Electric Power Systems

by Weedy, B. M.; Cory, B. J.; Jenkins, N.; Ekanayake, Janaka B.; Strbac, Goran

• ISBN13: 9780470682685
• ISBN10: 047068268X
• Edition: 5th
• Format: Hardcover
• Copyright: 2012-12-26
• Publisher: Wiley

Summary

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.

Author Biography

Nick Jenkins, Cardiff University, UK
Nick is a Professor at the Cardiff School of Engineering. He is also the Director of the Centre for Integrated Renewable Energy Generation and Supply (CIREGS) at Cardiff University and is a special advisor to a House of Commons Select Committee (Innovation, Universities and Skills) in regard to their enquiries into Renewable Energy-Generation Technologies. He has set the Engineering Council examination on Power Systems for ten years.

Goran Strbac, Imperial College, London, UK
Goran is Professor of Electrical Energy Systems at Imperial College, London. He is also the Director of the DTI Centre for Distributed Generation and Sustainable Electrical Energy, the Convener of CIGRE International Working Group on Economics of Integration of Distributed Generation and a member of the Executive Team of the IEE Professional Network on Power Trading and Control. He is a co-author of 3 books and has published more than 100 scientific papers.

Table of Contents

Preface to First Edition	p. ix
Preface to Third Edition	p. xi
Preface to Third, Revised Edition	p. xiii
Preface to Fourth Edition	p. xv
Preface to Fifth Edition	p. xvi
Symbols	p. xvii
Introduction	p. 1
History
Characteristics Influencing Generation and Transmission
Operation of Generators
Energy Conversion
Renewable Energy Sources
Energy Storage
Environmental Aspects of Electrical Energy
Transmission and Distribution Systems
Utilization Problems
Basic Concepts
Three-Phase Systems
Three-Phase Transformers
Active and Reactive Power
The Per-Unit System
Power Transfer and Reactive Power
Harmonics in Three-Phase Systems
Useful Network Theory Problems
Components of a Power System
Introduction
Synchronous Machines
Equivalent Circuit Under Balanced Short-Circuit Conditions
Synchronous Generators in Parallel
The Operation of a Generator on Infinite Busbars
Automatic Voltage Regulators (AVRs)
Lines, Cables, and Transformers
Transformers
Voltage Characteristics of Loads Problems
Control of Power and Frequency
Introduction
The Turbine Governor
Control Loops
Division of Load between Generators
The Power-Frequency Characteristic of an Interconnected System
System Connected by Lines of Relatively Small Capacity Problems
Control of Voltage and Reactive Power
Introduction
The Generation and Absorption of Reactive Power
Relation Between Voltage, Power, and Reactive Power at a Node
Methods of Voltage Control: (i) Injection of Reactive Power
Methods of Voltage Control: (ii) Tap-Changing Transformers
Combined Use of Tap-Changing Transformers and Reactive-Power Injection
Phase shift trasnformer
Voltage Collapse
Voltage Control in Distribution Networks
Long Lines
General System Considerations Problems
Load Flows
Introduction
Circuit analysis versus load flow analysis
Gauss Siedal method
Load flows in radial and simple loop networks
Load flows in Large Systems
Example of a Complex Load Flow
Computer simulations Problems
Fault Analysis
Introduction
Calculation of Three-Phase Balanced Fault Currents
Method of Symmetrical Components
Representation of Plant in the Phase-Sequence Networks
Types of Fault
Fault Levels in a Typical System
Power in Symmetrical Components
Systematic Methods for Fault Analysis in Large Networks
Neutral Grounding
Interference with Communication Circuits-Electromagnetic Compatibility (EMC) Problems
System Stability
Introduction
Equation of Motion of a Rotating Machine
Steady-State Stability
Transient Stability
Transient Stability-Consideration of Time
Transient Stability Calculations by Computer
Dynamic or small signal stability
Stability of Loads Leading to Voltage Collapse
Further Aspects
Multimachine Systems
Energy-Type Functions
Improvement of stability Problems
Direct-Current Transmission
Introduction
Current Source and Voltage Source Converters
Semi-conductor Valves for High Voltage DC Converters
Current Source h.v.d.c
Voltage Source h.v.d.c. Problems
Overvoltages and Insulation Requirements
Introduction
Generation of Overvoltages
Protection Against Overvoltages
Insulation Coordination
Propagation of Surges
Determination of System Voltages Produced by Travelling Surges
Electromagnetic Transient Program (EMTP) Problems
Substations and Protection
Introduction
Switchgear
Qualities Required of Protection
Components of Protective Schemes
Protection Systems
Distance Protection
Unit Protection Schemes
Generator Protection
Transformer Protection
Feeder Protection
System Monitoring and Control
System Security and Emergency Control Problems
Fundamentals of the Economics of Operation and Planning of Electricity Systems
Economic Operation of Generation Systems
Fundamental principles of Generation System Planning
Economic Operation of Transmission Systems
Fundamental principles of Transmission System Planning
Distribution and Transmission Network security considerations
Drivers for change Problems
Synchronous Machine Reactances
Typical Transformer Impedances
Typical Overhead Line Parameters Bibliography and Further Reading
Index
Table of Contents provided by Publisher. All Rights Reserved.