A PMU-based state estimator considering classic HVDC links under different control modes
2015 (English)In: Sustainable Energy, Grids and Networks, ISSN 2352-4677, Vol. 2, 69-82 p.Article in journal (Refereed) Published
This paper aims to develop a PMU-based state estimation algorithm that considers the presence of classic HVDC links operating under different control modes. Thus, hybrid AC/DC grid state estimation becomes feasible. In this algorithm we assume that DC link measurements can be sampled and reported at the same rate as PMU measurements, so that both AC and DC states can be estimated simultaneously in real-time. The estimation algorithm uses synchrophasors in polar coordinates, which allows angle bias detection and correction. In addition, some practical issues for the proposed state estimator are discussed, including observability and measurement redundancy, measurement noise and weightings, and angle bias correction. Finally, study cases using different power system models are carried out to show the state estimator’s performances during both steady conditions and dynamic changes. Relatively small residuals during steady conditions validate accuracy; results during dynamic changes verify the estimator’s reliability.
Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 2, 69-82 p.
PMU-based state estimation; Classic HVDC link; PMU; Hybrid AC and DC state estimation
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-170838DOI: 10.1016/j.segan.2015.04.004OAI: oai:DiVA.org:kth-170838DiVA: diva2:840501
FunderStandUpEU, FP7, Seventh Framework Programme
QC 201507092015-07-082015-07-082015-07-09Bibliographically approved