ANL-CEEESA/UnitCommitment.jl
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Documented reserve shortfall, soved comments on variables/constraints to structs.jl files, simplified loops, removed extra comments, started replacement of constant-subsitution with @constraint (with option to use fix).

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This commit is contained in:
Aleksandr Kazachkov
2021-07-23 16:30:49 -04:00
parent 0fa6e46928
commit 6096204270
3 changed files with 23 additions and 22 deletions
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37
src/model/formulations/Gar1962/status.jl
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@@ -12,7 +12,6 @@ function _add_status_vars!(
model::JuMP.Model,
g::Unit,
formulation_status_vars::Gar1962.StatusVars,
ALWAYS_CREATE_VARS = false
)::Nothing
is_on = _init(model, :is_on)
switch_on = _init(model, :switch_on)
@@ -65,9 +64,17 @@ function _add_status_vars!(
end
end
if ALWAYS_CREATE_VARS
# If variables are created, use initial conditions to fix some values
if t == 1
# Use initial conditions and whether a unit must run to fix variables
if FIX_VARS
# Fix variables using fix function
if g.must_run[t]
# If the generator _must_ run, then it is obviously on and cannot be switched off
# In the first time period, force unit to switch on if was off before
# Otherwise, unit is on, and will never turn off, so will never need to turn on
fix(is_on[g.name, t], 1.0; force = true)
fix(switch_on[g.name, t], (t == 1 ? 1.0 - _is_initially_on(g) : 0.0); force = true)
fix(switch_off[g.name, t], 0.0; force = true)
elseif t == 1
if _is_initially_on(g)
# Generator was on (for g.initial_status time periods),
# so cannot be more switched on until the period after the first time it can be turned off
@@ -78,30 +85,20 @@ function _add_status_vars!(
fix(switch_off[g.name, 1], 0.0; force = true)
end
end
if g.must_run[t]
# If the generator _must_ run, then it is obviously on and cannot be switched off
# In the first time period, force unit to switch on if was off before
# Otherwise, unit is on, and will never turn off, so will never need to turn on
fix(is_on[g.name, t], 1.0; force = true)
fix(switch_on[g.name, t], (t == 1 ? 1.0 - _is_initially_on(g) : 0.0); force = true)
fix(switch_off[g.name, t], 0.0; force = true)
end
else
# If vars are not created, then replace them by a constant
if t == 1
# Add explicit constraint if !FIX_VARS
if g.must_run[t]
is_on[g.name, t] = 1.0
switch_on[g.name, t] = (t == 1 ? 1.0 - _is_initially_on(g) : 0.0)
switch_off[g.name, t] = 0.0
elseif t == 1
if _is_initially_on(g)
switch_on[g.name, t] = 0.0
else
switch_off[g.name, t] = 0.0
end
end
if g.must_run[t]
is_on[g.name, t] = 1.0
switch_on[g.name, t] = (t == 1 ? 1.0 - _is_initially_on(g) : 0.0)
switch_off[g.name, t] = 0.0
end
end # check if ALWAYS_CREATE_VARS
end
return
end

2
src/model/formulations/base/system.jl
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@@ -70,7 +70,7 @@ function _add_reserve_eqs!(model::JuMP.Model)::Nothing
eq_min_reserve = _init(model, :eq_min_reserve)
instance = model[:instance]
for t in 1:instance.time
# Equation (68) in Kneuven et al. (2020)
# Equation (68) in Knueven et al. (2020)
# As in Morales-España et al. (2013a)
# Akin to the alternative formulation with max_power_avail
# from Carrión and Arroyo (2006) and Ostrowski et al. (2012)

4
src/model/formulations/base/unit.jl
View File

@@ -247,6 +247,10 @@ Variables
* `is_on`
* `switch_off`
* `switch_on`
<<<<<<< HEAD
=======
>>>>>>> c8bf25f (Documented reserve shortfall, soved comments on variables/constraints to structs.jl files, simplified loops, removed extra comments, started replacement of constant-subsitution with @constraint (with option to use fix).)
Constraints
---