Quality of power supply is now a major issue worldwide making harmonic analysis an essential element in power system planning and design. Power System Harmonic Analysis presents novel analytical and modelling tools for the assessment of components and systems, and their interactions at harmonic frequencies. The recent proliferation of power electronic equipment is a significant source of harmonic distortion and the authors present effective techniques to tackle this real engineering problem. Features include:

• Introduction to the main harmonic modelling philosophies
• Analysis of the behaviour of harmonic sources, stressing the interaction of ac/dc converters with the power system
• Information showing the reader how to predict accurately the levels of voltage and current harmonics throughout the power system
• Explanation of the techniques currently used for the prediction of harmonic content and the more advanced algorithms recently developed to determine both characteristic and uncharacteristic harmonic levels
• Description of methods to facilitate accurate assessment of harmonic sources and precise harmonic flow analysis
• Practical guidance on the prediction of unstable conditions and uncharacteristic harmonics

The changing structure of the electric utility industry has had a significant impact on power system design and operation. In particular, the incorporation of flexible a.c. transmission system (FACTS) devices and high voltage direct current (HVDC) links into conventional computational programs presents new challenges in power system modelling. Responding to these changes, Computer Modelling of Electrical Power Systems, Second Edition presents modern analysis tools for the design and improvement of power system performance.
This fully revised and updated edition features:

• The incorporation of HVDC and FACTS devices in power flow and system stability with detailed descriptions of the relevant algorithms.
• Extensive coverage of the EMTP (electromagnetic transient program) method - a key development in power system simulation.
• The use and impact of personal computers in power system simulation, with emphasis on efficient computational techniques for interactive work.

In this book the authors describe the main computer modelling techniques that, having gained universal acceptance, constitute the basic framework of modern power system analysis. Some basic knowledge of power system theory, matrix analysis and numerical techniques is presumed, although several appendices and many references have been included to help the uninitiated to pick up the relevant background. An introductory chapter describes the main computational and transmission system developments which influence modern power system analysis. This is followed by three chapters on the subject of load or power flow with emphasis on the Newton-Raphson fast-decoupled algorithm. Chapter 5 describes the subject of a.c. system faults. The next two chapters deal with the electromechanical behaviour of power systems. Chapter 6 describes the basic dynamic models of power system plant and their use in multi-machine transient stability analysis. More advanced dynamic models and a quasi-steady-state representation of large converter plant and h.v.d.c. transmission are developed in Chapter 7. A description of the Electromagnetic Transients Program with the marriage between "Bergeron's and Trapezoidal" methods is presented in Chapter 8, and a generalization of the multi-phase models described in Chapter 3 is used in Chapter 9 as the framework for harmonic flow analysis. Chapter 10 describes the state of the art in power system security and optimization analysis. Finally, Chapter 11 deals with recent advances made on the subject of interactive power system analysis and developments in computer graphics with emphasis on the use of personal computers.