Power system voltage stability is one of the challenging problems faced by the utilities. Innovative methods and solutions are required to evaluate the voltage stability of a power system and implement suitable strategies to enhance the robustness of the power system against voltage stability problems. This is the motivation behind the research carried out as a part of the PhD program and presented in this dissertation. The first two chapters of the book discuss the phenomenon of voltage instability in brief, and presents an overview of the existing work. Next two chapters present the details...