Risk-based security assessment for operating electric power systems

Abstract

This manuscript has been reproduced from the microfOm master. UMI films the text directly from the origmal or copy submitted. Thus, some thesis and dissertation copies are in typewriter &ce, while others may be from any type of computer printer.The quality of this reproduction is depoident upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adverse^ affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these wiU be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, b^inning at the upper left-hand comer and continuing from left to right in equal sections with small overiaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. Photographs included in the original manuscript have been reproduced xerographically in this copy. Sgher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order.

Comparison between deterministic and probabilistic approaches in power system security assessment

“…A fourth influence suggested by equation (43) is that of the uncertainty in operating conditions. Although we have excluded this influence from our present study, we have noted its influence in other studies [15]. This influence is especially important when small variations in operating conditions cause large deviations in performance, an effect that is particularly noticeable in voltage analysis.…”

Transient stability assessment and decision-making using risk

“…It would also be significant to combine all risks indices into one composite risk index, as is suggested in [99], where this composite risk could be used to plot contours of equal risk in risk-based nomograms and to incorporated in a decision support tool based on the concepts developed in this dissertation. At the same time, it would also be necessary to determine composite variance.…”