## Description

The voltage stability of electric power systems presents a clear description of voltage instability and collapse phenomena. It proposes a uniform and coherent theoretical framework for analysis and covers the most modern methods. The book describes practical methods that can be used for voltage safety assessment and offers a variety of examples. This is a first attempt to condense technical documents and reports on this topic into a unique; coherent and theoretically sound presentation.

The transmission; generation and load aspects of the voltage instability problem are dealt with in detail; and an integral energy system model is developed and explained for use in voltage stability analysis. The notions and concepts of the theory of nonlinear systems are presented in a tutorial way for the use of those new in the field. The analyzes of load capacity; sensitivity and bifurcation of voltage stability are introduced and discussed in depth. Voltage instability mechanisms are classified and examined thoroughly; along with countermeasures that can be used to avoid them. In addition; voltage safety criteria and methods are reviewed; analyzed and illustrated through realistic computer results.

Voltage stability is a relatively recent and challenging problem in power system engineering. It is gaining importance as the tendency to operate energy systems closer to its limits continues to increase.

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