本书介绍了电力系统分析和设计的方法，可使学生对电力系统工程有关的广范围的课题有清楚的认识，特别是借助个人计算机，可使大学本科生对电力系统基本理论和方法得到充分的理解和训练。

本书的主要内容是介绍电力系统分析和设计的方法，使学生对有关电力系统工程的宽范围内的课题有清楚的认识，特别是可以借助个人计算机，使大学本科生充分地理解电力系统的基本理论和方法，并得到相应的训练。 本书的主要特点有： 1对于电气工程专业的大学生来说，本书内容十分全面，这是美国教材不同于我国教材之处。对于本书的内容，国内通常是分成几本教材来编写出版的，类似的教材如《电力系统分析》、《电力工程》、《电能系统基础》等都没有本书全面。 2编写内容新。本书是第3版，内容反映了电力系统领域内的最新问题和研究成果，包括电力市场环境下电力系统的一些问题。 3每章开始均有“案例研究”（Case Study）部分，介绍与本章学习内容有关的历史、最新进展等，并提出一些问题。例如，第6章“潮流”的案例研究介绍了可视化电网和潮流研究计算的简要历史。可视化电网是最新的研究成果，也是今后电力系统潮流计算、研究的方向。其中关于潮流管理、网络控制、电力市场环境下的线路阻塞、三维网络图、市场力等问题都是很新的。第13章“暂态稳定性”的案例研究讲述了美国的大停电，这能使学生更加明确学习本课程的意义，很能激发学生的学习兴趣。 4本书附有一张CD光盘，内容是“电力世界仿真器”（Power World Simulator）。Power World Simulator是一个优秀的软件包，能够处理任何规模的电力系统，在大学、公司、政府管理人员、电力市场人员等中被广泛使用。本书的CD在该软件平台上集成了计算例题、问题和课程设计，对学生学习及理解概念和方法很有帮助。 5每章都有丰富的习题和问题，有助于学生理解课程内容和基本概念。特别是书中还安排了6个课程设计（Design Project），如“设计电力系统规划”、“潮流/短路研究”等，学生可借助于Power World Simulator来完成这些设计。而在国内教学中，设计这一项基本被取消了。实际上，对于工科大学生来说，这是很重要的。本书中的设计（Design）内容，很值得国内教学借鉴。 本书两位作者都来自美国东北大学，该校在电力方面的教学和科学研究是比较优秀的。作者编写本书时，同时也吸收了其他院校的一些教学成果。 本书适合作为本科电力系统或电气工程专业，以及机电类专业“电气工程”相关课程的双语教学教材，也可作为相关专业研究生或电气工程师的参考书。 清华大学 周双喜 2004年5月

出版说明
序
Preface
List of Symbols. Units, and Notation
CHAPTER I Introduction
Case Study: Restructuring and Reregulation of the U.S. Electric Utility Industry
1.1 History of Electric Power Systems
1.2 Present and Future Trends
1.3 Electric Utility Industry Structure
1.4 Computers in Power System Engineering
1.5 PowerWofid Simulator
CHAPTER 2 Fundamentals
Case Study: Restructuring the Thin-Stretched Grid
2.1 Phasors
2.2 Instantaneous Power in Single-Phase ac Circuits
2.3 Complex Power
2.4 Network Equations
2.5 Balanced Three-Phase Circuits
2.6 Power in Balanced Three-Phase Circuits
2.7 Advantages of Balanced Three-Phase versus Single-Phase Systems
CHAPTER 3 Power Transformers
Case Study: How Electric Utilities Buy Quality When They Buy Transformers
3.1 The Ideal Transformer
3.2 Equivalent Circuits for Practical Transformers
3.3 The Per-Unit System
3.4 Three-Phase Transformer Connections and Phase Shift
3.5 Per. Unit Equivalent Circuits of Balanced Three-Phase Two-Winding Transformers
3.6 Three-Winding Transformers
3.7 Autotransformers
3.8 Transformers with Off-Nominal Turns Ratios
CHAPTER 4 Transmission-Line Parameters
Case Study: Special Report--Transmission Structures
4.1 Transmission Line Design Considerations
4.2 Resistance
4.3 Conductance
4.4 Inductance: Solid Cylindrical Conductor
4.5 Inductance: Single-Phase Two-Wire Line and Three-Phase Three-Wire Line with Equal Phase Spacing
4.6 tnductance: Composite Conductors, Unequal Phase Spacing, Bundled Conductors
4.7 Series Impedances: Three-Phase Line with Neutral Conductors and Earth Return
4.8 Electric Field and Voltage: Solid Cylindrical Conductor
4.9 Capacitance: Single-Phase Two-Wire Line and Three-Phase Three-Wire Line with Equal Phase Spacing
4.10 Capacitance: Stranded Conductors, Unequal Phase Spacing, Bundled Conductors
4.11 Shunt Admittances: Lines with Neutral Conductors and Earth Return
4.12 Electric Field Strength at Conductor Surfaces and at Ground Level
4.13 Parallel Circuit Three-Phase Lines
CHAPTER 5 Transmission Lines: Steady-State Operation
Case Study: FACTS Technology Development: An Update
5.1 Medium and Short Line Approximations
5.2 Transmission-Line Differential Equations
5.3 Equivalent π Circuit
5.4 Lossless Lines
5.5 Maximum Power Flow
5.6 Line Loadability
5.7 Reactive Compensation Techniques
CHAPTER 6 Power Flows
Case Study: Visualizing the Electric Grid
6.1 Direct Solutions to Linear Algebraic Equations: Gauss Elimination
6.2 Iterative Solutions to Linear Algebraic Equations: Jacobi and Gauss-Seidel
63 [terative Solutions to Nonlinear Algebraic Equations:Newton-Raphson
6.4 The Power-Flow Problem
6.5 Power-Flow Solution by Gauss-Seidel
6.6 Power-Flow Solution by Newton-Raphson
6.7 Control of Power Flow
6.8 Sparsity Techniques
6.9 Fast Decoupled Power Flow
Design Projects 1-5
CHAPTER 7 Symmetrical Faults
Case Study: The Problem of Arcing Faults in Low-Voltage Power Distribution Systems
7.1 Series R-L Circuit Transients
7.2 Three-Phase Short Circuit--Unloaded Synchronous Machine
7.3 Power System Three-Phase Short Circuits
7.4 Bus Impedance Matrix
7.5 Circuit Breaker and Fuse Selection
Design Project 4 (continued)
CHAPTER 8 Symmetrical Components
8.1 Definition of Symmetrical Components
8.2 Sequence Networks of Impedance Loads
8.3 SequenceNetworks of Series Impedances
8.4 Sequence Networks of Three-Phase Lines
8.5 Sequence Networks of Rotating Machines
8.6 Per-Unit Sequence Models of Three-Phase Two-Winding Transformers
8.7 Per-Unit Sequence Models of Three-Phase Three-Winding Transformers
8.8 Power in Sequence Networks
CHAPTER 9 Unsymmetrical Faults
Case Study: Fires at U.S. Utilities
9.1 System Representation
9.2 Single Line-to-Ground Fault
9.3 Line-to-Line Fault
9.4 Double Line-to-Ground Fault
9.5 Sequence Bus Impedance Matrices
Design Project 4 (continued)
Design Project 6
CHAPTER 10 System Protection
Case Study: Digital Relay Reports Verify Power System Models
10.1 System Protection Components
10.2 Instrument Transformers
10.30vercurrent Relays
10.4 Radial System Protection
10.5 Reclosers and Fuses
10.6 Directional Relays
10.7 Protection of Two-Source System with Directional Relays
10.8 Zones of Protection
10.9 Line Protection with Impedance (Distance) Relays
10.10 Differential Relays
10.11 Bus Protection with Differential Relays
10.12 Transformer Protection with Differential Relays
10.13 Pilot Relaying
10.14 Digital Relaying
CHAPTER 11 Power System Controls
Case Study: Meet the Emerging Transmission Market Segments
11.1 Generator-Voltage Control
11.2 Turbine-Governor Control
11.3 Load-Frequency Control
I 1.4 Economic Dispatch
11.5 Optimal Power Flow
CHAPTER 12 Transmission Lines: Transient Operation
Case Stud)#: Protecting Computer Systems Against Power Transients
Case Stud),: VariSTAR~ Type AZE Surge Arresters
12.1 Traveling Waves on Single-Phase Lossless Lines
12.2 Boundary Conditions for Single-Phase Lossless Lines
12.3 Bewley Lattice Diagram 570
12.4 Discrete-Time Models of Single-Phase Lossless Lines and Lumped RLC Elements
12.5 Lossy Lines
12.6 Multiconductor Lines
12.7 Power System Overvoltages
12.8 Insulation Coordination
CHAPTER 13 Transient Stability
Case Stud)#: The Great Blackout
13.1 The Swing Equation
13.2 Simplified Synchronous Machine Model and System Equivalents
13.3 The Equal-Area Criterion
13.4 Numerical Integration of the Swing Equation
13.5 Multimachine Stability
13.6 Design Methods for Improving Transient Stability
Appendix
Index
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