Observability analysis and estimation of transformer tap settings

Katsikas, PJ; Korres, GN; Contaxis, GC

dc.contributor.author	Katsikas, PJ	en
dc.contributor.author	Korres, GN	en
dc.contributor.author	Contaxis, GC	en
dc.date.accessioned	2014-03-01T02:42:18Z
dc.date.available	2014-03-01T02:42:18Z
dc.date.issued	2003	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30926
dc.subject	Phase-shift transformer	en
dc.subject	Tap setting estimation	en
dc.subject	Tap setting observability	en
dc.subject	Voltage transformer	en
dc.subject.other	Frame of reference	en
dc.subject.other	Multiple measurements	en
dc.subject.other	Non-iterative	en
dc.subject.other	Numerical algorithms	en
dc.subject.other	Observability analysis	en
dc.subject.other	Phase-shifting transformer	en
dc.subject.other	Pseudo measurements	en
dc.subject.other	State variables	en
dc.subject.other	Test systems	en
dc.subject.other	Unobservable	en
dc.subject.other	Voltage transformer	en
dc.subject.other	Algorithms	en
dc.subject.other	Phase shift	en
dc.subject.other	Observability	en
dc.title	Observability analysis and estimation of transformer tap settings	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/PTC.2003.1304123	en
heal.identifier.secondary	http://dx.doi.org/10.1109/PTC.2003.1304123	en
heal.identifier.secondary	1304123	en
heal.publicationDate	2003	en
heal.abstract	This paper presents a numerical algorithm for observability analysis in a state estimation model which treats transformer tap settings as state variables and provides for turns ratio and phase-shift angle measurements. The proposed model is transformed to a conventional node frame of reference formulation, by introducing two ficticious buses and branches and a pair of zero active and reactive pseudo measurements for each transformer, whose tap is modeled as a state variable. For an unobservable system, observable islands are determined and multiple measurement placement is accomplished in a noniterative manner. The method is applied to both voltage and phase-shifting transformers. The method is illustrated by a test system. © 2003 IEEE.	en
heal.journalName	2003 IEEE Bologna PowerTech - Conference Proceedings	en
dc.identifier.doi	10.1109/PTC.2003.1304123	en
dc.identifier.volume	1	en
dc.identifier.spage	133	en
dc.identifier.epage	139	en