State estimation and bad data processing for systems including PMU and SCADA measurements

Korres, GN; Manousakis, NM

dc.contributor.author	Korres, GN	en
dc.contributor.author	Manousakis, NM	en
dc.date.accessioned	2014-03-01T01:37:07Z
dc.date.available	2014-03-01T01:37:07Z
dc.date.issued	2011	en
dc.identifier.issn	0378-7796	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21454
dc.subject	Bad data processing	en
dc.subject	Current phasor	en
dc.subject	Phasor measurement unit	en
dc.subject	State estimation	en
dc.subject	Voltage phasor	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Bad data	en
dc.subject.other	Bad data processing	en
dc.subject.other	Bus voltage	en
dc.subject.other	Current phasor	en
dc.subject.other	Error amplification	en
dc.subject.other	Loaded lines	en
dc.subject.other	Network bus	en
dc.subject.other	Non-linear	en
dc.subject.other	Normalized residuals	en
dc.subject.other	Numerical problems	en
dc.subject.other	Phasor measurement unit	en
dc.subject.other	Phasor measurements	en
dc.subject.other	Polar coordinate	en
dc.subject.other	Reactive power flow	en
dc.subject.other	Real time measurements	en
dc.subject.other	Rectangular coordinates	en
dc.subject.other	SCADA measurements	en
dc.subject.other	State Estimators	en
dc.subject.other	Synchronized measurement	en
dc.subject.other	Voltage phasor	en
dc.subject.other	Voltage phasors	en
dc.subject.other	Weighted least-squares estimators	en
dc.subject.other	Data handling	en
dc.subject.other	Estimation	en
dc.subject.other	Phase measurement	en
dc.subject.other	Reactive power	en
dc.subject.other	Real time systems	en
dc.subject.other	SCADA systems	en
dc.subject.other	State estimation	en
dc.subject.other	Units of measurement	en
dc.subject.other	Measurements	en
dc.title	State estimation and bad data processing for systems including PMU and SCADA measurements	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.epsr.2011.03.013	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.epsr.2011.03.013	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Conventional state estimators (SE) are based on real-time measurements, consisting of bus voltages and active and reactive power flows and injections, and estimate the voltage phasors of the network buses. Until recently, these measurements were obtained only through SCADA. With the advent of GPS synchronized measurements obtained by phasor measurement units (PMU), effective techniques are required to incorporate the extremely accurate PMU measurements into state estimation, in order to improve its performance and observability. This paper develops a non-linear weighted least squares estimator by modeling the current phasor measurements either in rectangular or in polar coordinates and compares the two approaches. Any numerical problems arised at flat start or for lightly loaded lines, are resolved. The error amplification, due to the current phasor measurement transformation from polar into rectangular coordinates, is also investigated. The normalized residual test is used to effectively identify any bad data in the conventional and phasor measurements. The proposed techniques are tested with the IEEE 14-bus system. (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.2011.03.013	en
dc.identifier.isi	ISI:000291774000032	en
dc.identifier.volume	81	en
dc.identifier.issue	7	en
dc.identifier.spage	1514	en
dc.identifier.epage	1524	en