With the competitive market environment in which power systems at present operate, the need for optimal system operation and at the same time maintaining system security is on the increase, and represents a challenge to system operators. With this acknowledgement, the book has first the focus on the steady-state models of a power system together with its elements, including FACTS devices such as SVC, STATCOM and UPFC. The comprehensive steady-state model of power systems with FACTS devices provides the foundation for the second part of the book in the field of secondary control ...