www.ecn.nl

Towards new industrial software for advanced wind turbine control

EWEC 2011, Brussels, March 2011Stoyan Kanev

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Background

• Advanced wind turbine control can achieve further reduction of the cost of wind energy by:‑ Maximizing power production‑ Minimizing ultimate and fatigue loads (blades,

drivetrain, nacelle, tower)Weight reductionUpscalingDecreased maintenance costs (higher

availability)

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Background

• Present commercial controller ECN-CDT is designed to minimize blade pitch excursions, featuring:+Reduced pitch actuator loading,‑ Power losses (can be rather large!)‑ No fatigue load reduction on blades/tower

• Project goal: by allowing more actuator activity, achieve increased power production and reduced loads using advanced control

• Partners: DotX, ECN, XEMC-Darwind, MPS

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Overview of NCM tool

• NCM wind turbine model for control purposes

• Turbine state and wind estimator

• NCM controller

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NCM turbine model

• Structural dynamics: first modes of the drive-train and the tower dynamics in fore-aft and sideward direction

• Aerodynamics: ‑ thrust and torque coefficients defined per blade‑ blade effective forces and torques‑ dynamic inflow effects by lead-lag filtering of

pitch angle before entering CQ and CT

•Wind modelling: ‑ blade-effective winds (turbulence/rot. sampling)‑ deterministic wind effects

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Results: NCM model vs. Phatas (XV90)

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NCM observer

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Results: NCM observer

• Data from Phatas XV90 simulation with ECN-CDT

• Simulated load cases

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Results: NCM observer

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Results: NCM baseline vs. CDT controller

Preliminary results with

• Simulations in NCM environment

• XV90 model

• DLC 1.2 (NTM, wind speeds 9, 12, 15, 20 m/s)

• Comparison b/n ‑ ECN-CDT, and‑ NCM baseline controller

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Results: NCM baseline vs. CDT controller

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Results: NCM baseline vs. CDT controller

-6,5%

-19%

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Conclusions

• Starting point in NCM controller development is power production quality and loads reduction

• Status NCM baseline controller: 90% ready; drivetrain damping, IPC, and actuator constraints handling yet to be implemented [02/2010]

• Next: ‑ C-code, coupling to aeroelastic tools via DLLs‑ Loadset computations with Phatas and Bladed‑ Prototype implementation