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UnitCommitment.jl/src/solution/fix.jl

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# 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.
"""
fix!(model::JuMP.Model, solution::AbstractDict)::Nothing
Fix the value of all binary variables to the ones specified by the given
solution. Useful for computing LMPs.
"""
function fix!(model::JuMP.Model, solution::AbstractDict)::Nothing
instance, T = model[:instance], model[:instance].time
"Thermal production (MW)" keys(solution) ?
solution = Dict("s1" => solution) : nothing
is_on = model[:is_on]
prod_above = model[:prod_above]
reserve = model[:reserve]
for sc in instance.scenarios
for g in sc.thermal_units
for t in 1:T
is_on_value = round(solution[sc.name]["Is on"][g.name][t])
prod_value = round(
solution[sc.name]["Thermal production (MW)"][g.name][t],
digits = 5,
)
JuMP.fix(is_on[g.name, t], is_on_value, force = true)
JuMP.fix(
prod_above[sc.name, g.name, t],
prod_value - is_on_value * g.min_power[t],
force = true,
)
end
end
for r in sc.reserves
r.type == "spinning" || continue
for g in r.thermal_units
for t in 1:T
reserve_value = round(
solution[sc.name]["Spinning reserve (MW)"][r.name][g.name][t],
digits = 5,
)
JuMP.fix(
reserve[sc.name, r.name, g.name, t],
reserve_value,
force = true,
)
end
end
end
end
return
end