Profiled units: minor changes

docs/src/format.md

@@ -70,7 +70,10 @@ This section describes the characteristics of each bus in the system.
 
 ### Generators
 
-This section describes all generators in the system, including thermal units, renewable units and virtual units. Two types of generators can be specified - thermal units and profiled units. A thermal unit consists of different fields, while a profiled unit is a simple generator with only a production capacity and a per-unit cost. 
+This section describes all generators in the system. Two types of units can be specified:
+
+- **Thermal units:** Units that produce power by converting heat into electrical energy, such as coal and oil power plants. These units use a more complex model, with binary decision variables, and various constraints to enforce ramp rates and minimum up/down time.
+- **Profiled units:** Simplified model for units that do not require the constraints mentioned above, only a maximum and minimum power output for each time period. Typically used for renewables and hydro.
 
 #### Thermal Units
 
@@ -90,7 +93,7 @@ This section describes all generators in the system, including thermal units, re
 | `Initial power (MW)`  | Amount of power the generator at time step `-1`, immediately before the planning horizon starts. | Required | N
 | `Must run?`               | If `true`, the generator should be committed, even if that is not economical (Boolean). | `false` | Y
 | `Reserve eligibility` | List of reserve products this generator is eligibe to provide. By default, the generator is not eligible to provide any reserves. | `[]` | N
-| `Commitment status` | List of commitment status over the time horizon. At time `t`, if `true`, the generator must be commited at that time period; if `false`, the generator must not be commited at that time period. If `null` at time `t`, the generator's commitment status is then decided by the model. By default, the status is a list of `null` values. | `[null]` | Y
+| `Commitment status` | List of commitment status over the time horizon. At time `t`, if `true`, the generator must be commited at that time period; if `false`, the generator must not be commited at that time period. If `null` at time `t`, the generator's commitment status is then decided by the model. By default, the status is a list of `null` values. | `null` | Y
 
 #### Profiled Units
 
@@ -99,8 +102,8 @@ This section describes all generators in the system, including thermal units, re
 | `Bus`             | Identifier of the bus where this generator is located (string). | Required | N
 | `Type`            | Type of the generator (string). For profiled generators, this must be `Profiled`.  | Required | N
 | `Cost ($/MW)`     | Cost incurred for serving each MW of power by this generator. | Required | Y
-| `Minimum power (MW)` | Minimum amount of power to be supplied by this generator. Any amount greater than this may be supplied. | `0.0` | Y
-| `Maximum power (MW)` | Maximum amount of power to be supplied by this generator. Any amount lower than this may be supplied. | Required | Y
+| `Minimum power (MW)` | Minimum amount of power this generator may supply. | `0.0` | Y
+| `Maximum power (MW)` | Maximum amount of power this generator may supply. | Required | Y
 
 #### Production costs and limits
 

src/model/formulations/base/unit.jl

@@ -24,6 +24,7 @@ function _add_unit_commitment!(
     _add_min_uptime_downtime_eqs!(model, g)
     _add_startup_cost_eqs!(model, g, formulation.startup_costs)
     _add_status_eqs!(model, g, formulation.status_vars)
+    _add_commitment_status_eqs!(model, g)
     return
 end
 
@@ -61,7 +62,6 @@ function _add_unit_dispatch!(
         sc,
     )
     _add_startup_shutdown_limit_eqs!(model, g, sc)
-    _add_commitment_status_eqs!(model, g, sc)
     return
 end
 
@@ -274,15 +274,13 @@ end
 function _add_commitment_status_eqs!(
     model::JuMP.Model,
     g::ThermalUnit,
-    sc::UnitCommitmentScenario,
 )::Nothing
     is_on = model[:is_on]
     T = model[:instance].time
     eq_commitment_status = _init(model, :eq_commitment_status)
     for t in 1:T
-        # Fix commitment status
         if g.commitment_status[t] !== nothing
-            eq_commitment_status[sc.name, g.name, t] = @constraint(
+            eq_commitment_status[g.name, t] = @constraint(
                 model,
                 is_on[g.name, t] == (g.commitment_status[t] ? 1.0 : 0.0)
             )