Electrical Power System Protection

1. Front Matter

   Pages i-xx

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2. Fuses

   • C. Christopoulos, A. Wright

   Pages 1-38

3. Current transformers

   • C. Christopoulos, A. Wright

   Pages 39-86

4. Voltage transformers

   • C. Christopoulos, A. Wright

   Pages 87-101

5. Overcurrent and earth fault protection

   • C. Christopoulos, A. Wright

   Pages 103-144

6. Current-differential protective schemes

   • C. Christopoulos, A. Wright

   Pages 145-177

7. The protection of transformers

   • C. Christopoulos, A. Wright

   Pages 179-225

8. The protection of rotating machines

   • C. Christopoulos, A. Wright

   Pages 227-278

9. The protection of busbars

   • C. Christopoulos, A. Wright

   Pages 279-305

10. The protection of overhead lines and cables by current-differential schemes

    • C. Christopoulos, A. Wright

    Pages 307-344

11. Interlock and phase-comparison schemes for the protection of overhead transmission lines

    • C. Christopoulos, A. Wright

    Pages 345-384

12. Distance-type protective schemes for overhead lines and cables

    • C. Christopoulos, A. Wright

    Pages 385-438

13. Ultra-high-speed schemes for the protection of long transmission lines

    • C. Christopoulos, A. Wright

    Pages 439-478

14. Digital communications

    • C. Christopoulos, A. Wright

    Pages 479-500

15. Digital signal processing (DSP) and protection

    • C. Christopoulos, A. Wright

    Pages 501-524

16. New relaying concepts

    • C. Christopoulos, A. Wright

    Pages 525-553

17. Back Matter

    Pages 555-607

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The death of Professor Arthur Wright in the summer of 1996 deprived me of a friend and a colleague whose judgement and experience shaped this book. I pay tribute to his contributions to protection and electrical engineering education. In the five years since the first edition appeared, many developments have taken place and it is now necessary to update the book. The use of digital communications and advanced signal processing techniques is now widespread and several fully numeric relays are available from manu­ facturers. Two new Chapters 13 and 14 have been added to introduce readers to these concepts and associated techniques. Artificial intelligence is making its impact in all engineering applications and power system protection is no exception. Expert systems, fuzzy logic, artificial neural networks, adaptive and integrated protection, synchronized measurements using the global positioning system, genetic algorithms, flexible a.c. transmission systems, are some of the techniques considered in connection with protection. Although many of these techniques have not yet found major application in protection, it is nevertheless essential for the educated protection engineer to have a basic understanding of the underlying principles and methodology so that he, or she, can evaluate their suitability for new relaying problems and applications. Chapter 15 was therefore added to guide readers through this developing area. I have also added some new material in other chapters to reflect changes over the past years.

• Phase
• Signal
• communication
• digital signal processor
• electrical engineering
• transmission

• University of Nottingham, Nottingham, UK

  C. Christopoulos, A. Wright

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