Florida International University FIU Digital Commons FIU Electronic Theses and Dissertations University Graduate School 3-7-2014 Physics-Based Modeling of Power System Components for the Evaluation of Low-Frequency Radiated Electromagnetic Fields Mohammadreza Barzegaran Florida International University, [email protected] Follow this and additional works at: http://digitalcommons.fiu.edu/etd Part of the Power and Energy Commons Recommended Citation Barzegaran, Mohammadreza, "Physics-Based Modeling of Power System Components for the Evaluation of Low-Frequency Radiated Electromagnetic Fields" (2014). FIU Electronic Theses and Dissertations. Paper 1239. http://digitalcommons.fiu.edu/etd/1239 This work is brought to you for free and open access by the University Graduate School at FIU Digital Commons. It has been accepted for inclusion in FIU Electronic Theses and Dissertations by an authorized administrator of FIU Digital Commons. For more information, please contact [email protected]. FLORIDA INTERNATIONAL UNIVERSITY Miami, Florida PHYSICS-BASED MODELING OF POWER SYSTEM COMPONENTS FOR THE EVALUATION OF LOW-FREQUENCY RADIATED ELECTROMAGNETIC FIELDS A dissertation submitted in partial fulfillment of the requirement for the degree of DOCTOR OF PHILOSOPHY in ELECTRICAL ENGINEERING By Mohammadreza Barzegaranbaboli 2014 To: Dean Amir Mirmiran College of Engineering and Computing This dissertation, written by Mohammadreza Barzegaranbaboli, and entitled Physics- Based Modeling of Power System Components for The Evaluation of Low-Frequency Radiated Electromagnetic Fields, having been approved in respect to style and intellectual contents, is referred to you for judgment. We have read this dissertation and recommend that it be approved. Ibrahim Tansel Jean Andrian Sakhrat Khizroev Nezih Pala Osama A. Mohammed, Major Professor Date of Defense: March 07, 2014 The dissertation of Mohammadreza Barzegaranbaboli is approved. Dean Amir Mirmiran College of Engineering and Computing Dean Lakshmi N. Reddi University Graduate School Florida International University, 2014 ii © Copyright 2014 by Mohammadreza Barzegaranbaboli All rights reserved. iii DEDICATION This dissertation is dedicated to my compassionate, supportive, intelligent, and patient wife, Parvin Rafiee, and to my always ever faithful parents, Masoumeh Mirbozorgi and Alireza Barzegaran, who brought me up with their love and encouraged me to pursue advanced degrees. iv ACKNOWLEDGMENTS I owe several years of my research life to my advisor Professor Osama A. Mohammed for his willingness to accept me in his laboratory and for providing me with a great research motivations, and research facilities. Hence, I wish to express in words my deepest gratitude to my adviser, Professor Osama Mohammed, for his guidance, encouragement, and support during my graduate study. His creative thinking, knowledge and expertise on computational electromagnetic were indeed the fuse of my propulsion motor in conducting this research. I would like to thank my dissertation committee members Professor Sakhrat Khirzroev, Professor Ibrahim Tansel, Professor Jean Andrian, and Dr. Nezih Pala for their insightful comments and constructive suggestions in the review of my research proposal and dissertation. I would like to acknowledge the partial research support provided from the office of Naval Research and the US department of Energy throughout my years of research in Energy Systems Laboratory. I also acknowledge the doctoral DEA fellowship from FIU graduate school during the summer semester of 2013 of my studies at Florida International University. Although this doctoral dissertation is considered to be my personal accomplishment; I would like to acknowledge my colleagues in Energy Systems Research Laboratory for their creative support, encouragement, and collaborations during my graduate studies. I also appreciate the trust and support of the ECE Department staff; Ms. Pat Brammer, Ms. Ana Saenz, and Mr. Oscar Silveria during my studies in department of electrical and computer engineering. v ABSTRACT OF THE DISSERTATION PHYSICS-BASED MODELING OF POWER SYSTEM COMPONENTS FOR THE EVALUATION OF LOW-FREQUENCY RADIATED ELECTROMAGNETIC FIELDS by Mohammadreza Barzegaranbaboli Florida International University, 2014 Miami, Florida, USA Professor Osama A. Mohammed, Major Professor The low-frequency electromagnetic compatibility (EMC) is an increasingly important aspect in the design of practical systems to ensure the functional safety and reliability of complex products. The opportunities for using numerical techniques to predict and analyze system’s EMC are therefore of considerable interest in many industries. As the first phase of study, a proper model, including all the details of the component, was required. Therefore, the advances in EMC modeling were studied with classifying analytical and numerical models. The selected model was finite element (FE) modeling, coupled with the distributed network method, to generate the model of the converter’s components and obtain the frequency behavioral model of the converter. The method has the ability to reveal the behavior of parasitic elements and higher resonances, which have critical impacts in studying EMI problems. For the EMC and signature studies of the machine drives, the equivalent source modeling was studied. Considering the details of the multi-machine environment, including actual models, some innovation in equivalent source modeling was performed vi to decrease the simulation time dramatically. Several models were designed in this study and the voltage current cube model and wire model have the best result. The GA-based PSO method is used as the optimization process. Superposition and suppression of the fields in coupling the components were also studied and verified. The simulation time of the equivalent model is 80-100 times lower than the detailed model. All tests were verified experimentally. For the EMC study of the switching activities, 3DFE modeling of a typical power electronic drive was implemented with an innovation in defining switching activities. The measurement was also applied for verification of the numerical results, and for investigating the stray fields under different operating conditions. As the application of EMC and signature study, the fault diagnosis and condition monitoring of an induction motor drive was developed using radiated fields. In addition to experimental tests, the 3DFE analysis was coupled with circuit-based software to implement the incipient fault cases. The identification was implemented using ANN for seventy various faulty cases. The simulation results were verified experimentally. Finally, the identification of the types of power components were implemented. More than 170 circumstances of the combinations of the typical power components were tested experimentally and the identification is explained. The results show that it is possible to identify the type of components, as well as the faulty components, by comparing the amplitudes of their stray field harmonics. The identification using the stray fields is nondestructive and can be used for the setups that cannot go offline and be dismantled. vii TABLE OF CONTENTS 1. Introduction .................................................................................................................... 1 1.1 INTRODUCTION TO ELECTROMAGNETIC COMPATIBILITY ......................................... 2 1.2 THE SOURCES OF ELECTROMAGNETIC INTERFERENCE ............................................ 5 1.3 ELECTROMAGNETIC COMPATIBILITY AND POWER SMART GRID ............................. 9 1.4 LITERATURE REVIEW ............................................................................................. 12 1.4.1 EMC Studies In Power System ............................................................................. 13 1.4.2 Electromagnetic Computational Modeling Studies .............................................. 25 1.4.3 Electromagnetic Signature Studies ....................................................................... 26 1.5 PROBLEM STATEMENT ........................................................................................... 29 1.6 RESEARCH OBJECTIVE ........................................................................................... 30 1.7 ORIGINAL CONTRIBUTION AND SIGNIFICANCE ...................................................... 33 1.8 ORGANIZATION OF THE DISSERTATION ................................................................. 36 2. Advanced Modeling in Computational Electromagnetic Compatibility ................... 38 2.1 OVERVIEW ............................................................................................................. 38 2.2 EMC COMPUTATIONAL MODELS AND SOLUTION METHODS ................................. 41 2.3 CLASSIFICATION OF EMC MODELS ....................................................................... 43 2.4 TIME DOMAIN VS. FREQUENCY DOMAIN MODELING .............................................. 46 2.5 ANALYTICAL OR NUMERICAL METHOD ................................................................. 48 2.6 OVERVIEW OF NUMERICAL METHODS ................................................................... 51 2.6.1 Modeling of Problems via the BEM and MoM .................................................... 52 2.6.2 Modeling of problems via the domain methods: FDM and FEM ......................... 52 3. 3-D Finite Element Method Coupled with Transmission-Line Modeling in Emc Study 55 3.1. OVERVIEW ............................................................................................................