Online estimation of subsynchronous voltage components in power systems
2008 (English)In: IEEE Transactions on Power Delivery, ISSN 0885-8977, E-ISSN 0885-8877, Vol. 23, no 1, 410-418 p.Article in journal (Refereed) Published
In this paper, the problem of online estimation of subsynchronous frequency components in the measured grid voltage is treated. Two estimation methods, one based on the use of lowpass filters and a recursive least square algorithm, are investigated and compared. In particular, due to its higher degree of freedom in the design, the lowpass filters-based estimation method is found to be the most appropriate and accordingly further analyzed. The method is improved to cope with inaccurate knowledge of the subsynchronous frequency. The simulation results prove the effectiveness of the investigated method both for the ideal and the disturbed case.
Place, publisher, year, edition, pages
2008. Vol. 23, no 1, 410-418 p.
filters, frequency-component estimation, recursive least square (RLS), subsynchronous resonance (SSR), torsional oscillations
IdentifiersURN: urn:nbn:se:kth:diva-17263DOI: 10.1109/tpwrd.2007.905557ISI: 000252059100050OAI: oai:DiVA.org:kth-17263DiVA: diva2:335306
QC 201005252010-08-052010-08-05Bibliographically approved