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Thyristor-Based FACTS Controllers for Electrical Transmission Systems

  • ID: 2181001
  • Book
  • 496 Pages
  • John Wiley and Sons Ltd
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An important new resource for the international utility market

Flexible AC Transmission System (FACTS) technology is fast becoming a mainstay of modern electrical power systems. Thyristor–based controllers such as Static Var Compensator (SVC) and Thyristor Controlled Series Capacitor (TCSC) constitute the key components of FACTS technology that have wide application potential around the world, especially in the restructured power system environment.

By integrating material from several publications in the available literature, this comprehensive reference book makes an elaborate presentation on:

  • Operating principles, control systems, and modeling of different SVCs and TCSC
  • Control system performance, including the influence of measurement systems, network resonances, and harmonic interactions
  • Controller design for enhancing power transfer, stability and damping, mitigating subsynchronous resonances, preventing voltage instability, etc.
  • Controller interactions and techniques for coordinating FACTS controllers
  • Emerging FACTS controllers–STATCOM, SSSC, and UPFC

Thyristor–based FACTS Controllers for Electrical Transmission Systems offers an in–depth discussion of both theoretical concepts and practical applications, enhanced by examples and case studies of control design and system performance. Filling the need for a comprehensive text in this area, the book will prove to be an important resource for academics, students, and practicing engineers involved in FACTS technology.

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1. Introduction.

1.1 Background.

1.2 Electrical Transmission Networks.

1.3 Conventional Control Mechanisms.

1.4 Flexible ac Transmission Systems (FACTS).

1.5 Emerging Transmission Networks.

2. Reactor–Power Control in Electrical Power Transmission Systems.

2.1 Reacrive Power.

2.2 Uncompensated Transmission Lines.

2.3 Passive Compensation.

2.4 Summary.

3. Principles of Conventional Reactive–Power Compensators.

3.1 Introduction.

3.2 Synchronous Condensers.

3.3 The Saturated Reactor (SR).

3.4 The Thyristor–Controlled Reactor (TCR).

3.5 The Thyristor–Controlled Transformer (TCT).

3.6 The Fixed Capacitor–Thyristor–Controlled Reactor (FC–TCR).

3.7 The Mechanically Switched Capacitor–Thristor–Controlled Reactor (MSC–TCR).

3.8 The Thyristor–Switched capacitor and Reactor.

3.9 The Thyristor–Switched capacitor–Thyristor–Controlled Reactor (TSC–TCR).

3.10 A Comparison of Different SVCs.

3.11 Summary.

4. SVC Control Components and Models.

4.1 Introduction

4.2 Measurement Systems.

4.3 The Voltage Regulator.

4.4 Gate–Pulse Generation.

4.5 The Synchronizing System.

4.6 Additional Control and Protection Functions.

4.7 Modeling of SVC for Power–System Studies.

4.8 Summary.

5. Conceepts of SVC Voltage Control.

5.1 Introduction

5.2 Voltage Control.

5.3 Effect of Network Resonances on the Controller Response.

5.4 The 2nd Harmonic Interaction Between the SVC and ac Network.

5.5 Application of the SVC to Series–Compensated ac Systems.

5.6 3rd Harmonic Distortion.

5.7 Voltage–Controlled Design Studies.

5.8 Summary.

6. Applications.

6.1 Introduction.

6.2 Increase in Steady–State Power–Transfer Capacity.

6.3 Enhancement of Transient Stability.

6.4 Augmentation of Power–System Damping.

6.5 SVC Mitigation of Subsychronous Resonance (SSR).

6.6 Prevention of Voltage Instability.

6.7 Improvement of HVDC Link Performance.

6.8 Summary.

7. The Thyristor–Controlled SeriesCapacitor (TCSC).

7.1 Series Compensation.

7.2 The TCSC Controller.

7.3 Operation of the TCSC.

7.4 The TSSC.

7.5 Analysis of the TCSC.

7.6 Capability Characteristics.

7.7 Harmonic Performance.

7.8 Losses.

7.9 Response of the TCSC.

7.10 Modeling of the TCSC.

7.11 Summary.

8. TCSC Applications.

8.1 Introduction.

8.2 Open–Loop Control.

8.3 Closed–Loop Control.

8.4 Improvement of the System–Stability Limit.

8.5 Enhancement of System Damping.

8.6 Subsynchronous Resonanace (SSR) Mitigation.

8.7 Voltage–Collapse Prevention.

8.8 TCSC Installations.

8.9 Summary.

9. Coordination of FACTS Controllers.

9.1 Introduction

9.2 Controller Interactions.

9.3 SVC–SVC Interaction.

9.4 SVC–HVDC Interaction.

9.5 SVC–TCSC Interaction.

9.6 TCSC–TCSC Interaction.

9.7 Performance Criteria for Damping–Controller Design.

9.8 Coordination of Multiple Controllers Using Linear–Control Techniques.

9.9 Coordination of Multiple Controllers using Nonlinear–Control Techniques.

9.10 Summary.

10. Emerging FACTS Controllers.

10.1 Introduction.

10.2 The STATCOM.

10.3 THE SSSC.

10.4 The UPFC.

10.5 Comparative Evaluation of Different FACTS Controllers.

10.6 Future Direction of FACTS Technology.

10.7 Summary.

Appendix A. Design of an SVC Voltage Regulator.

A.1 Study System.

A.2 Method of System Gain.

A.3 Elgen Value Analysis.

A.4 Simulator Studies.

A.5 A Comparison of Physical Simulator results With Analytical and Digital Simulator Results Using Linearized Models.

Appendix B. Transient–Stability Enhancement in a Midpoint SVC–Compensated SMIB System.

Appendix C. Approximate Multimodal decomposition Method for the Design of FACTS Controllers.

C.1 Introduction.

C.2 Modal Analysis of the ith Swing Mode,  

C.3 Implications of Different Transfer Functions.

C.4 Design of the Damping Controller.

Appendix D. FACTS Terms and Definitions.


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R. Mohan Mathur
Rajiv K. Varma
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