The definitive textbook for Power Systems students, providing a grounding in essential power system theory while also focusing on practical power engineering applications. Electric Power Systems has been an essential book in power systems engineering for over thirty years. Bringing the content firmly up-to-date whilst still retaining the flavour of Weedy's extremely popular original, this Fifth Edition has been revised by experts Goran Strbac and Nick Jenkins. This wide-ranging text still covers all of the fundamental power systems subjects but is now expanded to cover increasingly important topics like climate change and renewable power generation. Updated material includes an analysis of today's markets and an examination of the current economic state of power generation. The physical limits of power systems equipment - currently being tested by the huge demand for power - is explored, and greater attention is paid to power electronics, voltage source and power system components, amongst a host of other updates and revisions. * Supplies an updated chapter on power system economics and management issues and extended coverage of power system components. Also expanded information on power electronics and voltage source, including VSC HVDC and FACTS. * Updated to take into account the challenges posed by different world markets, and pays greater attention to up-to-date renewable power generation methods such as wind power. * Includes modernized presentation and greater use of examples to appeal to today's students, also retains the end of chapter questions to assist with the learning process. Also shows students how to apply calculation techniques.

InhaltsangabePreface to First Edition ix Preface to Third Edition xi Preface to Third, Revised Edition xiii Preface to Fourth Edition xv Preface to Fifth Edition xvi Symbols xvii 1 Introduction 1 1.1 History 1.2 Characteristics Influencing Generation and Transmission 1.3 Operation of Generators 1.4 Energy Conversion 1.5 Renewable Energy Sources 1.6 Energy Storage 1.7 Environmental Aspects of Electrical Energy 1.8 Transmission and Distribution Systems 1.9 Utilization Problems 2 Basic Concepts 2.1 ThreePhase Systems 2.2 ThreePhase Transformers 2.3 Active and Reactive Power 2.4 The PerUnit System 2.5 Power Transfer and Reactive Power 2.6 Harmonics in Three-Phase Systems 2.7 Useful Network Theory Problems 3 Components of a Power System 3.1 Introduction 3.2 Synchronous Machines 3.3 Equivalent Circuit Under Balanced Short-Circuit Conditions 3.4 Synchronous Generators in Parallel 3.5 The Operation of a Generator on Infinite Busbars 3.6 Automatic Voltage Regulators (AVRs) 3.7 Lines, Cables, and Transformers 3.8 Transformers 3.9 Voltage Characteristics of Loads Problems 4 Control of Power and Frequency 4.1 Introduction 4.2 The Turbine Governor 4.3 Control Loops 4.4 Division of Load between Generators 4.5 The Power-Frequency Characteristic of an Interconnected System 4.6 System Connected by Lines of Relatively Small Capacity Problems 5, Control of Voltage and Reactive Power 5.1 Introduction 5.2 The Generation and Absorption of Reactive Power 5.3 Relation Between Voltage, Power, and Reactive Power at a Node 5.4 Methods of Voltage Control: (i) Injection of Reactive Power 5.5 Methods of Voltage Control: (ii) TapChanging Transformers 5.6 Combined Use of Tap-Changing Transformers and ReactivePower Injection 5.7 Phase shift trasnformer 5.8 Voltage Collapse 5.9 Voltage Control in Distribution Networks 5.10 Long Lines 5.11 General System Considerations Problems 6 Load Flows 6.1 Introduction 6.2 Circuit analysis versus load flow analysis 6.3 Gauss Siedal method 6.4 Load flows in radial and simple loop networks 6.4 Load flows in Large Systems 6.5 Example of a Complex Load Flow 6.6 Computer simulations Problems 7 Fault Analysis 7.1 Introduction 7.2 Calculation of Three-Phase Balanced Fault Currents 7.3 Method of Symmetrical Components 7.4 Representation of Plant in the Phase-Sequence Networks 7.5 Types of Fault 7.6 Fault Levels in a Typical System 7.7 Power in Symmetrical Components 7.8 Systematic Methods for Fault Analysis in Large Networks 7.9 Neutral Grounding 7.11 Interference with Communication Circuits--Electromagnetic Compatibility (EMC) Problems 8 System Stability 8.1 Introduction 8.2 Equation of Motion of a Rotating Machine 8.3 SteadyState Stability 8.4 Transient Stability 8.5 Transient Stability--Consideration of Time 8.6 Transient Stability Calculations by Computer 8.7 Dynamic or small signal stability 8.8 Stability of Loads Leading to Voltage Collapse 8.9 Further Aspects 8.10 Multimachine Systems 8.11 EnergyType Functions 8.12 Improvement of stability Problems 9 DirectCurrent Transmission 9.1 Introduction 9.2 Current Source and Voltage Source Converters 9.3 Semiconductor Valves for High Voltage DC Converters 9.4 Current Source h.v.d.c. 9.5 Voltage Source h.v.d.c. Problems 10 Overvoltages and Insulation Requirements 10.1 Introduction 10.2 Generation of Overvoltages 10.3 Protection Against Overvoltages 10.4 Insulation Coordination 10.5 Propagation of Surges 10.6 Determination of System Voltages Produced by Travelling Surges 10.7 Electromagnetic Transient Program (EMTP) Problems 11 Substations and Protection 11.1 Introduction 11.2 Switchgear 11.3 Qualities Required of Protection 11.4 Componen

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