An integer-arithmetic algorithm for observability analysis of systems with SCADA and PMU measurements

Korres, GN

dc.contributor.author	Korres, GN	en
dc.date.accessioned	2014-03-01T01:35:12Z
dc.date.available	2014-03-01T01:35:12Z
dc.date.issued	2011	en
dc.identifier.issn	0378-7796	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20982
dc.subject	Fraction-free Gaussian elimination	en
dc.subject	Gain matrix	en
dc.subject	Gram matrix	en
dc.subject	Measurement placement	en
dc.subject	Observable islands	en
dc.subject	Standard Gaussian elimination	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Gain matrices	en
dc.subject.other	Gaussian elimination	en
dc.subject.other	Gram matrix	en
dc.subject.other	Measurement placement	en
dc.subject.other	Observable islands	en
dc.subject.other	Algorithms	en
dc.subject.other	Buses	en
dc.subject.other	Gaussian distribution	en
dc.subject.other	Jacobian matrices	en
dc.subject.other	Numerical methods	en
dc.subject.other	Observability	en
dc.subject.other	SCADA systems	en
dc.title	An integer-arithmetic algorithm for observability analysis of systems with SCADA and PMU measurements	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.epsr.2011.02.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.epsr.2011.02.005	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	This paper presents an efficient numerical method for observability analysis of systems including both conventional (SCADA) measurements and synchronized phasor (PMU) measurements, using integer preserving Gaussian elimination of integer coefficient matrices. The observable islands are identified in a noniterative manner, by performing backward substitutions on the integer triangular factors of the integer gain matrix. Multiple placement of conventional and phasor measurements for a system that is found to be unobservable is done by a direct method, using the integer triangular factors of a Gram matrix associated with a reduced size Jacobian matrix. Since all computations performed are exact, no round-off error, numerical instability, or zero identification problems occur. The IEEE 14-bus system is used to illustrate the steps of the proposed method. Test results for the IEEE 300-bus and the FRCC 3949-bus systems are provided to demonstrate the features of the proposed algorithms. (C) 2011 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Electric Power Systems Research	en
dc.identifier.doi	10.1016/j.epsr.2011.02.005	en
dc.identifier.isi	ISI:000291774000019	en
dc.identifier.volume	81	en
dc.identifier.issue	7	en
dc.identifier.spage	1388	en
dc.identifier.epage	1402	en