Computational Techniques for Voltage Stability Assessment an

This book is intended to present bifurcaTIon and conTInuaTIon based computaTIonal

techniques for voltage stability assessment and control.

Chapters 1 and 2 provide background material for this book. Chapter 2 reviews

various aspects of bifurcation phenomena and includes numerical

techniques that can detect the bifurcation points. Chapter 3 discusses the

application of continuation methods to power system voltage stability and

provides extensive coverage on continuation power flow. Chapter 4 presents

general sensitivity techniques available in the literature that includes

margin sensitivity. Chapter 5 introduces voltage stability margin boundary

tracing. This chapter also discusses application of continuation power flow

for ATC. Chapter 6 finally presents time domain techniques that can capture

short as well as long term time scales involved in voltage stability.

Decoupled time domain simulation is introduced in this chapter. Basic

steps involved in various methods in each chapter are first demonstrated

through a two bus example for better understanding of these techniques.

I am grateful to Prof Pai, the series editor, who encouraged me and helped

me to write this book.

I would like to acknowledge the help from my previous and current graduate

students who helped me directly or indirectly in many ways to organize

this book. In general would like to thank Srinivasu Battula, Qin Wang,

Zheng Zhou, Gang Shen, Cheng Luo and Ashutosh Tiwari. In particular , I

would like to acknowledge contributions of Colin Christy (for chapter 3) ,

Byongjun Lee (for chapter2) , Bo Long (for chapters 2,3 and 4) , Yuan

Zhou (for chapters 3 and 5), Geng Wang (for chapter 5) and Dan Yang (for

chapter 6).

I would also like to acknowledge IEEE and Sadhana for some of the figures

and material I borrowed from my papers in these journals.

Finally I thank my wife Uma for her continued support and encouragement.