Includes bibliographical references and index.

ContentsPrefacePreface to the second editionPreface to the first edition1 Introduction to protective relaying 1.1 What is relaying? 1.2 Power system structural considerations 1.3 Power system bus configurations 1.4 The nature of relaying 1.5 Elements of a protection system 1.6 International practices 1.7 SummaryProblemsReferences 2 Relay operating principles 2.1 Introduction 2.2 Detection of faults 2.3 Relay designs 2.4 Electromechanical relays 2.5 Solid-state relays 2.6 Computer relays 2.7 Other relay design considerations 2.8 Control circuits, a beginning 2.9 Summary Problems References 3 Current and voltage transformers 3.1 Introduction 3.2 Steady-state performance of current transformers 3.3 Transient performance of current transformers 3.4 Special connections of current transformers 3.5 Linear couplers and electronic current transformers 3.6 Voltage transformers 3.7 Coupling capacitor voltage transformers 3.8 Transient performance of CCVTs 3.9 Electronic voltage transformers 3.10 Summary Problems References 4 Nonpilot overcurrent protection of transmission lines 4.1 Introduction 4.2 Fuses, sectionalizers, reclosers 4.3 Inverse, time-delay overcurrent relays 4.4 Instantaneous overcurrent relays 4.5 Directional overcurrent relays 4.6 Polarizing 4.7 Summary Problems References 5 Nonpilot distance protection of transmission lines 5.1 Introduction 5.2 Stepped distance protection 5.3 R-X diagram 5.4 Three-phase distance relays 5.5 Distance relay types 5.6 Relay operation with zero voltage 5.7 Polyphase relays 5.8 Relays for multi-terminal lines 5.9 Protection of parallel lines 5.10 Effect of transmission line compensation devices 5.11 Loadability of relays 5.12 Summary Problems References 6 Pilot protection of transmission lines 6.1 Introduction 6.2 Communication channels 6.3 Tripping versus blocking 6.4 Directional comparison blocking 6.5 Directional comparison unblocking 6.6 Underreaching transfer trip 6.7 Permissive overreaching transfer trip 6.8 Permissive underreaching transfer trip 6.9 Phase comparison relaying 6.10 Current differential 6.11 Pilot wire relaying 6.12 Multi-terminal lines 6.13 Summary Problems References 7 Rotating machinery protection 7.1 Introduction 7.2 Stator faults 7.3 Rotor faults 7.4 Unbalanced currents 7.5 Overload 7.6 Overspeed 7.7 Abnormal voltages and frequencies 7.8 Loss of excitation 7.9 Loss of synchronism 7.10 Power plant auxiliary system 7.11 Winding connections 7.12 Startup and motoring 7.13 Inadvertent energization 7.14 Torsional vibration 7.15 Sequential tripping 7.16 Summary Problems References 8 Transformer protection 8.1 Introduction 8.2 Overcurrent protection 8.3 Percentage differential protection 8.4 Causes of false differential currents 8.5 Supervised differential relays 8.6 Three-phase transformer protection 8.7 Volts-per-hertz protection 8.8 Nonelectrical protection 8.9 Protection systems for transformers 8.10 Summary Problems References 9 Bus, reactor and capacitor protection 9.1 Introduction to bus protection 9.2 Overcurrent relays 9.3 Percentage differential relays 9.4 High-impedance voltage relays 9.5 Moderately high impedance relay 9.6 Linear couplers 9.7 Directional comparison 9.8 Partial differential protection 9.9 Introduction to shunt reactor protection 9.10 Dry-type reactors 9.11 Oil-immersed reactors 9.12 Introduction to shunt capacitor bank protection 9.13 Static var compensator protection 9.14 Static compensator 9.15 Summary Problems References 10 Power system phenomena and relaying considerations 10.1 Introduction 10.2 Power system stability 10.3 Steady-state stability 10.4 Transient stability 10.5 Voltage stability 10.6 Dynamics of system frequency 10.7 Series capacitors and reactors 10.8 Independent power producers 10.9 Islanding 10.10 Blackouts and restoration 10.11 Summary Problems References 11 Relaying for system performance 11.1 Introduction 11.2 System integrity protection schemes 11.3 Underfrequency load shedding 11.4 Undervoltage load shedding 11.5 Out-of-step relaying 11.6 Loss-of-field relaying 11.7 Adaptive relaying 11.8 Hidden failures 11.9 Distance relay polarizing 11.10 Summary Problems References 12 Switching schemes and procedures 12.1 Introduction 12.2 Relay testing 12.3 Computer programs for relay setting 12.4 Breaker failure relaying 12.5 Reclosing 12.6 Single-phase operation 12.7 Summary References 13 Monitoring performance of power systems 13.1 Introduction 13.2 Oscillograph analysis 13.3 Synchronized sampling 13.4 Fault location 13.5 Alarms 13.6 COMTRADE and SYNCHROPHASOR standards 13.7 Summary Problems References Appendix A: IEEE device numbers and functions Appendix B: Symmetrical components Appendix C: Power equipment parameters Appendix D: Inverse time overcurrent relay characteristics Index.

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