Bump version to 0.4.2

CHANGELOG.md

@@ -11,6 +11,10 @@ All notable changes to this project will be documented in this file.
 [semver]: https://semver.org/spec/v2.0.0.html
 [pkjjl]: https://pkgdocs.julialang.org/v1/compatibility/#compat-pre-1.0
 
+## [0.4.2] - 2025-11-27
+### Fixed
+- KnuOstWat2018: Fixed a bug in `eq_segprod_limit` constraint (#17)
+
 ## [0.4.0] - 2024-05-21
 ### Added
 - Add support for two-stage stochastic problems

Project.toml

@@ -2,7 +2,7 @@ name = "UnitCommitment"
 uuid = "64606440-39ea-11e9-0f29-3303a1d3d877"
 authors = ["Santos Xavier, Alinson <axavier@anl.gov>"]
 repo = "https://github.com/ANL-CEEESA/UnitCommitment.jl"
-version = "0.4.1"
+version = "0.4.2"
 
 [deps]
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"

src/model/formulations/KnuOstWat2018/pwlcosts.jl

@@ -67,21 +67,19 @@ function _add_production_piecewise_linear_eqs!(
                     (t < T ? Cw * switch_off[gn, t+1] : 0.0)
                 )
             else
-                # Equation (47a)/(48a) in Kneuven et al. (2020)
+                # Equation (47a) in Kneuven et al. (2020)
                 eq_segprod_limit_b[sc.name, gn, t, k] = @constraint(
                     model,
                     segprod[sc.name, gn, t, k] <=
                     g.cost_segments[k].mw[t] * is_on[gn, t] -
-                    Cv * switch_on[gn, t] -
-                    (t < T ? max(0, Cv - Cw) * switch_off[gn, t+1] : 0.0)
+                    Cv * switch_on[gn, t]
                 )
 
-                # Equation (47b)/(48b) in Kneuven et al. (2020)
+                # Equation (47b) in Kneuven et al. (2020)
                 eq_segprod_limit_c[sc.name, gn, t, k] = @constraint(
                     model,
                     segprod[sc.name, gn, t, k] <=
                     g.cost_segments[k].mw[t] * is_on[gn, t] -
-                    max(0, Cw - Cv) * switch_on[gn, t] -
                     (t < T ? Cw * switch_off[gn, t+1] : 0.0)
                 )
             end

test/src/UnitCommitmentT.jl

@@ -23,6 +23,7 @@ include("validation/repair_test.jl")
 include("lmp/conventional_test.jl")
 include("lmp/aelmp_test.jl")
 include("market/market_test.jl")
+include("regression.jl")
 
 basedir = dirname(@__FILE__)
 
@@ -54,6 +55,7 @@ function runtests()
         lmp_aelmp_test()
         simple_market_test()
         stochastic_market_test()
+        regression_test()
     end
     return
 end

test/src/regression.jl

@@ -0,0 +1,19 @@
+# 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, HiGHS, JuMP
+
+function regression_test()
+    @testset "GitHub Issue #57" begin
+        instance = UnitCommitment.read(fixture("issue-0057.json.gz"))
+        model = UnitCommitment.build_model(
+            instance = instance,
+            optimizer = HiGHS.Optimizer,
+        )
+        JuMP.set_silent(model)
+        UnitCommitment.optimize!(model)
+        solution = UnitCommitment.solution(model)
+        @test solution["Thermal production (MW)"]["gen_524d4c85"][1] == 90.0
+    end
+end