Uses real world case studies to present the key technologies of design and application of the synchronous generator excitation system
This book systematically introduces the important technologies of design and application of the synchronous generator excitation system, including the three-phase bridge rectifier circuit, diode rectifier for separate excitation, brushless excitation system and the static self-stimulation excitation system. It fuses discussions on specific topics and basic theories, providing a detailed description of the theories essential for synchronous generators in the analysis of excitation systems.
Design and Application of Modern Synchronous Generator Excitation Systems provides a cutting-edge examination of excitation system, addressing conventional hydro-turbines, pumped storage units, steam turbines, and nuclear power units. It looks at the features and performance of the excitation system of the 700MW hydro-turbine deployed at the Three Gorges Hydropower Plant spanning the Yangtze River in China, as well as the working principle and start-up procedure of the static frequency converter (SFC) of pumped storage units. It also expounds on the composition of the excitation transformer, power rectifier, de-excitation equipment, and automatic excitation regulator--in addition to the performance features of the excitation system of conventional 600/1000MW turbines and the excitation system of the 1000MW nuclear power unit.
* Presents cutting-edge technologies of the excitation system from a unique engineering perspective
* Offers broad appeal to power system engineers who require a better understanding of excitation systems
* Addresses hydro-turbines, pumped storage units, steam turbines, and nuclear power units
* Provides an interdisciplinary examination of a range of applications
* Written by a senior expert in the area of excitation systems
Written by an author with over 50 years' experience, Design and Application of Modern Synchronous Generator Excitation Systems is an excellent text that offers an interdisciplinary exposition for professionals, researchers, and academics alike.
Autorentext
Jicheng Li, Professor, is Senior Engineer and Consultant Research Fellow of the National Key Laboratory of Power Systems, Tsinghua University, China. He is one of the expert panel members for the excitation system bid evaluation for the major hydropower projects represented by the Three Gorges, Longtan, Jinghong, and Lawaxi hydropower plants in China.
Inhalt
About the Author xxi
Foreword xxiii
Preface xxvii
Introduction xxix
Acknowledgement xxxi
1 Evolution and Development of Excitation Control 1
1.1 Overview 1
1.2 Evolution of Excitation Control 1
1.3 Linear Multivariable Total Controller 11
1.4 Nonlinear Multivariable Excitation Controller 20
1.5 Power System Voltage Regulator (PSVR) 25
2 Characteristics of Synchronous Generator 35
2.1 Electromotive Force Phasor Diagram of Synchronous Generator 35
2.2 Electromagnetic Power and Power Angle Characteristic of Synchronous Generator 38
2.3 Operating Capacity Characteristic Curve of Synchronous Generator 41
2.4 Influence of External Reactance on Operating Capacity Characteristic Curve 45
2.5 Operating Characteristic Curves of Generator 50
2.6 Transient Characteristics of Synchronous Generator 54
3 Effect of Excitation Regulation on Power System Stability 67
3.1 Definition and Classification of Power System Stability 67
3.2 Criterion of Stability Level 68
3.3 Effects of Excitation Regulation on Power System Stability 68
4 Static and Transient State Characteristics of Excitation Systems 77
4.1 Static Characteristics of Excitation System 77
4.2 Ratio and Coefficient of Generator Voltage to Reactive Current of Generator 81
4.3 Transient State Characteristics of Excitation System 87
4.4 Stability Analysis of Excitation System 94
5 Control Law and Mathematical Model of Excitation System 97
5.1 Basic Control Law of Excitation System 97
5.2 Mathematical Model of the Excitation System 108
5.3 Mathematical Model of Excitation Control Unit 118
5.4 Parameter Setting of Excitation System 124
6 Basic Characteristics of Three-Phase Bridge Rectifier Circuit 137
6.1 Overview 137
6.2 Operating Principle of Three-Phase Bridge Rectifier 137
6.3 Type I Commutation State 139
6.4 Commutation Angle 144
6.5 Average Rectified Voltage 144
6.6 Instantaneous Rectified Voltage Value 147
6.7 Effective Element Current Value 147
6.8 Fundamental Wave and Harmonic Value for Alternating Current 152
6.9 Power Factor of Rectifying Device 156
6.10 Type III Commutation State 161
6.11 Type II Commutation State 167
6.12 External Characteristic Curve for Rectifier 168
6.13 Operating Principle of Three-Phase Bridge Inverter Circuit 170
7 Excitation System for Separately Excited Static Diode Rectifier 175
7.1 Harmonic Analysis for Alternating Current 175
7.2 Non-distortion Sinusoidal Potential and Equivalent Commutating Reactance 177
7.3 Expression for Commutation Angle , Load Resistance rf, and Commutating Reactance X 182
7.4 Rectified Voltage Ratio 𝛽u and Rectified Current Ratio 𝛽i 184
7.5 Steady-State Calculations for AC Exciter with Rectifier Load 186
7.6 General External Characteristics of Exciter 189
7.7 Transient State Process of AC Exciter with Rectifier Load 191
7.8 Simplified Transient Mathematical Model of AC Exciter with Rectifier Load 193
7.9 Transient State Process of Excitation System in Case of Small Deviation Change in Generator Excitation Current 196
7.10 Influence of Diode Rectifier on Time Constant of Generator Excitation Loop 200
7.11 Excitation Voltage Response for AC Exciter with Rectifier Load 201
7.12 Short-Circuit Current Calculations for AC Exciter 205
7.13 Calculations for AC Rated Parameters and Forced Excitation Parameters 211
8 Brushless Excitation System 215
8.1 Evolution of Brushless Excitation System 215
8.2 Technical Specifications for Brushless Excitation System 219
8.3 Composition of Brushless Excitation System 221
8.4 Voltage Response Cha...