Modeling and analysis of a dc power distribution system in 2

A DC power distribution system (PDS) of a transport aircraft was modeled and analyzed using MATLAB/Simulink software. The multi-level modeling concept was used as a modeling approach, which assumes modeling subsystem of the PDS at three different levels of

MODELING AND ANALYSIS OF A DC POWER DISTRIBUTION SYSTEM IN 21ST CENTURY AIRLIFTERSby Konstantin P. LouganskiThesis submitted to the faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree ofMaster of Science in Electrical EngineeringDr. Dusan Borojevic, Chairman Dr. Fred C. Lee Dr. Douglas K. LindnerSeptember 30, 1999 Blacksburg, VirginiaKeywords: power distribution system, multi-level modeling, simulation, small-signal analysis, stability, regenerative energy, three-phase system, starter/generator, power converter, actuator, constant power load1

A DC power distribution system (PDS) of a transport aircraft was modeled and analyzed using MATLAB/Simulink software. The multi-level modeling concept was used as a modeling approach, which assumes modeling subsystem of the PDS at three different levels of

MODELING AND ANALYSIS OF A DC POWER DISTRIBUTION SYSTEMIN 21ST CENTURY AIRLIFTERSKonstantin P. LouganskiAbstractA DC power distribution system (PDS) of a transport aircraft was modeled and analyzed using MATLAB/Simulink software. The multi-level modeling concept was used as a modeling approach, which assumes modeling subsystem of the PDS at three different levels of complexity. The subsystem models were implemented in Simulink and combined into the whole PDS model according to certain interconnection rules. Effective modeling of different scenarios of operation was achieved by mixing subsystem models of different levels in one PDS model. Linearized models were obtained from the nonlinear PDS model for stability analysis and control design. The PDS model was used to examine the system stability and the DC bus power quality under bidirectional power flow conditions. Small-signal analysis techniques were employed to study stability issues resulting from subsystem interactions. The DC bus stability diagram was proposed for predicting stability of the PDS with different types of loads without performing an actual stability test based on regular stability analysis tools. Certain PDS configurations and operational scenarios leading to instability were identified. An analysis of energy transfer in the PDS showed that a large energy storage capacitor in the input filter of a flight control actuator is effective for reduction of the DC bus voltage disturbances produced by regenerative action of the actuator. However, energy storage capacitors do not provide energy savings in the PDS and do not increase its overall efficiency.2

A DC power distribution system (PDS) of a transport aircraft was modeled and analyzed using MATLAB/Simulink software. The multi-level modeling concept was used as a modeling approach, which assumes modeling subsystem of the PDS at three different levels of

AcknowledgmentsI would like to thank Dr. Dusan Borojevic for being my advisor and giving me an opportunity to pursue graduate study at Virginia Power Electronics Center (VPEC), presently the Center for Power Electronics Systems (CPES). I appreciate his broad views and enthusiasm in developing this subject, his encouragement and support, and his taking time to guide me through this work. I would like to thank Dr. Fred C. Lee, director of CPES, for serving as my committee member and for putting so much energy into making CPES one of the best power electronics centers for research and education. It was my pleasure and honor to study and work there. I would like to thank Dr. Douglas K. Lindner, the major investigator in this sponsored research, for reviewing this thesis and serving as my committee member. His valuable comments and attention to details helped me make this work better. My special thanks to Mr. Sriram Chandrasekaran, who was always available to provide any help and to share his expertise. I would like to recognize a contribution of Mr. George Korba and Ms. Catherine Frederick from Lockheed Martin Control Systems in Johnson City, New York, who provided actuator models for use in this research. Finally, I give thanks to all my friends and family for their encouragement and support during this period of my life. This work was supported by the Air Force Office of Scientific Research under Grant Number F49620-97-1-0254.iii

A DC power distribution system (PDS) of a transport aircraft was modeled and analyzed using MATLAB/Simulink software. The multi-level modeling concept was used as a modeling approach, which assumes modeling subsystem of the PDS at three different levels of

Contents1. INTRODUCTION ................................................................................................................................................ 1 2. PRINCIPLES AND TECHNIQUES OF MODELING AND ANALYSIS OF A DC POWER DISTRIBUTION SYSTEM.................................................................................................................................. 9 2.1 MULTI-LEVEL MODELING OF POWER DISTRIBUTION SYSTEM COMPONENTS ................................................... 9 2.2 POWER DISTRIBUTION SYSTEM ANALYSIS AND SIMULATION TOOLS ............................................................. 12 3. MODEL DEVELOPMENT FOR POWER DISTRIBUTION SYSTEM COMPONENTS......................... 16 3.1 MODELING OF SUBSYSTEM ELEMENTS ........................................................................................................... 16 3.2 MODELING OF DC-DC SWITCHING POWER CONVERTERS .............................................................................. 23 3.2.1 DC-DC Buck Converter Modeling........................................................................................................ 23 3.2.2 DC-DC Boost Converter Modeling …… 此处隐藏：39571字，全部文档内容请下载后查看。喜欢就下载吧 ……