VOLTAGE INSTABILITY - MECHANISMS AND CONTROL STRATEGIES

One of the main objectives in operating an electric power system is to maintain a proper voltage level throughout a system. Failure to do so can lead to equipment damage and blackout. The article discusses the nonlinear aspects of power systems, with emphasis on voltage instabili ty. It provides an overview of the state-of-the-art on the analysis an d control of voltage dynamics. Dynamic mechanisms and control strategi es are discussed from both theoretical and practical standpoints. The remedial controls implemented in the Puget Sound region of the Pacific Northwest indicate the practical significance of the research area.