Power Model

type GenericPowerModel{T<:AbstractPowerFormulation}
    model::JuMP.Model
    data::Dict{String,<:Any}
    setting::Dict{String,<:Any}
    solution::Dict{String,<:Any}
    ref::Dict{Symbol,<:Any} # reference data
    var::Dict{Symbol,<:Any} # JuMP variables
    con::Dict{Symbol,<:Any} # JuMP constraint references
    cnw::Int              # current network index value
    ccnd::Int             # current conductor index value
    ext::Dict{Symbol,<:Any} # user extentions
end

where

• data is the original data, usually from reading in a .json or .m (patpower) file,
• setting usually looks something like Dict("output" => Dict("branch_flows" => true)), and
• ref is a place to store commonly used pre-computed data from of the data dictionary, primarily for converting data-types, filtering out deactivated components, and storing system-wide values that need to be computed globally. See build_ref(data) for further details.

Methods on GenericPowerModel for defining variables and adding constraints should

• work with the ref dict, rather than the original data dict,
• add them to model::JuMP.Model, and
• follow the conventions for variable and constraint names.

used for building ref without the need to build a GenericPowerModel