Book description
For many years, Protective Relaying: Principles and Applications has been the go-to text for gaining proficiency in the technological fundamentals of power system protection. Continuing in the bestselling tradition of the previous editions by the late J. Lewis Blackburn, the Fourth Edition retains the core concepts at the heart of power system anal
Table of contents
- Preface to the Fourth Edition
- Preface to the Third Edition
- Preface to the Second Edition
- Preface to the First Edition
- Author
-
Chapter 1 - Introduction and General Philosophies
- 1.1 Introduction and Definitions
- 1.2 Typical Protective Relays and Relay Systems
- 1.3 Typical Power Circuit Breakers
- 1.4 Nomenclature and Device Numbers
- 1.5 Typical Relay and Circuit Breaker Connections
- 1.6 Basic Objectives of System Protection
- 1.7 Factors Affecting the Protection System
- 1.8 Classification of Relays
- 1.9 Protective Relay Performance
- 1.10 Principles of Relay Application
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1.11 Information for Application
- 1.11.1 System Configuration
- 1.11.2 Impedance and Connection of the Power Equipment, System Frequency, System Voltage, and System Phase Sequence
- 1.11.3 Existing Protection and Problems
- 1.11.4 Operating Procedures and Practices
- 1.11.5 Importance of the System Equipment Being Protected
- 1.11.6 System Fault Study
- 1.11.7 Maximum Loads and System Swing Limits
- 1.11.8 Current and Voltage Transformer Locations, Connections, and Ratios
- 1.11.9 Future Expansion
- 1.12 Structural Changes within the Electric Power Industry
- 1.13 Reliability and Protection Standards
- Bibliography
-
Chapter 2 - Fundamental Units: Per-Unit and Percent Values
- 2.1 Introduction
- 2.2 Per-Unit and Percent Definitions
- 2.3 Advantages of Per Unit and Percent
- 2.4 General Relations between Circuit Quantities
- 2.5 Base Quantities
- 2.6 Per-Unit and Percent Impedance Relations
- 2.7 Per-Unit and Percent Impedances of Transformer Units
- 2.8 Per-Unit and Percent Impedances of Generators
- 2.9 Per-Unit and Percent Impedances of Overhead Lines
- 2.10 Changing Per-Unit (Percent) Quantities to Different Bases
- Bibliography
-
Chapter 3 - Phasors and Polarity
- 3.1 Introduction
- 3.2 Phasors
- 3.3 Circuit and Phasor Diagrams for a Balanced Three-Phase Power System
- 3.4 Phasor and Phase Rotation
- 3.5 Polarity
- 3.6 Application of Polarity for Phase-Fault Directional Sensing
- 3.7 Directional Sensing for Ground Faults: Voltage Polarization
- 3.8 Directional Sensing for Ground Faults: Current Polarization
- 3.9 Other Directional-Sensing Connections
- 3.10 Application Aspects of Directional Relaying
- 3.11 Summary
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Chapter 4 - Symmetrical Components: A Review
- 4.1 Introduction and Background
- 4.2 Positive-Sequence Set
- 4.3 Nomenclature Convenience
- 4.4 Negative-Sequence Set
- 4.5 Zero-Sequence Set
- 4.6 General Equations
- 4.7 Sequence Independence
- 4.8 Positive-Sequence Sources
- 4.9 Sequence Networks
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4.10 Shunt Unbalance Sequence Network Interconnections
- 4.10.1 Fault Impedance
- 4.10.2 Substation and Tower-Footing Impedance
- 4.10.3 Sequence Interconnections for Three-Phase Faults
- 4.10.4 Sequence Interconnections for Single-Phase-to-Ground Faults
- 4.10.5 Sequence Interconnections for Phase-to-Phase Faults
- 4.10.6 Sequence Interconnections for Double-Phase-to-Ground Faults
- 4.10.7 Other Sequence Interconnections for Shunt System Conditions
- 4.11 Example: Fault Calculations on a Typical System Shown in Figure 4.16
- 4.12 Example: Fault Calculation for Autotransformers
- 4.13 Example: Open-Phase Conductor
- 4.14 Example: Open-Phase Falling to Ground on One Side
- 4.15 Series and Simultaneous Unbalances
- 4.16 Overview
- 4.17 Summary
- Bibliography
- Appendix 4.1 Short-Circuit MVA and Equivalent Impedance
- Appendix 4.2 Impedance and Sequence Connections for Transformer Banks
- Appendix 4.3 Sequence Phase Shifts through Wye–Delta Transformer Banks
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Appendix 4.4 Impedance of Overhead Lines
- A.4.4-1 Resistance of Overhead Lines
- A.4.4-2 Inductive Reactance of a Single Conductor over Earth
- A.4.4-3 Mutual Inductive Reactance of Two Conductors over Earth
- A.4.4-4 Impedance of Three-Phase Overhead Lines
- A.4.4-5 GMR and GMD Concepts: Three-Phase Overhead Lines
- A.4.4-6 Three-Phase Overhead Line: Impact of Ground Wires and Earth Resistance
- Appendix 4.5 Zero-Sequence Impedance of Transformers
-
Chapter 5 - Relay Input Sources
- 5.1 Introduction
- 5.2 Equivalent Circuits of Current and Voltage Transformers
- 5.3 CTs for Protection Applications
- 5.4 CT Performance on a Symmetrical AC Component
- 5.5 Secondary Burdens during Faults
- 5.6 CT Selection and Performance Evaluation for Phase Faults
- 5.7 Performance Evaluation for Ground Relays
- 5.8 Effect of Unenergized CTs on Performance
- 5.9 Flux Summation Current Transformer
- 5.10 Current Transformer Performance on the DC Component
- 5.11 Summary: Current Transformer Performance Evaluation
- 5.12 Current Transformer Residual Flux and Subsidence Transients
- 5.13 Auxiliary Current Transformers in CT Secondary Circuits
- 5.14 Voltage Transformers for Protective Applications
- 5.15 Optical Sensors
- Bibliography
-
Chapter 6 - Protection Fundamentals and Basic Design Principles
- 6.1 Introduction
- 6.2 Differential Principle
- 6.3 Overcurrent–Distance Protection and the Basic Protection Problem
- 6.4 Backup Protection: Remote versus Local
-
6.5 Basic Design Principles
- 6.5.1 Time–Overcurrent Relays
- 6.5.2 Instantaneous Current–Voltage Relays
- 6.5.3 Directional-Sensing Power Relays
- 6.5.4 Polar Unit
- 6.5.5 Phase Distance Relays
- 6.5.6 R–X Diagram
- 6.5.7 Mho Characteristic
- 6.5.8 Single-Phase Mho Units
- 6.5.9 Polyphase Mho Units
- 6.5.10 Other Mho Units
- 6.5.11 Reactance Units
- 6.6 Ground Distance Relays
- 6.7 Solid-State Microprocessor Relays
- 6.8 Summary
- Bibliography
-
Chapter 7 - System-Grounding Principles
- 7.1 Introduction
- 7.2 Ungrounded Systems
- 7.3 Transient Overvoltages
- 7.4 Grounded-Detection Methods for Ungrounded Systems
- 7.5 High-Impedance Grounding Systems
- 7.6 System Grounding for Mine or Other Hazardous-Type Applications
- 7.7 Low-Impedance Grounding
- 7.8 Solid (Effective) Grounding
- 7.9 Ferroresonance in Three-Phase Power Systems
- 7.10 Safety Grounding
- 7.11 Grounding Summary and Recommendations
- Bibliography
-
Chatper 8 - Generator Protection/Intertie Protection for Distributed Generation
- 8.1 Introduction
- 8.2 Generator Connections and Overview of Typical Protection
-
8.3 Stator Phase-Fault Protection for All Size Generators
- 8.3.1 Differential Protection (87) for Small kVA (MVA) Generators
- 8.3.2 Multi-CT Differential Protection (87) for All Size Generators
- 8.3.3 High-Impedance Voltage Differential Protection for Generators
- 8.3.4 Direct-Connected Generator Current Differential Example
- 8.3.5 Phase Protection for Small Generators That Do Not Use Differentials
- 8.3.6 Unit Generator Current Differential (87) Example for Phase Protection
- 8.4 Unit Transformer Phase-Fault Differential Protection (87TG)
- 8.5 Phase-Fault Backup Protection (51 V) or (21)
- 8.6 Negative-Sequence Current Backup Protection
-
8.7 Stator Ground-Fault Protection
- 8.7.1 Ground-Fault Protection for Single Medium or Small Wye-Connected Generators (Type 1a: See Figure 8.3 and Figure 8.11)
- 8.7.2 Ground-Fault Protection of Multiple Medium or Small Wye- or Delta-Connected Generators (Type 2: See Figure 8.2 and Figure 8.12)
- 8.7.3 Ground-Fault Protection for Ungrounded Generators
- 8.7.4 Ground-Fault Protection for Very Small, Solidly Grounded Generators
- 8.7.5 Ground-Fault Protection for Unit-Connected Generators Using High-Impedance Neutral Grounding (Type 1b: See Figure 8.5)
- 8.7.6 Added Protection for 100% Generator Ground Protection with High-Resistance Grounding
- 8.7.7 High-Voltage Ground-Fault Coupling Can Produce V0 in High-Impedance Grounding Systems
- 8.7.8 Ground-Fault Protection for Multidirect-Connected Generators Using High-Resistance Grounding
- 8.8 Multiple Generator Units Connected Directly to a Transformer: Grounding and Protection
- 8.9 Field Ground Protection (64)
- 8.10 Generator Off-Line Protection
- 8.11 Reduced or Lost Excitation Protection (40)
-
8.12 Generator Protection for System Disturbances and Operational Hazards
- 8.12.1 Loss of Prime Mover: Generator Motoring (32)
- 8.12.2 Overexcitation: Volts per Hertz Protection (24)
- 8.12.3 Inadvertent Energization: Nonsynchronized Connection (67)
- 8.12.4 Breaker Pole Flashover (61)
- 8.12.5 Thermal Overload (49)
- 8.12.6 Off-Frequency Operation
- 8.12.7 Overvoltage
- 8.12.8 Loss of Synchronism: Out-of-Step
- 8.12.9 Subsynchronous Oscillations
- 8.13 Loss of Voltage Transformer Signal
- 8.14 Generator Breaker Failure
- 8.15 Excitation System Protection and Limiters
- 8.16 Synchronous Condenser Protection
- 8.17 Generator-Tripping Systems
- 8.18 Station Auxiliary Service System
-
8.19 Distributed Generator Intertie Protection
- 8.19.1 Power Quality Protection
- 8.19.2 Power System Fault Protection
- 8.19.3 System Protection for Faults on Distributed Generator Facilities
- 8.19.4 Other Intertie Protection Considerations
- 8.19.5 Induction Generators/Static Inverters/Wind Farms
- 8.19.6 Practical Considerations of Distributed Generation
- 8.20 Protection Summary
- Bibliography
-
Chapter 9 - Transformer, Reactor, and Shunt Capacitor Protection
- 9.1 Transformers
- 9.2 Factors Affecting Differential Protection
- 9.3 False Differential Current
- 9.4 Transformer Differential Relay Characteristics
- 9.5 Application and Connection of Transformer Differential Relays
- 9.6 Example: Differential Protection Connections for a Two-Winding Wye–Delta Transformer Bank
- 9.7 Load Tap-Changing Transformers
- 9.8 Example: Differential Protection Connections for Multiwinding Transformer Bank
- 9.9 Application of Auxiliaries for Current Balancing
- 9.10 Paralleling CTs in Differential Circuits
- 9.11 Special Connections for Transformer Differential Relays
- 9.12 Differential Protection for Three-Phase Banks of Single-Phase Transformer Units
- 9.13 Ground (Zero-Sequence) Differential Protection for Transformers
- 9.14 Equipment for Transfer Trip Systems
- 9.15 Mechanical Fault Detection for Transformers
- 9.16 Grounding Transformer Protection
- 9.17 Ground Differential Protection with Directional Relays
- 9.18 Protection of Regulating Transformers
- 9.19 Transformer Overcurrent Protection
- 9.20 Transformer Overload-Through-Fault-Withstand Standards
-
9.21 Examples: Transformer Overcurrent Protection
- 9.21.1 Industrial Plant or Similar Facility Served by a 2500 kVA, 12 kV: 480 V Transformer with 5.75% Impedance
- 9.21.2 Distribution or Similar Facility Served by a 7500 kVA, 115: 12 kV Transformer with 7.8% Impedance
- 9.21.3 Substation Served by a 12/16/20 MVA, 115: 12.5 kV Transformer with 10% Impedance
- 9.22 Transformer Thermal Protection
- 9.23 Overvoltage on Transformers
- 9.24 Summary: Typical Protection for Transformers
- 9.25 Reactors
- 9.26 Capacitors
- 9.27 Power System Reactive Requirements
- 9.28 Shunt Capacitor Applications
- 9.29 Capacitor Bank Designs
- 9.30 Distribution Capacitors Bank Protection
- 9.31 Designs and Limitations of Large Capacitor Banks
- 9.32 Protection of Large Capacitor Banks
- 9.33 Series Capacitor Bank Protection
- 9.34 Capacitor Bank Protection Application Issues
- Bibliography
- Appendix 9.1 Application of Digital Transformer Differential Relays
-
Chapter 10 - Bus Protection
- 10.1 Introduction: Typical Bus Arrangements
- 10.2 Single Breaker–Single Bus
- 10.3 Single Buses Connected with Bus Ties
- 10.4 Main and Transfer Buses with Single Breakers
- 10.5 Single Breaker–Double Bus
- 10.6 Double Breaker–Double Bus
- 10.7 Ring Bus
- 10.8 Breaker-and-Half Bus
- 10.9 Transformer–Bus Combination
- 10.10 General Summary of Buses
- 10.11 Differential Protection for Buses
- 10.12 Other Bus Differential Systems
- 10.13 Ground-Fault Bus
- 10.14 Protection Summary
- 10.15 Bus Protection: Practical Considerations
- Bibliography
-
Chapter 11 - Motor Protection
- 11.1 Introduction
- 11.2 Potential Motor Hazards
- 11.3 Motor Characteristics Involved in Protection
- 11.4 Induction Motor Equivalent Circuit
- 11.5 General Motor Protection
- 11.6 Phase-Fault Protection
- 11.7 Differential Protection
- 11.8 Ground-Fault Protection
- 11.9 Thermal and Locked-Rotor Protection
- 11.10 Locked-Rotor Protection for Large Motors (21)
- 11.11 System Unbalance and Motors
- 11.12 Unbalance and Phase Rotation Protection
- 11.13 Undervoltage Protection
- 11.14 Bus Transfer and Reclosing
- 11.15 Repetitive Starts and Jogging Protection
- 11.16 Multifunction Microprocessor Motor Protection Units
- 11.17 Synchronous Motor Protection
- 11.18 Summary: Typical Protection for Motors
- 11.19 Practical Considerations of Motor Protection
- Bibliography
-
Chapter 12 - Line Protection
- 12.1 Classifications of Lines and Feeders
- 12.2 Line Classifications for Protection
- 12.3 Techniques and Equipment for Line Protection
- 12.4 Coordination Fundamentals and General Setting Criteria
- 12.5 Distribution Feeder, Radial Line Protection, and Coordination
- 12.6 Example: Coordination for a Typical Distribution Feeder
- 12.7 Distributed Generators and Other Sources Connected to Distribution Lines
- 12.8 Example: Coordination for a Loop System
- 12.9 Instantaneous Trip Application for a Loop System
- 12.10 Short-Line Applications
- 12.11 Network and Spot Network Systems
- 12.12 Distance Protection for Phase Faults
- 12.13 Distance Relay Applications for Tapped and Multiterminal Lines
- 12.14 Voltage Sources for Distance Relays
- 12.15 Distance Relay Applications in Systems Protected by Inverse-Time–Overcurrent Relays
- 12.16 Ground-Fault Protection for Lines
- 12.17 Distance Protection for Ground Faults and Direction Overcurrent Comparisons
- 12.18 Fault Resistance and Relaying
- 12.19 Directional Sensing for Ground–Overcurrent Relays
- 12.20 Polarizing Problems with Autotransformers
- 12.21 Voltage Polarization Limitations
- 12.22 Dual Polarization for Ground Relaying
- 12.23 Ground Directional Sensing with Negative Sequence
- 12.24 Mutual Coupling and Ground Relaying
- 12.25 Ground Distance Relaying with Mutual Induction
- 12.26 Long EHV Series-Compensated Line Protection
- 12.27 Backup: Remote, Local, and Breaker Failure
- 12.28 Summary: Typical Protection for Lines
- 12.29 Practical Considerations of Line Protection
- Bibliography
-
Chapter 13 - Pilot Protection
- 13.1 Introduction
- 13.2 Pilot System Classifications
- 13.3 Protection Channel Classifications
- 13.4 Directional Comparison Blocking Pilot Systems
- 13.5 Directional Comparison Unblocking Pilot System
- 13.6 Directional Comparison Overreaching Transfer Trip Pilot Systems
- 13.7 Directional Comparison Underreaching Transfer Trip Pilot Systems
- 13.8 Phase Comparison: Pilot Wire Relaying (Wire Line Channels)
- 13.9 Phase Comparison: Audio Tone or Fiber-Optic Channels
- 13.10 Segregated Phase Comparison Pilot Systems
- 13.11 Single-Pole–Selective-Pole Pilot Systems
- 13.12 Directional Wave Comparison Systems
- 13.13 Digital Current Differential
- 13.14 Pilot Scheme Enhancements
- 13.15 Transfer Trip Systems
- 13.16 Communication Channels for Protection
- 13.17 Digital Line Current Differential Systems
- 13.18 Pilot Relaying: Operating Experiences
- 13.19 Summary
- Bibliography
- Appendix 13.1 Protection of Wire Line Pilot Circuits
-
Chapter 14 - Stability, Reclosing, Load Shedding, and Trip Circuit Design
- 14.1 Introduction
- 14.2 Electric Power and Power Transmission
- 14.3 Steady-State Operation and Stability
- 14.4 Transient Operation and Stability
- 14.5 System Swings and Protection
- 14.6 Out-of-Step Detection by Distance Relays
- 14.7 Automatic Line Reclosing
- 14.8 Distribution Feeder Reclosing
- 14.9 Subtransmission and Transmission-Line Reclosing
- 14.10 Reclosing on Lines with Transformers or Reactors
- 14.11 Automatic Synchronizing
- 14.12 Frequency Relaying for Load Shedding–Load Saving
- 14.13 Underfrequency Load-Shedding Design
- 14.14 Performance of Underfrequency Load-Shedding Schemes
- 14.15 Frequency Relaying for Industrial Systems
- 14.16 Voltage Collapse
- 14.17 Voltage Collapse Mitigating Techniques
- 14.18 Protection and Control Trip Circuits
- 14.19 Substation DC Systems
- 14.20 Trip Circuit Devices
- 14.21 Trip Circuit Design
- 14.22 Trip Circuit Monitoring and Alarms
- 14.23 Special Protection Schemes
- 14.24 Practical Considerations: Special Protection Schemes
- Bibliography
-
Chapter 15 - Microprocessor Applications and Substation Automation
- 15.1 Introduction
- 15.2 Microprocessor-Based Relay Designs
- 15.3 Programmable Logic Controllers
- 15.4 Application of Microprocessor Relays
- 15.5 Programming of Microprocessor Relaying
- 15.6 Attributes of Microprocessor-Based Relays
- 15.7 Protection Enhancements
- 15.8 Multifunctional Capability
- 15.9 Wiring Simplification
- 15.10 Event Reports
- 15.11 Commissioning and Periodic Testing
- 15.12 Setting Specifications and Documentation
- 15.13 Fault Location
- 15.14 Power System Automation
- 15.15 Practical Observations: Microprocessor Relay Application
- Bibliography
-
Chapter 16 - Improving Protective System Performance
- 16.1 Performance Measurement Techniques
- 16.2 Measuring Protective System Performance
- 16.3 Analyzing Protective System Misoperations
- 16.4 NERC Standard PRC-004
- 16.5 Procedures for Implementing PRC-004
- 16.6 Tools for Analyzing Power System Events
- 16.7 Overview of Major Power Outages
- 16.8 Relay Setting Loadability
- 16.9 NERC Standard PRC-023
- 16.10 Loadability Limits on Non-BES Lines
- 16.11 Generator Trips during Disturbances
- 16.12 Protection System Maintenance
- 16.13 Grid Automation: Protection Aspects
- 16.14 Summary
- Bibliography
- Chapter 17 - Problems
Product information
- Title: Protective Relaying, 4th Edition
- Author(s):
- Release date: February 2014
- Publisher(s): CRC Press
- ISBN: 9781498760003
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