Wind Turbine Control Impact on Stability of Wind Farms Based on Real-Life Systems Analysis

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Abstract

This paper presents stability analysis of wind farms in frequency domain. The interaction between the wind turbine control system and the wind farm structure in wind farms is deeply investigated. Two wind farms (i.e. Horns Rev II and Karnice) are taken in to consideration in the study. It is shown that wind farm components such as long HVAC cables and park transformers can introduce significant low-frequency series resonances seen form the wind turbine terminals which can affect wind turbine control system operation and overall wind farm stability. The same wind turbine converter control strategy is evaluated in two different wind farms. It is emphasized that the grid-side converter controller should be characterized by sufficient harmonic/noise rejection and adjusted depending on wind farms to which it is connected. Various stability indices such as gain margin, vector gain margin, and phase margin are used in order to emphasize differences between the two wind farms.
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This paper presents stability analysis of wind farms in frequency domain. The interaction between the wind turbine control system and the wind farm structure in wind farms is deeply investigated. Two wind farms (i.e. Horns Rev II and Karnice) are taken in to consideration in the study. It is shown that wind farm components such as long HVAC cables and park transformers can introduce significant low-frequency series resonances seen form the wind turbine terminals which can affect wind turbine control system operation and overall wind farm stability. The same wind turbine converter control strategy is evaluated in two different wind farms. It is emphasized that the grid-side converter controller should be characterized by sufficient harmonic/noise rejection and adjusted depending on wind farms to which it is connected. Various stability indices such as gain margin, vector gain margin, and phase margin are used in order to emphasize differences between the two wind farms.
Original languageEnglish
Title of host publicationProceedings of the EWEA 2012 - Europe's Primier Wind Energy Event
Number of pages8
Publication date2012
StatePublished - 2012
Publication categoryResearch
Peer-reviewedYes
EventEWEA 2012: Europe's Primier Wind Energy Event - Bella Center, Copenhagen, Denmark, Copenhagen, Denmark
Duration: 16 Apr 201219 Apr 2012

Conference

ConferenceEWEA 2012
LocationBella Center, Copenhagen, Denmark
LandDenmark
ByCopenhagen
Periode16/04/201219/04/2012

    Research areas

  • Offshore wind farms, Stability analysis, Stability margins, Wind farm aggregation, Wind turbine control

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