Use 4-digit years

src/solution/methods/XavQiuWanThi2019/optimize.jl

@@ -0,0 +1,56 @@
+# 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.
+
+function optimize!(model::JuMP.Model, method::XavQiuWanThi2019)::Nothing
+    function set_gap(gap)
+        try
+            JuMP.set_optimizer_attribute(model, "MIPGap", gap)
+            @info @sprintf("MIP gap tolerance set to %f", gap)
+        catch
+            @warn "Could not change MIP gap tolerance"
+        end
+    end
+    initial_time = time()
+    large_gap = false
+    has_transmission = (length(model[:isf]) > 0)
+    if has_transmission && method.two_phase_gap
+        set_gap(1e-2)
+        large_gap = true
+    else
+        set_gap(method.gap_limit)
+    end
+    while true
+        time_elapsed = time() - initial_time
+        time_remaining = method.time_limit - time_elapsed
+        if time_remaining < 0
+            @info "Time limit exceeded"
+            break
+        end
+        @info @sprintf(
+            "Setting MILP time limit to %.2f seconds",
+            time_remaining
+        )
+        JuMP.set_time_limit_sec(model, time_remaining)
+        @info "Solving MILP..."
+        JuMP.optimize!(model)
+        has_transmission || break
+        violations = _find_violations(
+            model,
+            max_per_line = method.max_violations_per_line,
+            max_per_period = method.max_violations_per_period,
+        )
+        if isempty(violations)
+            @info "No violations found"
+            if large_gap
+                large_gap = false
+                set_gap(method.gap_limit)
+            else
+                break
+            end
+        else
+            _enforce_transmission(model, violations)
+        end
+    end
+    return
+end