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Approximating the loadability surface in the presence of SNB-SLL corner points
KTH, School of Electrical Engineering (EES), Electric Power Systems.
2013 (English)In: Electric power systems research, ISSN 0378-7796, Vol. 96, 64-74 p.Article in journal (Refereed) Published
Abstract [en]

Power system voltage security assessment is generally applied by considering the power system loadability surface. For a large power system, the loadability surface is a complicated hyper-surface in parameter space, and local approximations are a necessity for any analysis. Unfortunately, inequality constraints due to for example generator overexitation limiters, and higher codimension bifurcations, make the loadability surface non-smooth. One situation that is particularly difficult to handle is when a saddle-node bifurcation surface intersects a switching loadability limit surface. In this article we intend to investigate how several local approximations can be combined to obtain an adequate approximation of the loadability surface near such intersections.

Place, publisher, year, edition, pages
2013. Vol. 96, 64-74 p.
Keyword [en]
Corner point, Load-flow feasibility, Saddle-node bifurcation, Switching loadability limit, Voltage stability assessment
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-118135DOI: 10.1016/j.epsr.2012.10.016ISI: 000315612100009ScopusID: 2-s2.0-84870652790OAI: diva2:605046

QC 20130213

Available from: 2013-02-13 Created: 2013-02-12 Last updated: 2013-04-04Bibliographically approved

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Perninge, Magnus
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