Add example of optimizing with disabled turbines.

examples/examples_control_optimization/008_optimize_yaw_with_disabled_turbines.py

@@ -0,0 +1,33 @@
+"""Example: Optimizing yaw angles with disabled turbines
+
+This example demonstrates how to optimize yaw angles in FLORIS, when some turbines are disabled.
+The example optimization is run using both YawOptimizerSR and YawOptimizerGeometric, the two
+yaw optimizers that support disabling turbines.
+"""
+
+import numpy as np
+
+from floris import FlorisModel
+from floris.optimization.yaw_optimization.yaw_optimizer_geometric import YawOptimizationGeometric
+from floris.optimization.yaw_optimization.yaw_optimizer_sr import YawOptimizationSR
+
+# Load a 3-turbine model
+fmodel = FlorisModel("../inputs/gch.yaml")
+
+# Set wind conditions to be the same for two cases
+fmodel.set(wind_directions=[270.]*2, wind_speeds=[8.]*2, turbulence_intensities=[.06]*2)
+
+# Disable turbines (different pattern for each of the two cases)
+# First case: disable the middle turbine
+# Second case: disable the front turbine
+fmodel.set_operation_model('mixed')
+fmodel.set(disable_turbines=np.array([[False, True, False], [True, False, False]]))
+
+# Run optimizations and print results
+yaw_opt = YawOptimizationSR(fmodel)
+df_opt = yaw_opt.optimize()
+print("Serial Refine optimized yaw angles [deg]:\n", df_opt.yaw_angles_opt)
+
+yaw_opt = YawOptimizationGeometric(fmodel)
+df_opt = yaw_opt.optimize()
+print("\nGeometric optimized yaw angles [deg]:\n", df_opt.yaw_angles_opt)