Implement randomization method from XavQiuAhm2021

test/transform/randomize/XavQiuAhm2021_test.jl

@@ -0,0 +1,63 @@
+# UnitCommitment.jl: Optimization Package for Security-Constrained Unit Commitment
+# Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+# Released under the modified BSD license. See COPYING.md for more details.
+
+import Random
+import UnitCommitment: XavQiuAhm2021
+
+using Distributions
+using UnitCommitment, Cbc, JuMP
+
+get_instance() = UnitCommitment.read_benchmark("matpower/case118/2017-02-01")
+system_load(instance) = sum(b.load for b in instance.buses)
+test_approx(x, y) = @test isapprox(x, y, atol = 1e-3)
+
+@testset "XavQiuAhm2021" begin
+    @testset "cost and load share" begin
+        instance = get_instance()
+
+        # Check original costs
+        unit = instance.units[10]
+        test_approx(unit.min_power_cost[1], 825.023)
+        test_approx(unit.cost_segments[1].cost[1], 36.659)
+        test_approx(unit.startup_categories[1].cost[1], 7570.42)
+
+        # Check original load share
+        bus = instance.buses[1]
+        prev_system_load = system_load(instance)
+        test_approx(bus.load[1] / prev_system_load[1], 0.012)
+
+        Random.seed!(42)
+        randomize!(
+            instance,
+            XavQiuAhm2021.Randomization(randomize_load_profile = false),
+        )
+
+        # Check randomized costs
+        test_approx(unit.min_power_cost[1], 831.977)
+        test_approx(unit.cost_segments[1].cost[1], 36.968)
+        test_approx(unit.startup_categories[1].cost[1], 7634.226)
+
+        # Check randomized load share
+        curr_system_load = system_load(instance)
+        test_approx(bus.load[1] / curr_system_load[1], 0.013)
+
+        # System load should not change
+        @test prev_system_load ≈ curr_system_load
+    end
+
+    @testset "load profile" begin
+        instance = get_instance()
+
+        # Check original load profile
+        @test round.(system_load(instance), digits = 1)[1:8] ≈
+              [3059.5, 2983.2, 2937.5, 2953.9, 3073.1, 3356.4, 4068.5, 4018.8]
+
+        Random.seed!(42)
+        randomize!(instance, XavQiuAhm2021.Randomization())
+
+        # Check randomized load profile
+        @test round.(system_load(instance), digits = 1)[1:8] ≈
+              [4854.7, 4849.2, 4732.7, 4848.2, 4948.4, 5231.1, 5874.8, 5934.8]
+    end
+end

test/transform/randomize_test.jl

@@ -1,43 +0,0 @@
-# UnitCommitment.jl: Optimization Package for Security-Constrained Unit Commitment
-# Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
-# Released under the modified BSD license. See COPYING.md for more details.
-
-using UnitCommitment, Cbc, JuMP
-
-_get_instance() = UnitCommitment.read_benchmark("matpower/case118/2017-02-01")
-_total_load(instance) = sum(b.load[1] for b in instance.buses)
-
-@testset "randomize_unit_costs!" begin
-    instance = _get_instance()
-    unit = instance.units[10]
-    prev_min_power_cost = unit.min_power_cost
-    prev_prod_cost = unit.cost_segments[1].cost
-    prev_startup_cost = unit.startup_categories[1].cost
-    randomize_unit_costs!(instance)
-    @test prev_min_power_cost != unit.min_power_cost
-    @test prev_prod_cost != unit.cost_segments[1].cost
-    @test prev_startup_cost != unit.startup_categories[1].cost
-end
-
-@testset "randomize_load_distribution!" begin
-    instance = _get_instance()
-    bus = instance.buses[1]
-    prev_load = instance.buses[1].load[1]
-    prev_total_load = _total_load(instance)
-    randomize_load_distribution!(instance)
-    curr_total_load = _total_load(instance)
-    @test prev_load != instance.buses[1].load[1]
-    @test abs(prev_total_load - curr_total_load) < 1e-3
-end
-
-@testset "randomize_peak_load!" begin
-    instance = _get_instance()
-    bus = instance.buses[1]
-    prev_total_load = _total_load(instance)
-    prev_share = bus.load[1] / prev_total_load
-    randomize_peak_load!(instance)
-    curr_total_load = _total_load(instance)
-    curr_share = bus.load[1] / prev_total_load
-    @test curr_total_load != prev_total_load
-    @test abs(curr_share - prev_share) < 1e-3
-end