Add RT, XT, ZR, ZX parameters to ext dict for generator.

src/PowerSystems.jl

@@ -39,6 +39,7 @@ export TModelHVDCLine
 export Transformer2W
 export TapTransformer
 export PhaseShiftingTransformer
+export Transformer3W
 
 # from IS function_data.jl
 export FunctionData
@@ -636,6 +637,7 @@ import InfrastructureSystems:
     COMPONENT_NAME_DELIMITER,
     make_selector,
     rebuild_selector
+
 import InfrastructureSystems:
     ValueCurve,
     InputOutputCurve,

src/base.jl

@@ -2175,6 +2175,20 @@ function check_attached_buses(sys::System, component::Branch)
     return
 end
 
+function check_attached_buses(sys::System, component::Transformer3W)
+    arc_ps = get_primary_secondary_arc(component)
+    arc_pt = get_primary_tertiary_arc(component)
+    bus_primary = get_from(arc_ps)
+    bus_secondary = get_to(arc_ps)
+    bus_tertiary = get_to(arc_pt)
+    star_bus = get_star_bus(component)
+    throw_if_not_attached(bus_primary, sys)
+    throw_if_not_attached(bus_secondary, sys)
+    throw_if_not_attached(bus_tertiary, sys)
+    throw_if_not_attached(star_bus, sys)
+    return
+end
+
 function check_attached_buses(sys::System, component::DynamicBranch)
     check_attached_buses(sys, get_branch(component))
     return
@@ -2226,6 +2240,20 @@ function check_component_addition(sys::System, branch::Branch; kwargs...)
     return
 end
 
+function check_component_addition(sys::System, component::Transformer3W; kwargs...)
+    arc_ps = get_primary_secondary_arc(component)
+    arc_pt = get_primary_tertiary_arc(component)
+    bus_primary = get_from(arc_ps)
+    bus_secondary = get_to(arc_ps)
+    bus_tertiary = get_to(arc_pt)
+    star_bus = get_star_bus(component)
+    throw_if_not_attached(bus_primary, sys)
+    throw_if_not_attached(bus_secondary, sys)
+    throw_if_not_attached(bus_tertiary, sys)
+    throw_if_not_attached(star_bus, sys)
+    return
+end
+
 function check_component_addition(sys::System, dyn_branch::DynamicBranch; kwargs...)
     if !_is_deserialization_in_progress(sys)
         throw_if_not_attached(dyn_branch.branch, sys)
@@ -2332,6 +2360,30 @@ function _handle_branch_addition_common!(sys::System, component::Branch)
     return
 end
 
+function _handle_branch_addition_common!(sys::System, component::Transformer3W)
+    # If this arc is already attached to the system, assign it to the 3W XFRM.
+    # Else, add it to the system.
+    arcs = [
+        get_primary_secondary_arc(component),
+        get_secondary_tertiary_arc(component),
+        get_primary_tertiary_arc(component),
+    ]
+    set_arc_methods = [
+        set_primary_secondary_arc!,
+        set_secondary_tertiary_arc!,
+        set_primary_tertiary_arc!,
+    ]
+    for (ix, arc) in enumerate(arcs)
+        _arc = get_component(Arc, sys, get_name(arc))
+        if isnothing(_arc)
+            add_component!(sys, arc)
+        else
+            set_arc_methods[ix](component, _arc)
+        end
+    end
+    return
+end
+
 _handle_branch_addition_common!(sys::System, component::AreaInterchange) = nothing
 
 """