Condition Monitoring of Rotating Electrical Machines
Condition monitoring of engineering plant has increased in importance as engineering processes are automated and manpower is reduced. However, electrical machinery receives attention only at infrequent intervals when plant is shut down and the application of protective relays to machines has also re...
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| Main Authors | , , , |
|---|---|
| Format | eBook |
| Language | English |
| Published |
Stevenage
The Institution of Engineering and Technology
2008
Institution of Engineering and Technology Institution of Engineering and Technology (The IET) Institution of Engineering & Technology IET |
| Edition | 2 |
| Series | IET power and energy series v.56 |
| Subjects | |
| Online Access | Get full text |
| ISBN | 0863417418 9780863417412 0863419917 9780863419911 0863417396 9780863417399 |
| DOI | 10.1049/PBPO056E |
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| Abstract | Condition monitoring of engineering plant has increased in importance as engineering processes are automated and manpower is reduced. However, electrical machinery receives attention only at infrequent intervals when plant is shut down and the application of protective relays to machines has also reduced operator surveillance.
A first edition of Condition Monitoring of Electrical Machines, written by Tavner and Penman, was published in 1987. The economics of industry have now changed, as a result of the privatisation and deregulation of the energy industry, placing emphasis on the importance of reliable operation of plant, throughout the whole life cycle, regardless of first cost. The availability of advanced electronics and software in powerful instrumentation, computers, and digital signal processors (DSP) has simplified our ability to instrument and analyse machinery. As a result condition monitoring is now being applied to a wider range of systems, from fault-tolerant drives of a few hundred watts in the aerospace industry, to machinery of a few hundred megawatts in major capital plant.
In this new book the original authors have been joined by Ran, an expert in power electronics and control, and Sedding, an expert in the monitoring of electrical insulation systems. Together the authors have revised and expanded the earlier book, merging their own experience with that of machine analysts to bring it up to date. The book is aimed at professional engineers in the energy, process engineering and manufacturing industries, plus research workers and students. |
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| AbstractList | Condition monitoring of engineering plants has increased in importance as engineering processes are automated and manpower is reduced. However, electrical machinery receives attention only at infrequent intervals when plant is shut down and the application of protective relays to machines has also reduced operator surveillance. A first edition of Condition Monitoring of Electrical Machines, written by Tavner and Penman, was published in 1987. The economics of industry have now changed, as a result of the privatisation and deregulation of the energy industry, placing emphasis on the importance of reliable operation of plant, throughout the whole life cycle, regardless of first cost. The availability of advanced electronics and software in powerful instrumentation, computers, and digital signal processors (DSP) has simplified our ability to instrument and analyse machinery. As a result condition monitoring is now being applied to a wider range of systems from fault-tolerant drives of a few hundred watts in the aerospace industry, to machinery of a few hundred megawatts in major capital plant. In this new book the original authors have been joined by Ran, an expert in power electronics and control, and Sedding, an expert in the monitoring of electrical insulation systems. Together the authors have revised and expanded the earlier book, merging their own experience with that of machine analysts to bring it up to date. Condition monitoring of engineering plant has increased in importance as engineering processes are automated and manpower is reduced. However, electrical machinery receives attention only at infrequent intervals when plant is shut down and the application of protective relays to machines has also reduced operator surveillance. A first edition of Condition Monitoring of Electrical Machines, written by Tavner and Penman, was published in 1987. The economics of industry have now changed, as a result of the privatisation and deregulation of the energy industry, placing emphasis on the importance of reliable operation of plant, throughout the whole life cycle, regardless of first cost. The availability of advanced electronics and software in powerful instrumentation, computers, and digital signal processors (DSP) has simplified our ability to instrument and analyse machinery. As a result condition monitoring is now being applied to a wider range of systems, from fault-tolerant drives of a few hundred watts in the aerospace industry, to machinery of a few hundred megawatts in major capital plant. In this new book the original authors have been joined by Ran, an expert in power electronics and control, and Sedding, an expert in the monitoring of electrical insulation systems. Together the authors have revised and expanded the earlier book, merging their own experience with that of machine analysts to bring it up to date. The book is aimed at professional engineers in the energy, process engineering and manufacturing industries, plus research workers and students. This book incorporates the important changes that have taken place in the energy industry. Includes new and important information about failure mechanisms, reliabilty, instrumentation, signal processing and the management of rotating machine assets. Condition monitoring of engineering plant has increased in importance as engineering processes are automated and manpower is reduced. However, electrical machinery receives attention only at infrequent intervals when plant is shut down and the application of protective relays to machines has also reduced operator surveillance. A first edition of Condition Monitoring of Electrical Machines, written by Tavner and Penman, was published in 1987. The economics of industry have now changed, as a result of the privatisation and deregulation of the energy industry, placing emphasis on the importance of reliable operation of plant, throughout the whole life cycle, regardless of first cost. The availability of advanced electronics and software in powerful instrumentation, computers, and digital signal processors (DSP) has simplified our ability to instrument and analyse machinery. As a result condition monitoring is now being applied to a wider range of systems, from fault-tolerant drives of a few hundred watts in the aerospace industry, to machinery of a few hundred megawatts in major capital plant. In this new book the original authors have been joined by Ran, an expert in power electronics and control, and Sedding, an expert in the monitoring of electrical insulation systems. Together the authors have revised and expanded the earlier book, merging their own experience with that of machine analysts to bring it up to date. The book is aimed at professional engineers in the energy, process engineering and manufacturing industries, plus research workers and students. The First Edition of this book, written by Tavner and Penman, was published in 1987. The economics of industry have now changed as a result of the privatization and deregulation of the energy industry, placing far more emphasis on the importance of the reliable operation of a plant throughout the whole life-cycle, regardless of first costs. As engineering processes are automated and manpower is reduced, condition monitoring of engineering plants has increased in importance. The availability of advanced electronics and software in powerful instrumentation, computers and Digital Signal Processors (DSP) has simplified our ability to instrument and analyze machinery. As a result, condition monitoring is now being applied to a wider range of systems, from fault-tolerant drives of a few hundred Watts in the aerospace industry, to machinery of a few hundred Megawatts in major capital plants. |
| Author | Sedding, Howard Tavner, Peter Ran, Li Penman, Jim |
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| Keywords | electric machines rotating electrical machines condition monitoring |
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| Notes | Previous ed. published under the title: Condition monitoring of electrical machines / Peter Tavner, Jim Penman. Letchworth, England : Research Studies Press, 1987. Available also in a print ed. Mode of access: Internet via World Wide Web. Title from title screen. |
| OCLC | 476226794 |
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| PageCount | 306 |
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| PublicationSeriesTitle | IET power and energy series v.56 |
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| Publisher | The Institution of Engineering and Technology Institution of Engineering and Technology Institution of Engineering and Technology (The IET) Institution of Engineering & Technology IET |
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| Snippet | Condition monitoring of engineering plant has increased in importance as engineering processes are automated and manpower is reduced. However, electrical... Condition monitoring of engineering plants has increased in importance as engineering processes are automated and manpower is reduced. However, electrical... The First Edition of this book, written by Tavner and Penman, was published in 1987. The economics of industry have now changed as a result of the... This book incorporates the important changes that have taken place in the energy industry. Includes new and important information about failure mechanisms,... |
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| SubjectTerms | Electric generators Electric machinery Electric machinery--Monitoring Electric motors Electrical Machine Design Mechanics & Mechanical Engineering Monitoring Power networks, systems, stations & plants Power Resources Rotational motion TECHNOLOGY & ENGINEERING |
| SubjectTermsDisplay | Electric generators. Electric machinery--Monitoring Electric motors. Electronic books. Rotational motion. |
| TableOfContents | Chapter 1: Introduction to condition monitoring -- Chapter 2: Construction, operation and failure modes of electrical machines -- Chapter 3: Reliability of machines and typical failure rates -- Chapter 4: Instrumentation requirements -- Chapter 5: Signal processing requirements -- Chapter 6: Temperature monitoring -- Chapter 7: Chemical monitoring -- Chapter 8: Vibration monitoring -- Chapter 9: Electrical techniques: current, flux and power monitoring -- Chapter 10: Electrical techniques: discharge monitoring -- Chapter 11: Application of artificial intelligence techniques -- Chapter 12: Condition-based maintenance and asset management -- Appendix: Failure modes and root causes in rotating electrical machines Condition monitoring of rotating electrical machines -- Contents -- Preface -- Acknowledgments -- Nomenclature -- Chapter 1 Introduction to condition monitoring -- Chapter 2 Construction, operation and failure modes of electrical machines -- Chapter 3 Reliability of machines and typical failure rates -- Chapter 4 Instrumentation requirements -- Chapter 5 Signal processing requirements -- Chapter 6 Temperature monitoring -- Chapter 7 Chemical monitoring -- Chapter 8 Vibration monitoring -- Chapter 9 Electrical techniques: current, flux and power monitoring -- Chapter 10 Electrical techniques: discharge monitoring -- Chapter 11 Application of artificial intelligence techniques -- Chapter 12 Condition-based maintenance and asset management -- Appendix Failure modes and root causes in rotating electrical machines -- Index Title Page Nomenclature Preface Table of Contents 1. Introduction to Condition Monitoring 2. Construction, Operation and Failure Modes of Electrical Machines 3. Reliability of Machines and Typical Failure Rates 4. Instrumentation Requirements 5. Signal Processing Requirements 6. Temperature Monitoring 7. Chemical Monitoring 8. Vibration Monitoring 9. Electrical Techniques: Current, Flux and Power Monitoring 10. Electrical Techniques: Discharge Monitoring 11. Application of Artificial Intelligence Techniques 12. Condition-Based Maintenance and Asset Management Appendix: Failure Modes and Root Causes in Rotating Electrical Machines Index 8.6.5 Shock pulse monitoring -- 8.7 Conclusion -- 8.8 References -- 9 Electrical techniques: current, flux and power monitoring -- 9.1 Introduction -- 9.2 Generator and motor stator faults -- 9.2.1 Generator stator winding fault detection -- 9.2.2 Stator current monitoring for stator faults -- 9.2.3 Brushgear fault detection -- 9.2.4 Rotor-mounted search coils -- 9.3 Generator rotor faults -- 9.3.1 General -- 9.3.2 Earth leakage faults on-line -- 9.3.3 Turn-to-turn faults on-line -- 9.3.4 Turn-to-turn and earth leakage faults off-line -- 9.4 Motor rotor faults -- 9.4.1 General -- 9.4.2 Airgap search coils -- 9.4.3 Stator current monitoring for rotor faults -- 9.4.4 Rotor current monitoring -- 9.5 Generator and motor comprehensive methods -- 9.5.1 General -- 9.5.2 Shaft flux -- 9.5.3 Stator current -- 9.5.4 Power -- 9.5.5 Shaft voltage or current -- 9.5.6 Mechanical and electrical interaction -- 9.6 Effects of variable speed operation -- 9.7 Conclusion -- 9.8 References -- 10 Electrical techniques: discharge monitoring -- 10.1 Introduction -- 10.2 Background to discharge detection -- 10.3 Early discharge detection methods -- 10.3.1 RF coupling method -- 10.3.2 Earth loop transient method -- 10.3.3 Capacitive coupling method -- 10.3.4 Wideband RF method -- 10.3.5 Insulation remanent life -- 10.4 Detection problems -- 10.5 Modern discharge detection methods -- 10.6 Conclusion -- 10.7 References -- 11 Application of artificial intelligence techniques -- 11.1 Introduction -- 11.2 Expert systems -- 11.3 Fuzzy logic -- 11.4 Artificial neural networks -- 11.4.1 General -- 11.4.2 Supervised learning -- 11.4.3 Unsupervised learning -- 11.5 Conclusion -- 11.6 References -- 12 Condition-based maintenance and asset management -- 12.1 Introduction -- 12.2 Condition-based maintenance -- 12.3 Life-cycle costing -- 12.4 Asset management -- 12.5 Conclusion 4.4 Force and torque measurement -- 4.5 Electrical and magnetic measurement -- 4.6 Wear and debris measurement -- 4.7 Signal conditioning -- 4.8 Data acquisition -- 4.9 Conclusion -- 4.10 References -- 5 Signal processing requirements -- 5.1 Introduction -- 5.2 Spectral analysis -- 5.3 High-order spectral analysis -- 5.4 Correlation analysis -- 5.5 Signal processing for vibration -- 5.5.1 General -- 5.5.2 Cepstrum analysis -- 5.5.3 Time averaging and trend analysis -- 5.6 Wavelet analysis -- 5.7 Conclusion -- 5.8 References -- 6 Temperature monitoring -- 6.1 Introduction -- 6.2 Local temperature measurement -- 6.3 Hot-spot measurement and thermal images -- 6.4 Bulk measurement -- 6.5 Conclusion -- 6.6 References -- 7 Chemical monitoring -- 7.1 Introduction -- 7.2 Insulation degradation -- 7.3 Factors that affect detection -- 7.4 Insulation degradation detection -- 7.4.1 Particulate detection: core monitors -- 7.4.2 Particulate detection: chemical analysis -- 7.4.3 Gas analysis off-line -- 7.4.4 Gas analysis on-line -- 7.5 Lubrication oil and bearing degradation -- 7.6 Oil degradation detection -- 7.7 Wear debris detection -- 7.7.1 General -- 7.7.2 Ferromagnetic techniques -- 7.7.3 Other wear debris detection techniques -- 7.8 Conclusion -- 7.9 References -- 8 Vibration monitoring -- 8.1 Introduction -- 8.2 Stator core response -- 8.2.1 General -- 8.2.2 Calculation of natural modes -- 8.2.3 Stator electromagnetic force wave -- 8.3 Stator end-winding response -- 8.4 Rotor response -- 8.4.1 Transverse response -- 8.4.2 Torsional response -- 8.5 Bearing response -- 8.5.1 General -- 8.5.2 Rolling element bearings -- 8.5.3 Sleeve bearings -- 8.6 Monitoring techniques -- 8.6.1 Overall level monitoring -- 8.6.2 Frequency spectrum monitoring -- 8.6.3 Faults detectable from the stator force wave -- 8.6.4 Torsional oscillation monitoring Intro -- Contents -- Preface -- Acknowledgments -- Nomenclature -- 1 Introduction to condition monitoring -- 1.1 Introduction -- 1.2 The need for monitoring -- 1.3 What and when to monitor -- 1.4 Scope of the text -- 1.5 References -- 2 Construction, operation and failure modes of electrical machines -- 2.1 Introduction -- 2.2 Materials and temperature -- 2.3 Construction of electrical machines -- 2.3.1 General -- 2.3.2 Stator core and frame -- 2.3.3 Rotors -- 2.3.4 Windings -- 2.3.5 Enclosures -- 2.3.6 Connections -- 2.3.7 Summary 26 -- 2.4 Structure of electrical machines and their types -- 2.5 Machine specification and failure modes -- 2.6 Insulation ageing mechanisms -- 2.6.1 General -- 2.6.2 Thermal ageing -- 2.6.3 Electrical ageing -- 2.6.4 Mechanical ageing -- 2.6.5 Environmental ageing -- 2.6.6 Synergism between ageing stresses -- 2.7 Insulation failure modes -- 2.7.1 General -- 2.7.2 Stator winding insulation -- 2.7.3 Stator winding faults -- 2.7.4 Rotor winding faults -- 2.8 Other failure modes -- 2.8.1 Stator core faults -- 2.8.2 Connection faults (high-voltage motors and generators) -- 2.8.3 Water coolant faults (all machines) -- 2.8.4 Bearing faults -- 2.8.5 Shaft voltages -- 2.9 Conclusion -- 2.10 References -- 3 Reliability of machines and typical failure rates -- 3.1 Introduction -- 3.2 Definition of terms -- 3.3 Failure sequence and effect on monitoring -- 3.4 Typical root causes and failure modes -- 3.4.1 General -- 3.4.2 Root causes -- 3.4.3 Failure modes -- 3.5 Reliability analysis -- 3.6 Machinery structure -- 3.7 Typical failure rates and MTBFs -- 3.8 Conclusion -- 3.9 References -- 4 Instrumentation requirements -- 4.1 Introduction -- 4.2 Temperature measurement -- 4.3 Vibration measurement -- 4.3.1 General -- 4.3.2 Displacement transducers -- 4.3.3 Velocity transducers -- 4.3.4 Accelerometers 12.6 References -- Appendix: Failure modes and root causes in rotating electrical machines -- Index |
| Title | Condition Monitoring of Rotating Electrical Machines |
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