Analysis of Fixed-Speed Wind Farm Low-Frequency Power Pulsations using a Wavelet-Prony Method

D. McSwiggan, Timothy Littler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The increasing penetration of wind generation on the Island of Ireland has been accompanied by close investigation of low-frequency periodic pulsations contained within the active power flow from different wind farms. A primary concern is excitation of existing low-frequency oscillation modes already present on the system, particularly the 0.75 Hz mode as a consequence of the interconnected Northern and Southern power system networks. Recently grid code requirements on the Northern Ireland power system have been updated stipulating that wind farms connected after 2005 must be able to control the magnitude of oscillations in the range of 0.25 - 1.75 Hz to within 1% of the wind farm's registered output. In order to determine whether wind farm low-frequency oscillations have a negative effect (excite other modes) or possibly a positive impact (damping of existing modes) on the power system, the oscillations at the point of connection must be measured and characterised. Using time - frequency methods, research presented in this paper has been conducted to extract signal features from measured low-frequency active power pulsations produced by wind farms to determine the effective composition of possible oscillatory modes which may have a detrimental effect on system dynamic stability. The paper proposes a combined wavelet-Prony method to extract modal components and determine damping factors. The method is exemplified using real data obtained from wind farm measurements.
Original languageEnglish
Title of host publicationProceedings of the IEEE Power & Energy Society Meeting 2010
Number of pages7
ISBN (Electronic)978-1-4244-8357-0
Publication statusPublished - Jul 2010
EventIEEE Power Engineering Society General Meeting, 2010 (PES '10) - Minneapolis, MN, United States
Duration: 01 Jul 201001 Jul 2010


ConferenceIEEE Power Engineering Society General Meeting, 2010 (PES '10)
Country/TerritoryUnited States
CityMinneapolis, MN

Bibliographical note

ISSN: 1944-9925


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