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Optimization Under Uncertainty for Wake Steering Strategies

Conference ·
 [1];  [1];  [1];  [1];  [1];  [2]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. Brigham Young University
+ Show Author Affiliations
Offsetting turbines' yaw orientations from incoming wind is a powerful tool that may be leveraged to reduce undesirable wake effects on downstream turbines. First, we examine a simple two-turbine case to gain intuition as to how inflow direction uncertainty affects the optimal solution. The turbines are modeled with unidirectional inflow such that one turbine directly wakes the other, using ten rotor diameter spacing. We perform optimization under uncertainty (OUU) via a parameter sweep of the front turbine. The OUU solution generally prefers less steering. We then do this optimization for a 60-turbine wind farm with unidirectional inflow, varying the degree of inflow uncertainty and approaching this OUU problem by nesting a polynomial chaos expansion uncertainty quantification routine within an outer optimization. We examined how different levels of uncertainty in the inflow direction effect the ratio of the expected values of deterministic and OUU solutions for steering strategies in the large wind farm, assuming the directional uncertainty used to reach said OUU solution (this ratio is defined as the value of the stochastic solution or VSS).
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1374526
Report Number(s):
NREL/PR-5000-68865
Country of Publication:
United States
Language:
English

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Cited By (7)

Detection of wakes in the inflow of turbines using nacelle lidars posted_content January 2019
A Study on the Effect of Closed-Loop Wind Farm Control on Power and Tower Load in Derating the TSO Command Condition journal May 2019
Robust active wake control in consideration of wind direction variability and uncertainty journal January 2018
Active Subspaces for Wind Plant Surrogate Modeling conference January 2018
Robust active wake control in consideration of wind direction variability and uncertainty text January 2018
Detection of wakes in the inflow of turbines using nacelle lidars journal January 2019
Dynamic Strategies for Yaw and Induction Control of Wind Farms Based on Large-Eddy Simulation and Optimization journal January 2018

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Related Subjects

17 WIND ENERGY
optimization
optimization under uncertainty
systems engineering
wake steering
wind energy