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Voltage instability may occur from a variety of phenomena. Two of the most frequent are: (a) voltage recovery following typical faults on a power system and (b) voltage collapse during transient swings of the power system. We propose approaches to deal with these phenomena consisting of identifying the phenomena involved and proper response of control devices in the system such as dynamic VAR sources...
Expert-system-based approaches to complex computational procedures of transients in power systems are desirable because power systems contain complex and nonlinear elements. We propose the use of symbolically-aided modeling as the basis for the design of expert transient simulators. The symbolic approaches work well when (a) the user interface is "symbolized" and (b) the underlying computational...
This paper describes a methodology to evaluate the reliability of bulk power systems. The method encompasses the systematic enumeration of contingencies and the evaluation of their effects on the system over a range of system load levels. Contingencies and electric load states are described with Markov models. Reliability indices are computed using these models. Both adequacy and a simplified security...
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