Adding additional fields

All components currently implemented in PowerSystems.jl have an ext field that contains an empty Dictionary. This empty dictionary can be accessed with the method get_ext. shows an example of adding additional data to the ThermalStandard structs for other modeling requirements.

This method is useful if there is no requirement to create new behaviours for components of a particular type but additional fields are required. A simple example is the addition of geographic information if needed.

using PowerSystems
const PSY = PowerSystems

system = System(joinpath(DATA_DIR, "matpower/case5_re.m"))

for g in get_components(ThermalStandard, system)
    external_field = get_ext(g)
    external_field["my_data"] = 1.0
end

gen_alta = get_component(ThermalStandard, system, "Alta")

my_data = get_ext(gen_alta)["my_data"]

1.0