Dynamic Research On Voltage Stability

For a long time, the theory and analysis method of power system stability usually focused on the rotor angle stability, clarified the mechanism of angle instability and developed a mature analysis method and control measure. But recent years, there were many voltage collapse accidents caused by voltage instability in several countries of the world which result in power cut in large areas and for a long time. The issue brought extensive concern around the electric power engineering and academic circles, and promoted the research of voltage stability. Voltage stability problem become one of the important subjects in modern power system research. The research of voltage stability early belonged to static category, the research focused on probing into the mechanism of voltage instability or obtaining voltage stability limit base on flow equation, it usually didn't consider the nonlinearity of power system. As the development of research, people realize the nonlinearity of power system gradually, stability problem belongs to a dynamic category and voltage instability or voltage collapse is a dynamic process essentially. The developed mechanism of voltage instability could be open out only consider...