Methods

Some various methods used in LinDistFlow.jl:

CommonOPF.j_to_k — Function

function j_to_k(j::AbstractString, p::Inputs)

find all busses downstream of bus j

CommonOPF.i_to_j — Function

function i_to_j(j::AbstractString, p::Inputs)

find all busses upstream of bus j

Note

In a radial network this function should return an Array with length of 1.

CommonOPF.singlephase38linesInputs — Function

singlephase38linesInputs(;
    Pload=Dict{String, AbstractArray{Real, 1}}(), 
    Qload=Dict{String, AbstractArray{Real, 1}}(), 
    T=24,
    loadnodes = ["3", "5", "36", "9", "10", "11", "12", "13", "15", "17", "18", "19", "22", "25", 
                "27", "28", "30", "31", "32", "33", "34", "35"],
    Sbase = 1e6,
    Vbase = 12.5e3,
    v0=1.0,
    v_uplim = 1.05,
    v_lolim = 0.95,
)

Convenience function for creating a single phase network with 38 lines and nodes. Taken from: Andrianesis et al. 2019 "Locational Marginal Value of Distributed Energy Resources as Non-Wires Alternatives"

NOTE that Inputs is a mutable struct (s.t. loads can be added later).

LinDistFlow.constrain_line_amps — Function

constrain_line_amps(m::JuMP.AbstractModel, p::Inputs{MultiPhase})

Constrain the estimated line amps using the p.Isquared_up_bounds in both the postive and negative directions.

See define_line_amps_pu for more.

source

LinDistFlow.define_line_amps_pu — Function

define_line_amps_pu(m::JuMP.AbstractModel, p::Inputs{MultiPhase})

Estimating the line amps as $|(V_i - V_j) / Z|$ where we use the approximation:

$|V_i - V_j| \approx r_{ij} P_{ij} + x_{ij} Q_{ij}$

The expressions are stored in the model.obj_dict with key :amps_pu.

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