Field Testing of Linear Individual Pitch Control on the Two-Bladed Controls Advanced Research Turbine

Paul Fleming, Edwin Solingen, Jan-Willem Wingerden, Andrew Scholbrock

Research output: Contribution to journalArticlepeer-review

16 Scopus Citations


This paper presents the results of field tests using linear individual pitch control (LIPC) on the two-bladed Controls Advanced Research Turbine 2 (CART2) at the National Renewable Energy Laboratory (NREL). LIPC has recently been introduced as an alternative to the conventional individual pitch control (IPC) strategy for two-bladed wind turbines. The main advantage of LIPC over conventional IPC is that it requires, at most, only two feedback loops to potentially reduce the periodic blade loads. In previous work, LIPC was designed to implement blade pitch angles at a fixed frequency [e.g., the once-per-revolution (1P) frequency], which made it only applicable in above-rated wind turbine operating conditions. In this study, LIPC is extended to below-rated operating conditions by gain scheduling the controller on the rotor speed. With this extension, LIPC and conventional IPC are successfully applied to the NREL CART2 wind turbine. The field-test results obtained during the measurement campaign indicate that LIPC significantly reduces the wind turbine loads for both below-rated and above-rated operation.

Original languageAmerican English
Pages (from-to)421-436
Number of pages16
JournalWind Energy
Issue number3
StatePublished - 2016

Bibliographical note

Publisher Copyright:
© 2015 John Wiley & Sons, Ltd.

NREL Publication Number

  • NREL/JA-5000-63224


  • (linear) individual pitch control
  • experimental validation
  • field testing
  • load reduction
  • two-bladed wind turbines


Dive into the research topics of 'Field Testing of Linear Individual Pitch Control on the Two-Bladed Controls Advanced Research Turbine'. Together they form a unique fingerprint.

Cite this