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E-raamat: Introduction to Wavelet Modulated Inverters

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AN INTRODUCTION TO Wavelet Modulated Inverters An authoritative guide to designing and constructing wavelet functions that accurately model complex circuits for better performance

This is the first book to provide details, analysis, development, implementation, and performances of wavelet modulated (WM) inverters, a novel technique that keeps power systems stable and minimizes energy waste while enhancing power quality and efficiency. Written by experts in the power electronics field, it provides step-by-step procedures to implement the WM technique for single- and three-phase inverters. Also presented are key sample performance results for the new WM power inverters for different load types, which demonstrate the inverters simplicity, efficacy, and robustness.



Beginning with the fundamentals of inverter technology, the book then describes wavelet basis functions and sampling theory with particular reference to the switching model of inverters. From there, comprehensive chapters explain:





The connection between the non-uniform sampling theorem and wavelet functions to develop an ideal sampling-reconstruction process to operate an inverter The development of scale-based linearly combined basis functions in order to successfully operate single-phase WM inverters Performances of single-phase WM inverters for static, dynamic, and non-linear loads The simulation and experimental performances of three-phase wavelet modulated voltage source inverters for different loads at various operating conditions

The book establishes, for the first time, a direct utilization of different concepts of the sampling theorem and signal processing in accurate modeling of the operation of single- and three-phase inverters. Figures are provided to help develop the basis of utilizing concepts of the sampling, signal processing, and wavelet theories in developing a new tool and technology for inverters. Also included are easy-to-follow mathematical derivations, as well as procedures and flowcharts to facilitate the implementation of the WM inverters. These items make this unique reference of great interest to academic researchers, industry-based researchers, and practicing engineers. It is ideally suited for senior undergraduate and graduate-level students in electrical engineering, computer engineering, applied signal processing, and power electronics courses.

Arvustused

Preface ix
List of Symbols
xi
List of Abbreviations
xv
1 Introduction to Power Inverters
1(18)
1.1 Fundamental Inverter Topologies
1(5)
1.1.1 Single-Phase (1ø) Inverters
2(2)
1.1.2 Three-Phase (3ø) Inverters
4(2)
1.2 Multilevel Inverter Topologies
6(5)
1.2.1 Neutral-Point Clamped Multilevel Inverter
7(1)
1.2.2 Diode-Clamped Multilevel Inverter
8(1)
1.2.3 Capacitor-Clamped Multilevel Inverter
8(1)
1.2.4 Cascaded H-Bridge Multilevel Inverter
9(2)
1.3 Fundamental Inverter Switching
11(4)
1.4 Harmonic Distortion
15(2)
1.5 Summary
17(2)
2 Wavelets and the Sampling Theorem
19(22)
2.1 Introduction
19(2)
2.2 Wavelet Basis Functions
21(8)
2.2.1 Orthogonal Wavelet Basis Functions
23(2)
2.2.2 Semi-Orthogonal Wavelet Basis Functions
25(2)
2.2.3 Bi-Orthogonal Wavelet Basis Functions
27(1)
2.2.4 Shift-Orthogonal Wavelet Basis Functions
28(1)
2.3 Sampling Process as a Multiresolution Analysis (MRA)
29(4)
2.4 Sampling Forms
33(4)
2.4.1 Uniform Sampling
33(2)
2.4.2 Nonuniform Sampling
35(1)
2.4.3 Nonuniform Recurrent Sampling
36(1)
2.5 Wavelet Sampling Theory
37(2)
2.6 Summary
39(2)
3 Modeling of Power Inverters
41(24)
3.1 Introduction
41(2)
3.2 Sampling-Based Modeling of Single-Phase Inverters
43(8)
3.2.1 Nonuniform Sampling-Based Representation
44(2)
3.2.2 Reconstructing the Reference-Modulating Signal from Nonuniform Samples
46(5)
3.3 Testing the Nonuniform Recurrent Sampling-Based Model of Inverters
51(2)
3.3.1 PWM Inverter Output Voltage for Two Carrier Frequencies
52(1)
3.4 Sampling-Based Modeling of Three-Phase Inverters
53(9)
3.5 Summary
62(3)
4 Scale-Based Linearly Combined Wavelets
65(20)
4.1 Introduction
65(1)
4.2 Scale-Based Linearly Combined Wavelet Basis Functions
66(10)
4.2.1 Balancing the Order of the Scale-Based Linearly Combined Scaling Function φ(t)
70(2)
4.2.2 Scale-Based Linearly Combined Wavelet Function ψ φ(t)
72(2)
4.2.3 Construction of Scale-Based Linearly Combined Synthesis Scaling Functions Φ(t)
74(2)
4.3 Nondyadic MRA Structure
76(3)
4.3.1 MRA for Nonuniform Recurrent Sampling
76(3)
4.4 Scale-Based Linearly Combined Scaling Functions for Three-Phase Inverters
79(4)
4.5 Summary
83(2)
5 Single-Phase Wavelet Modulated Inverters
85(22)
5.1 Introduction
85(1)
5.2 Implementing the Wavelet Modulation Technique
85(3)
5.3 Simulated Performance of a Wavelet Modulated Inverter
88(7)
5.4 Experimental Performance of a Wavelet Modulated Inverter
95(6)
5.5 The Scale-Time Interval Factor γ
101(5)
5.6 Summary
106(1)
6 Three-Phase Wavelet Modulated Inverters
107(24)
6.1 Introduction
107(1)
6.2 Implementing the Wavelet Modulation Technique for a Three-Phase Inverter
108(3)
6.3 Simulated Performance of a Three-Phase Wavelet Modulated Inverter
111(8)
6.4 Experimental Performance of a Three-Phase Wavelet Modulated Inverter
119(8)
6.5 Summary
127(4)
Appendix A Nondyadic MRA for 3ø WM Inverters
131(4)
A.1 Preliminary Derivations
131(1)
A.2 Time and Scale Localization of MRA Spaces
132(3)
Bibliography 135(8)
Index 143
S. A. SALEH, PHD, IEEE Member, is a faculty member at the School of Ocean Technology, Marine Institute, Memorial University of Newfoundland, Canada. He has published more than ten IEEE Transactions and holds two patents. Dr. Salehs research interests include wavelets, wavelet transforms, power system protection and control, power electronic converters, modulation techniques, digital signal processing and its applications in power systems, and power electronics.

M. AZIZUR RAHMAN, PHD, IEEE Life Fellow, is Professor and University Research Professor at Memorial University of Newfoundland, Canada. He has forty-eight years of teaching experience. Rahman has published more than 650 papers and holds eleven patents. He is the recipient of numerous awards.