Graeme Vertigan

AC Circuits and Power Systems in Practice (eBook, PDF)

• Format: PDF

Produktbeschreibung

The essential guide that combines power system fundamentals with the practical aspects of equipment design and operation in modern power systems Written by an experienced power engineer, AC Circuits and Power Systems in Practice offers a comprehensive guide that reviews power system fundamentals and network theorems while exploring the practical aspects of equipment design and application. The author covers a wide-range of topics including basic circuit theorems, phasor diagrams, per-unit quantities and symmetrical component theory, as well as active and reactive power and their effects on network stability, voltage support and voltage collapse. Magnetic circuits, reactor and transformer design are analyzed, as is the operation of step voltage regulators. In addition, detailed introductions are provided to earthing systems in LV and MV networks, the adverse effects of harmonics on power equipment and power system protection. Finally, European and American engineering standards are presented where appropriate throughout the text, to familiarize the reader with their use and application. This book is written as a practical power engineering text for engineering students and recent graduates. It contains more than 400 illustrations and is designed to provide the reader with a broad introduction to the subject and to facilitate further study. Many of the examples included come from industry and are not normally covered in undergraduate syllabi. They are provided to assist in bridging the gap between tertiary study and industrial practice, and to assist the professional development of recent graduates. The material presented is easy to follow and includes both mathematical and visual representations using phasor diagrams. Problems included at the end of most chapters are designed to walk the reader through practical applications of the associated theory.

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Produktdetails

• Verlag: Wiley
• Seitenzahl: 592
• Erscheinungstermin: 28. September 2017
• Englisch
• ISBN-13: 9781118924600
• Artikelnr.: 49375671

Autorenporträt

GRAEME VERTIGAN is a consulting engineer working in the Australian power supply industry. He has delivered courses on Energy Metering for the national electricity market operator since 2009, and was formerly the senior electrical engineer at a large Tasmanian zinc refinery. He was also employed as a part time lecturer at the University of Tasmania for many years.

Inhaltsangabe

Preface xiii

Acknowledgements xvii

Part I 1

1 Power Systems: A General Overview 3

1.1 Three-phase System of AC Voltages 3

1.2 Low Voltage Distribution 6

1.3 Examples of Distribution Transformers 8

1.4 Practical Magnitude Limits for LV Loads 10

1.5 Medium Voltage Network 11

1.6 Transmission and Sub-Transmission Networks 24

1.7 Generation of Electrical Energy 32

1.8 Sources 41

Further Reading 41

2 Review of AC Circuit Theory and Application of Phasor Diagrams 43

2.1 Representation of AC Voltages and Currents 43

2.2 RMS Measurement of Time Varying AC Quantities 44

2.3 Phasor Notation (Phasor Diagram Analysis) 45

2.4 Passive Circuit Components: Resistors, Capacitors and Inductors 49

2.5 Review of Sign Conventions and Network Theorems 55

2.6 AC Circuit Analysis Examples 61

2.7 Resonance in AC Circuits 74

2.8 Problems 83

2.9 Practical Experiment 88

3 Active Power, Reactive Power and Power Factor 91

3.1 Single-Phase AC Power 91

3.2 Active Power 92

3.3 Reactive Power 93

3.4 Apparent Power or the volt-amp Product, S 96

3.5 Three-Phase Power 97

3.6 Power Factor 99

3.7 Power Factor Correction 100

3.8 Typical Industrial Load Profiles 105

3.9 Directional Power Flows 107

3.10 Energy Retailing 110

3.11 Problems 111

4 Magnetic Circuits, Inductors and Transformers 115

4.1 Magnetic Circuits 115

4.2 Magnetic Circuit Model 116

4.3 Gapped Cores and Effective Permeability 119

4.4 Inductance Calculations 120

4.5 Core Materials 121

4.6 Magnetising Characteristics of GOSS 122

4.7 Energy Stored in the Air Gap 125

4.8 EMF Equation 126

4.9 Magnetic Circuit Topologies 127

4.10 Magnetising Losses 129

4.11 Two- Winding Transformer Operation 131

4.12 Transformer VA Ratings and Efficiency 133

4.13 Two-Winding Transformer Equivalent Circuit 134

4.14 Per-Unit System 137

4.15 Transformer Short-Circuit and Open-Circuit Tests 138

4.16 Transformer Phasor Diagram 140

4.17 Current Transformers 142

4.18 Sources 144

4.19 Problems 144

5 Symmetrical Components 155

5.1 Symmetrical Component Theory 156

5.2 Sequence Networks and Fault Analysis 160

5.3 Network Fault Connections 163

5.4 Measurement of Zero-sequence Components (Residual Current and Voltage) 170

5.5 Phase-to-Ground Fault Currents Reflected from Star to Delta 171

5.6 Sequence Components Remote from a Fault 173

5.7 Problems 175

5.7 Sources 185

6 Power Flows in AC Networks 187

6.1 Power Flow Directions 188

6.2 Synchronous Condenser 188

6.3 Synchronous Motor 191

6.4 Generalised Power Flow Analysis 192

6.5 Low X/R Networks 197

6.6 Steady State Transmission Stability Limit 201

6.7 Voltage Collapse in Power Systems 202

6.8 Sources 207

6.9 Problems 207

Part II 211

7 Three-Phase Transformers 213

7.1 Positive and Negative Sequence Impedance 213

7.2 Transformer Zero-Sequence Impedance 219

7.3 Transformer Vector Groups 221

7.4 Transformer Voltage Regulation 222

7.5 Magnetising Current Harmonics 228

7.6 Tap-changing Techniques 233

7.7 Parallel Connection of Transformers 243
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Rezensionen

This book combines the author?s rich experience in industry and teaching expertise in university. It covers the fundamental topics of AC circuits, and the application of those theories are discussed with numerous examples as well as the requirements of Engineering Standards. The writing style is logical and explicit, while illustrations and diagrams are with great accuracy, facilitating readers to have a systematic and in-depth understanding. Overall, I think this book can be an invaluable guide for recent graduate engineers working in power industry. -- Adrian Chen, Electrical Engineer, Moolarben Coal Operations Pty Ltd, Australia

This is a refreshingly practical text which covers a wide range of topics relating to AC power systems. The book is divided into two parts with part one providing a broad overview of AC power systems and a review of fundamental AC circuit theory. Part two of the book covers specific areas of AC power systems in more detail with chapters on three phase transformers, voltage and current measurement, energy metering, harmonics and power system protection. One standout feature of this book is the writing style which I found to be very straight forward and easy to read. Additionally, excellent diagrams and illustrations work well to reinforce the subject material. The text is very well referenced with a list of sources provided at the conclusion of each chapter. The industry based examples in the text work well to link electrical engineering theory and practice and as such this book should find appeal with both undergraduate students studying a course of electrical engineering and recent graduates. - James Lamont, Electrical Engineering Technical Officer, Deakin University, Australia

The genius of the text is that it presents sound theoretical concepts in a practical, easy to apply manner. The use of phasor diagrams and illustrated examples makes the application to real world problems easier, and gives the practitioner a ?feel? for the solution ? a valuable and necessary outcome in situations where not all the information is easily available and decisions must still be made. - David Gaskell, Nyrstar Hobart Smelter, Australia