Transformer tap setting observability in state estimation

Korres, GN; Katsikas, PJ; Contaxis, GC

dc.contributor.author	Korres, GN	en
dc.contributor.author	Katsikas, PJ	en
dc.contributor.author	Contaxis, GC	en
dc.date.accessioned	2014-03-01T01:21:39Z
dc.date.available	2014-03-01T01:21:39Z
dc.date.issued	2004	en
dc.identifier.issn	0885-8950	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16299
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.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Algorithms	en
dc.subject.other	Angle measurement	en
dc.subject.other	Observability	en
dc.subject.other	State estimation	en
dc.subject.other	Phase shift transformer	en
dc.subject.other	Tap setting estimation	en
dc.subject.other	Tap setting observability	en
dc.subject.other	Electric transformers	en
dc.title	Transformer tap setting observability in state estimation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TPWRS.2003.821629	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TPWRS.2003.821629	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	In conventional state estimation, transformer tap settings are treated as fixed network parameters. This may reduce the accuracy of state estimation algorithm, when a tap measurement is in error or an unmeasured tap is unknown. This paper presents a numerical observability analysis algorithm for 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, by introducing one fictitious bus and one fictitious branch for each transformer with tap estimation enabled. For an unobservable system, observable islands are determined and additional measurements are directly provided for placement. Test results are presented.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Power Systems	en
dc.identifier.doi	10.1109/TPWRS.2003.821629	en
dc.identifier.isi	ISI:000221283300001	en
dc.identifier.volume	19	en
dc.identifier.issue	2	en
dc.identifier.spage	699	en
dc.identifier.epage	706	en