On the validity of local approximations of the power system loadability surface
2011 (English)In: IEEE Transactions on Power Systems, ISSN 0885-8950, Vol. 26, no 4, 2143-2153 p.Article in journal (Refereed) Published
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 makes the loadability surface nonsmooth. This makes the use of local approximations limited and calls for a method for estimating the distance to a nonsmooth part of the surface. This paper suggests a method for calculating the distance from a point on the loadability surface to the closest point of nonsmoothness of the loadability surface.
Place, publisher, year, edition, pages
2011. Vol. 26, no 4, 2143-2153 p.
Terms—Corner point, loadability surface, saddle-node bifurcation, switching loadability limit, voltage stability assessment
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-41979DOI: 10.1109/TPWRS.2011.2115259ISI: 000298784500040ScopusID: 2-s2.0-80054935524OAI: oai:DiVA.org:kth-41979DiVA: diva2:445733
QC 201112212011-10-042011-10-042012-02-14Bibliographically approved