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Harmonic Modeling of Voltage Source Converters using Simple Numerical Methods de RKL Lian

Harmonic Modeling of Voltage Source Converters using Simple Numerical Methods: IEEE Press

Autor RKL Lian
en Limba Engleză Hardback – dec 2021
Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods One of the first books to bridge the gap between frequency domain and time-domain methods of steady-state modeling of power electronic converters
Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods presents detailed coverage of steady-state modeling of power electronic devices (PEDs). This authoritative resource describes both large-signal and small-signal modeling of power converters and how some of the simple and commonly used numerical methods can be applied for harmonic analysis and modeling of power converter systems. The book covers a variety of power converters including DC-DC converters, diode bridge rectifiers (AC-DC), and voltage source converters (DC-AC).
The authors provide in-depth guidance on modeling and simulating power converter systems. Detailed chapters contain relevant theory, practical examples, clear illustrations, sample Python and MATLAB codes, and validation enabling readers to build their own harmonic models for various PEDs and integrate them with existing power flow programs such as OpenDss.
This book:
  • Presents comprehensive large-signal and small-signal harmonic modeling of voltage source converters with various topologies
  • Describes how to use accurate steady-state models of PEDs to predict how device harmonics will interact with the rest of the power system
  • Explains the definitions of harmonics, power quality indices, and steady-state analysis of power systems
  • Covers generalized steady-state modeling techniques, and accelerated methods for closed-loop converters
  • Shows how the presented models can be combined with neural networks for power system parameter estimations
Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods is an indispensable reference and guide for researchers and graduate students involved in power quality and harmonic analysis, power engineers working in the field of harmonic power flow, developers of power simulation software, and academics and power industry professionals wanting to learn about harmonic modeling on power converters.
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Specificații

ISBN-13: 9781119527138
ISBN-10: 1119527139
Pagini: 416
Dimensiuni: 178 x 260 x 27 mm
Greutate: 0.93 kg
Editura: Wiley
Seria IEEE Press

Locul publicării:Chichester, United Kingdom

Cuprins

Preface xiii Acknowledgments xvii List of Symbols xix 1 Fundamental Theory 1 1.1 Background 1 1.2 Definition of Harmonics 2 1.3 Fourier Series 2 1.3.1 Trigonometric Form 3 1.3.2 Phasor Form 4 1.3.3 Exponential Form 4 1.4 Waveform Symmetry 5 1.4.1 Even Symmetry 5 1.4.2 Odd Symmetry 6 1.4.3 Half-Wave Symmetry 6 1.5 Phase Sequence of Harmonics 8 1.6 Frequency Domain and Harmonic Domain 8 1.7 Power Definitions 9 1.7.1 Average Power 9 1.7.2 Apparent and Reactive Power 9 1.8 Harmonic Indices 11 1.8.1 Total Harmonic Distortion (THD) 11 1.8.2 Total Demand Distortion (TDD) 12 1.8.3 True Power Factor 12 1.9 Detrimental Effects of Harmonics 13 1.9.1 Resonance 13 1.9.2 Misoperations of Meters and Relays 17 1.9.3 Harmonics Impact on Motors 18 1.9.4 Harmonics Impact on Transformers 18 1.10 Characteristic Harmonic and Non-Characteristic Harmonic 19 1.11 Harmonic Current Injection Method 21 1.12 Steady-State vs. Transient Response 21 1.13 Steady-State Modeling 22 1.14 Large-Signal Modeling vs. Small-Signal Modeling 24 1.15 Discussion of IEEE Standard (STD) 519 25 1.16 Supraharmonics 30 2 Power Electronics Basics 37 2.1 Some Basics 37 2.2 Semiconductors vs. Wide Bandgap Semiconductors 38 2.3 Types of Static Switches 40 2.3.1 Uncontrolled Static Switch 40 2.3.2 Semi-Controllable Switches 41 2.3.3 Controlled Switch 42 2.4 Combination of Switches 44 2.5 Classification Based on Commutation Process 45 2.6 Voltage Source Converter vs. Current Source Converter 46 3 Basic Numerical Iterative Methods 49 3.1 Definition of Error 49 3.2 The Gauss-Seidel Method 50 3.3 Predictor-Corrector 52 3.4 Newton's Method 55 3.4.1 Root Finding 55 3.4.2 Numerical Integration 56 3.4.3 Power Flow 57 3.4.4 Harmonic Power Flow 61 3.4.5 Shooting Method 63 3.4.6 Advantages of Newton's Method 67 3.4.7 Quasi-Newton Method 69 3.4.8 Limitation of Newton's Method 71 3.5 PSO 71 4 Matrix Exponential 73 4.1 Definition of Matrix Exponential 74 4.2 Evaluation of Matrix Exponential 75 4.2.1 Inverse Laplace Transform 75 4.2.2 Cayley-Hamilton Method 76 4.2.3 Padé Approximation 78 4.2.4 Scaling and Squaring 80 4.3 Krylov Subspace Method 80 4.4 Krylov Space Method with Restarting 83 4.5 Application of Augmented Matrix on DC-DC Converters 86 4.6 Runge-Kutta Methods 90 5 Modeling of Voltage Source Converters 95 5.1 Single-Phase Two-Level VSCs 95 5.1.1 Switching Functions 95 5.1.2 Switched Circuits 97 5.2 Three-Phase Two-Level VSCs 99 5.3 Three-Phase Multilevel Voltage Source Converter 112 5.3.1 Multilevel PWM 112 5.3.2 Diode Clamped Multilevel VSCs 114 5.3.3 Flying Capacitor Multilevel VSCs 120 5.3.4 Cascaded Multi-Level VSCs 128 5.3.5 Modular Multi-Level VSC 140 6 Frequency Coupling Matrices 149 6.1 Construction of FCM in the Harmonic Domain 149 6.2 Construction of FCM in the Time Domain 155 7 General Control Approaches of a VSC 179 7.1 Reference Frame 179 7.1.1 Stationary-abc Frame 179 7.1.2 Stationary-alpha-beta Frame 180 7.1.3 Synchronous-dq Frame 181 7.1.4 Phase-Locked Loop 182 7.2 Control Strategies 183 7.2.1 Vector-Current Controller 183 7.2.2 Direct Power Controller 186 7.2.3 DC-bus Voltage Controller 188 7.2.4 Circulating Current Controller 189 8 Generalized Steady-State Solution Procedure for Closed-Loop Converter Systems 193 8.1 Introduction 193 8.2 Generalized Procedure 193 8.2.1 Step 1: Determine How and Where to Break the Loop 195 8.2.2 Step 2: Check if the Calculation Flows of the Broken System are Feasible 195 8.2.3 Step 3: Determine What Domain of Each Component in the System Should be Modeled 196 8.2.4 Step 4: Formulate the Mismatch Equations 197 8.2.5 Step 5: Iterate to Find the Solution 197 8.3 Previously Proposed Methods Derived from the Proposed Solution Procedures 197 8.3.1 Steady-State Methods Derived from Loop-Breaking 1 Method 197 8.3.2 Steady-State Methods Derived from Loop-Breaking 2 Method 198 8.4 The Loop-Breaking 3 Method 200 9 Loop-Breaking 1 Method 205 9.1 A Typical Two-Level VSC with AC Current Control and DC Voltage Control 205 9.2 Loop-Breaking 1 Method for a Two-Level VSC 206 9.2.1 Block 1 208 9.2.2 Current Controller Block 208 9.2.3 Voltage Controller Block 210 9.3 Solution Flow Diagram 210 9.3.1 Initialization 212 9.3.2 Jacobian Matrix 212 9.3.3 Number of Modulating Voltage Harmonics to be Included 228 10 Loop-Breaking 2 Method for Solving a VSC 245 10.1 Modeling for a Closed-Loop DC-DC Converter 245 10.1.1 Model of the Buck Converter 245 10.1.2 Constraints of Steady-State 247 10.1.3 Switching Time Constraints 248 10.1.4 Solution Flow Diagram 248 10.2 Two-Level VSC Modeling: Open-Loop Equations 252 10.2.1 Steady-State Constraints 256 10.2.2 Switching Time Constraints 257 10.2.3 Solution Flow Diagram 260 10.2.4 Initialization 260 10.2.5 Jacobian Matrix 260 10.2.6 Discussions of Results 269 10.3 Comparison Between the LB 1 and LB 2 Methods 270 10.3.1 Case #1: Balanced System 270 10.3.2 Case #2: Unbalanced System with AC Waveform Exhibiting Half-Wave Symmetry 270 10.3.3 Case #3: Unbalanced System, No Waveform Symmetry 272 10.4 Large-Signal Modeling for Line-Commutated Power Converter 272 10.4.1 Discontinuous Conduction Mode 273 10.4.2 Continuous Conduction Mode 282 10.4.3 Steady-State Constraint Equations 284 10.4.4 General Comments 291 11 Loop-Breaking 3 Method 293 11.1 OpenDSS 293 11.2 Interfacing OpenDSS with MATLAB 294 11.3 Interfacing OpenDSS with Harmonic Models of VSCs 299 12 Small-Signal Harmonic Model of a VSC 315 12.1 Problem Statement 315 12.2 Gauss-Seidel LB 3 and Newton LB 3 316 12.2.1 Current Injection Method 316 12.2.2 Norton Circuit Method 317 12.3 Small-Signal Analysis of DC-DC Converter 320 12.4 Small-Signal Analysis of a Two-Level VSC 325 12.4.1 Approach from Section 12.3 325 12.4.2 Simpler Approach 326 13 Parameter Estimation for a Single VSC 335 13.1 Background on Parameter Estimation 335 13.2 Parameter Estimator Based on White-Box-and-Black-Box Models 337 13.3 Estimation Validations 339 13.3.1 Experimental Validation 340 13.3.2 PSCAD/EMTDC Validation 343 14 Parameter Estimation for Multiple VSCs with Domain Adaptation 349 14.1 Introduction of Deep Learning 349 14.2 Domain Adaptation 351 14.3 Parameter Estimation for Multiple VSCs 352 14.4 Notations for DA 353 14.5 Supervised Domain Adaptation for Regression 355 14.6 Supervised Domain Adaptation for Classification 356 14.7 Test Setup 358 14.7.1 Data Generator 359 14.7.2 Data Preprocessing 359 14.8 Performance Metrics 361 14.8.1 R square (Regression) 361 14.8.2 Mean Absolute Percentage Error, MAPE (Regression) 361 14.8.3 Accuracy (Classification) 362 14.8.4 F1 score (Classification) 362 14.9 Test Results 363 14.9.1 Classification Task on Multiple VSC 363 14.9.2 Regression Task on Multiple VSC 363 14.10 Software for Running the Codes 370 14.11 Implementation of Domain Adaptation 370 14.11.1 Data Generation 370 14.11.2 Regression 372 14.11.3 Classification network 375 References 379 Index 389

Notă biografică

Ryan Kuo-Lung Lian, Professor, Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan. He has been working in power system modeling for more than 10 years. His research interests are in power quality analysis, energy management systems, renewable energy systems, real time simulation, and power electronic control systems. Dr. Lian received his Ph.D. degree in Electrical Engineering from the University of Toronto, Canada, and he is a Senior Member of the Institute of Electrical and Electronics Engineers (IEEE). Ramadhani Kurniawan Subroto, Postdoctoral Researcher, Department of Electrical Engineering, Technical University of Denmark, Denmark. Dr. Subroto received his Ph.D. degree in Electrical Engineering from National Taiwan University of Science and Technology, Taiwan in 2021. His research interests include power converter control, power system control, energy storage control, model predictive control, sliding mode control, and harmonics modeling of power converter. Victor Andrean, received his M.Sc. degree from the Department of Electrical Engineering at National Taiwan University of Science and Technology, Taipei City, Taiwan, in 2019. Victor is currently working as a data scientist for HedgeDesk, CA, USA. Bing Hao Lin, Associate Researcher, Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan. He received his B.Sc. and M.Sc. degrees in Electrical Engineering from the National Taiwan University of Science and Technology in 2018 and 2020, respectively.