A gram matrix-based method for observability restoration

Korres, GN

dc.contributor.author	Korres, GN	en
dc.date.accessioned	2014-03-01T01:34:53Z
dc.date.available	2014-03-01T01:34:53Z
dc.date.issued	2011	en
dc.identifier.issn	08858950	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20919
dc.subject	Gram matrix	en
dc.subject	measurement placement	en
dc.subject	observability restoration	en
dc.subject	observable islands	en
dc.subject	reduced Jacobian	en
dc.subject.other	Boundary measurements	en
dc.subject.other	Computationally efficient	en
dc.subject.other	Gram matrices	en
dc.subject.other	Jacobians	en
dc.subject.other	Large system	en
dc.subject.other	measurement placement	en
dc.subject.other	Numerical algorithms	en
dc.subject.other	observable islands	en
dc.subject.other	Triangular factors	en
dc.subject.other	Unobservable	en
dc.subject.other	Algorithms	en
dc.subject.other	Numerical methods	en
dc.subject.other	Observability	en
dc.subject.other	Restoration	en
dc.subject.other	Jacobian matrices	en
dc.title	A gram matrix-based method for observability restoration	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TPWRS.2011.2126290	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TPWRS.2011.2126290	en
heal.identifier.secondary	5742725	en
heal.publicationDate	2011	en
heal.abstract	This letter presents an improved numerical algorithm for observability restoration of unobservable systems. The algorithm provides a minimal set of measurements to render the system observable, by checking the pivots in the triangular factors of a Gram matrix associated with a Jacobian matrix corresponding to a reduced network and measurement set. The dimension of the Gram matrix is equal to the number of existing and candidate boundary measurements at observable islands, that is relatively low even for very large systems. That makes the proposed method fast and computationally efficient. An example is given to illustrate the details of the proposed method. © 2006 IEEE.	en
heal.journalName	IEEE Transactions on Power Systems	en
dc.identifier.doi	10.1109/TPWRS.2011.2126290	en
dc.identifier.volume	26	en
dc.identifier.issue	4	en
dc.identifier.spage	2569	en
dc.identifier.epage	2571	en