of four major modules: the schematic editor, the solver, the entities, and the visualization engine. The schematic editor provides tools for easily assembling the entities into thesystem model and serves as graphical interface with the user. The solver enforces natural, signal, and/or datacoupling laws between the models ports by using different methods ,including the resistive panion metho