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State estimation of the power system using robust estimator

The presence of gross errors in the process data for the power system state estimation (PSSE) algorithm is very crucial as they may severely degrade its results. The conventionally used state estimator is based on the method of the weighted least squares (WLS) which is not robust against the bad mea...

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Main Authors: Khan, Z., Razali, R.B., Daud, H., Nor, N.M., Firuzabad, M.F.
Format: Conference or Workshop Item
Published: American Institute of Physics Inc. 2016
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005939758&doi=10.1063%2f1.4968167&partnerID=40&md5=37df4eedcaa0cfb1f992633553d89039
http://eprints.utp.edu.my/30681/
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spelling my.utp.eprints.306812022-03-25T07:14:16Z State estimation of the power system using robust estimator Khan, Z. Razali, R.B. Daud, H. Nor, N.M. Firuzabad, M.F. The presence of gross errors in the process data for the power system state estimation (PSSE) algorithm is very crucial as they may severely degrade its results. The conventionally used state estimator is based on the method of the weighted least squares (WLS) which is not robust against the bad measurements that results in larger deviation in output estimates. In this study, a new robust algorithm based on the quasi weighted least squares (QWLS) estimator is presented. The robustness of the QWLS approach is achieved by reducing the impact of bad measurements on the objective function. In the existence of gross errors, the proposed algorithm provides estimates as good as those that are achieved by the conventional method of the WLS when no gross error exists in the process data. The implementation of the proposed algorithm has been illustrated for the case studies on the 6-bus and IEEE 14-bus power networks. The numerical results validate the performance of the proposed estimator in the PSSE algorithm. © 2016 Author(s). American Institute of Physics Inc. 2016 Conference or Workshop Item NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005939758&doi=10.1063%2f1.4968167&partnerID=40&md5=37df4eedcaa0cfb1f992633553d89039 Khan, Z. and Razali, R.B. and Daud, H. and Nor, N.M. and Firuzabad, M.F. (2016) State estimation of the power system using robust estimator. In: UNSPECIFIED. http://eprints.utp.edu.my/30681/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description The presence of gross errors in the process data for the power system state estimation (PSSE) algorithm is very crucial as they may severely degrade its results. The conventionally used state estimator is based on the method of the weighted least squares (WLS) which is not robust against the bad measurements that results in larger deviation in output estimates. In this study, a new robust algorithm based on the quasi weighted least squares (QWLS) estimator is presented. The robustness of the QWLS approach is achieved by reducing the impact of bad measurements on the objective function. In the existence of gross errors, the proposed algorithm provides estimates as good as those that are achieved by the conventional method of the WLS when no gross error exists in the process data. The implementation of the proposed algorithm has been illustrated for the case studies on the 6-bus and IEEE 14-bus power networks. The numerical results validate the performance of the proposed estimator in the PSSE algorithm. © 2016 Author(s).
format Conference or Workshop Item
author Khan, Z.
Razali, R.B.
Daud, H.
Nor, N.M.
Firuzabad, M.F.
spellingShingle Khan, Z.
Razali, R.B.
Daud, H.
Nor, N.M.
Firuzabad, M.F.
State estimation of the power system using robust estimator
author_facet Khan, Z.
Razali, R.B.
Daud, H.
Nor, N.M.
Firuzabad, M.F.
author_sort Khan, Z.
title State estimation of the power system using robust estimator
title_short State estimation of the power system using robust estimator
title_full State estimation of the power system using robust estimator
title_fullStr State estimation of the power system using robust estimator
title_full_unstemmed State estimation of the power system using robust estimator
title_sort state estimation of the power system using robust estimator
publisher American Institute of Physics Inc.
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005939758&doi=10.1063%2f1.4968167&partnerID=40&md5=37df4eedcaa0cfb1f992633553d89039
http://eprints.utp.edu.my/30681/
_version_ 1738657141593473024
score 13.211869

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