Posters
Come meet the poster presenters to ask them questions and discuss their work
We would like to invite you to come and see the posters at our upcoming conference. The posters will showcase a diverse range of research topics, and will give delegates an opportunity to engage with the authors and learn more about their work. Whether you are a seasoned researcher or simply curious about the latest developments in your field, we believe that the posters will offer something of interest to everyone. So please join us at the conference and take advantage of this opportunity to learn and engage with your peers in the academic community. We look forward to seeing you there!
PO247: Wind turbine control interaction with pitch system faults
Aron Pujana-Arrese, Head of Control and Monitoring, Ikerlan
Abstract
Practical turbine fault analysis focuses heavily on ensuring that no foreseeable set of circumstances can lead to a pitch system deviating signi cantly from its nominal behaviour for more than a few seconds, or being unable to pitch at least two blades to feather, via prompt detection of said circumstances and subsequent corrective or preemptive action. We know, however, of no eff orts to analyse pitch system faults which do not trigger said actions most of the time, but they do occasionally and, seemingly, at random. We present such an eff ort on the basis of the DTU 10 MW reference model and a purpose-made hydraulic pitch system model, which we modifi ed to simulate di fferent faults. Via a simulation campaign, we analyse what faults may, while mostly allowing normal turbine operation, result in excessively frequent triggering of safety events. This interests us as guidance for the use of internal pitch system diagnosis method outputs. The results suggest that relatively severe pitch system faults can be tolerable, and that said fault tolerance may be modified by changing the turbine control algorithms. We have proposed, as an illustrative example, one simple such change by which to save oil during situations that normally require fast reduction of the pitch angle, with the result that low pressure alarms and the subsequent shutdowns become rarer. We conclude from this that it may be worthwhile to pursue a line of research on turbine control algorithms which take the pitch system internals into account to improve the turbine's tolerance of pitch system faults. A framework for a rigorous analysis of said improvements is our near-term research objective.
