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In this paper we propose a novel performance index and a multi-layered information structure for monitoring potential quasi-static voltage problems in electrical power systems. The proposed performance index is based on the sensitivity of the smallest singular value of the power flow Jacobian matrix with respect to the corresponding system load level. This performance index is computed at different...
This paper is motivated by the basic need to develop methods for on-line detection of abnormal conditions in large electric power systems. In order to implement truly effective near-automated tools for this purpose, it is necessary to overcome several problems such as: (1) excessive computational complexity; (b) unacceptable approximations; and, (3) dependence on full state measurements. In an attempt...
In this paper we observe that recent voltage problems, including August 2003 blackout, are often caused by the lack of adequate and timely information. We study the type of information essential to avoiding such problems in the future. The needed information concerns (a) choice of a performance index characterizing problems of interest; (b) information structure necessary to monitor the performance...
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