Polypropylene Cable Insulation - Boxue Du

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Résumé :

About the Author xi

Preface xiii

Acknowledgements xv

1 Introduction 1

1.1 Background 1

1.2 State of the Art of PP Modification Method 6

1.2.1 Nanocomposites 6

1.2.2 Polymer Blending 9

1.2.3 Chemical Copolymerization and Grafting 10

1.2.4 Crystallization Regulation 11

1.3 Effect of Microstructures on Dielectric Properties 13

1.3.1 Effect of Molecular Chain Structures 13

1.3.2 Effect of Aggregate Structures 15

1.4 Effect of Operating Conditions on Dielectric Properties 17

1.4.1 Effect of Aging Treatment 17

1.4.2 Effect of Thermal Stress 18

1.4.3 Effect of Voltage Stress 18

1.5 Content of This Book 19

References 21

Part I Polypropylene Insulation for HVDC Cables 29

2 Space Charge and Dielectric Breakdown 31

2.1 Introduction 31

2.2 Effect of Elastomer on Space Charge and Breakdown Characteristics 32

2.3 Effect of Inorganic Nanofiller on Space Charge and Dielectric Breakdown 45

2.3.1 Metal Oxide Nanoparticles 45

2.3.2 Nanoplatelets 52

2.4 Effect of Organic Compounds on Space Charge and Dielectric Breakdown 64

2.4.1 Introduction 64

2.4.2 Voltage Stabilizer 64

2.4.3 Antioxidant Additives 80

2.5 Conclusion and Outlook 92

References 92

3 Electrical Treeing Phenomenon 103

3.1 Introduction 103

3.2 Electrical Treeing Under Impulse Superimposed on DC Voltage 105

3.2.1 Effects of Impulse Amplitude 106

3.2.2 Effects of Impulse Frequency 111

3.2.3 Effects of DC Voltage Amplitude 112

3.3 Effect of Ambient Temperature on Electrical Treeing 120

3.3.1 Effect of Low Temperature 120

3.3.2 Effect of Operating Temperature 129

3.4 Effect of Bending Deformation on Electrical Treeing 141

3.4.1 Effect of Bending Deformation 141

3.4.2 Effect of Elastic Phase 148

3.5 Methods for Suppressing Electrical Treeing 154

3.5.1 Effect of the Type of Voltage Stabilizer 157

3.5.2 Effect of the Content of Voltage Stabilizer 160

3.6 Conclusion and Outlook 165

References 166

4 Insulation Thickness Optimization for HVDC Cables 173

4.1 Introduction 173

4.1.1 Development of Insulation Thickness of HVDC Cables 173

4.1.2 Advantages of Insulation Thinning 174

4.2 Electric Field Distribution Calculation Model for HVDC Cables 174

4.2.1 Classical Electromagnetic Theoretical Model 174

4.2.2 Bipolar Electronic-Ionic Charge Transport Model 178

4.2.2.1 Charge Generation 179

4.2.2.2 Charge Transport 179

4.2.2.3 Charge Recombination 182

4.2.2.4 Charge Extraction 182

4.3 Space Charge and Electric Field Under DC Voltage 182

4.4 Space Charge and Electric Field Under Polarity Reversal Voltage 187

4.4.1 Effect of Temperature Gradients 188

4.4.2 Effect of Polarity Reversal Periods 194

4.5 Insulation Thickness Optimization for HVDC Cables 198

4.5.1 Theoretical Design and Verification of Insulation Thickness of dc Cable 198

4.5.1.1 Design Method of Insulation Thickness of HVDC Cables 199

4.5.1.2 Analysis and Calculation of Insulation Thickness of HVDC Cables 200

4.5.1.3 Verification of Insulation Thickness of DC Cable 203

4.5.2 Insulation Thickness Optimization Based on Modified BEICT Model 207

4.6 Conclusions 214

References 214

Part II Polypropylene Insulation for HVAC Cables 219

5 Polarization and Dielectric Relaxation 221

5.1 Introduction 221

5.2 Effect of Blending Modification 225

5.2.1 FDS of PP Blend Insulation 225

Biographie:
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Sommaire:

An introduction to a cutting-edge, environmentally friendly insulation material

The installation and maintenance of high-voltage cables is an infrastructure problem with potentially major environmental impacts. In recent years, polypropylene has emerged as an environmentally friendly material for insulating high-voltage cables, particularly HVDC power cables and HVAC power cables. Polypropylene Cable Insulation begins with an introduction to high-voltage cables and the development of polypropylene insulation before describing the dielectric properties and applications of this insulation in both HVDC and HVAC contexts. The result is a thorough, accessible guide to an essential part of any environmentally friendly power grid.

Readers will also find:

• Detailed explorations of the relationship between space charge behaviors and trap characteristics
• Discussion of topics including polarization and dielectric relaxation, electrical treeing degradation, partial discharge, and more
• Graphs and tables illustrating experimental results

Polypropylene Cable Insulation is ideal for electrical power engineers, power transmission system operators, and any engineers or researchers working in power transmission and/or distribution cables....