Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements

Abstract It has been observed by the practicing engineers that the inclusion of measurements from phasor measurement units (PMUs), current measurements in particular, into the conventional state estimators (SEs), may deteriorate the numerical performance of the SEs in terms of convergence and accura...

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Autores principales:	Sanjeeb Kumar Mallik, Saikat Chakrabarti, Sri Niwas Singh
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Energy industries. Energy policy. Fuel trade HD9502-9502.5 Production of electric energy or power. Powerplants. Central stations TK1001-1841
Acceso en línea:	https://doaj.org/article/317292dc94ce41dea5f169e1464493bb
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spelling	oai:doaj.org-article:317292dc94ce41dea5f169e1464493bb2021-11-22T16:30:35ZAnalysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements2634-158110.1049/enc2.12026https://doaj.org/article/317292dc94ce41dea5f169e1464493bb2021-03-01T00:00:00Zhttps://doi.org/10.1049/enc2.12026https://doaj.org/toc/2634-1581Abstract It has been observed by the practicing engineers that the inclusion of measurements from phasor measurement units (PMUs), current measurements in particular, into the conventional state estimators (SEs), may deteriorate the numerical performance of the SEs in terms of convergence and accuracy. This paper analyzes the reason for such possible ill‐conditioning of the hybrid SEs that use both conventional and PMU measurements. It presents simplified analytical approaches to identify what causes such ill‐conditioning when PMU measurements are used. The condition number of SE gain matrix may vary depending on the number of the PMUs and its placement in the network. It has been identified that the large difference in weights that are allocated to the traditional measurements and PMU measurements is the main reason of the ill‐conditioning of the hybrid SEs.Sanjeeb Kumar MallikSaikat ChakrabartiSri Niwas SinghWileyarticleEnergy industries. Energy policy. Fuel tradeHD9502-9502.5Production of electric energy or power. Powerplants. Central stationsTK1001-1841ENEnergy Conversion and Economics, Vol 2, Iss 1, Pp 35-44 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Energy industries. Energy policy. Fuel trade HD9502-9502.5 Production of electric energy or power. Powerplants. Central stations TK1001-1841
spellingShingle	Energy industries. Energy policy. Fuel trade HD9502-9502.5 Production of electric energy or power. Powerplants. Central stations TK1001-1841 Sanjeeb Kumar Mallik Saikat Chakrabarti Sri Niwas Singh Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements
description	Abstract It has been observed by the practicing engineers that the inclusion of measurements from phasor measurement units (PMUs), current measurements in particular, into the conventional state estimators (SEs), may deteriorate the numerical performance of the SEs in terms of convergence and accuracy. This paper analyzes the reason for such possible ill‐conditioning of the hybrid SEs that use both conventional and PMU measurements. It presents simplified analytical approaches to identify what causes such ill‐conditioning when PMU measurements are used. The condition number of SE gain matrix may vary depending on the number of the PMUs and its placement in the network. It has been identified that the large difference in weights that are allocated to the traditional measurements and PMU measurements is the main reason of the ill‐conditioning of the hybrid SEs.
format	article
author	Sanjeeb Kumar Mallik Saikat Chakrabarti Sri Niwas Singh
author_facet	Sanjeeb Kumar Mallik Saikat Chakrabarti Sri Niwas Singh
author_sort	Sanjeeb Kumar Mallik
title	Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements
title_short	Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements
title_full	Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements
title_fullStr	Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements
title_full_unstemmed	Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements
title_sort	analysis of ill‐conditioning of hybrid state estimators in the presence of pmu measurements
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/317292dc94ce41dea5f169e1464493bb
work_keys_str_mv	AT sanjeebkumarmallik analysisofillconditioningofhybridstateestimatorsinthepresenceofpmumeasurements AT saikatchakrabarti analysisofillconditioningofhybridstateestimatorsinthepresenceofpmumeasurements AT sriniwassingh analysisofillconditioningofhybridstateestimatorsinthepresenceofpmumeasurements
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Analysis of Ill‐conditioning of hybrid state estimators in the presence of PMU measurements

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