MPC Inputs

The input structure for MPC models is very similar to the structure for REopt Inputs. The primary differences are

The MPCElectricTariff requires specifying individual rate components (and does not parse URDB rates like ElectricTariff).
The capacities of any provided DER must be provided
The load profile for each time step must be provided

Just like REopt Inputs, inputs to run_mpc can be provided in one of three formats:

a file path (string) to a JSON file,
a Dict, or
using the MPCInputs struct

The accepted keys for the JSON file or Dict are:

ElectricLoad
ElectricTariff
PV
ElectricStorage
Financial
Generator
ElectricUtility
Settings

The simplest scenario does not have any dispatch optimization and is essentially a cost "calculator":

{
    "ElectricLoad": {
        "loads_kw": [10.0, 11.0, 12.0]
    },
    "ElectricTariff": {
        "energy_rates": [0.1, 0.2, 0.3]
    }
}

Note

The ElectricLoad.loads_kw can have an arbitrary length, but its length must be the same lengths as many other inputs such as the MPCElectricTariff.energy_rates and the PV.production_factor_series.

Here is a more complex MPCScenario, which is used in MPC Examples:

{
    "PV": {
        "size_kw": 150,
        "production_factor_series": [
            0.0,
            0.0,
            0.0,
            0.0,
            0.0,
            0.0,
            0.0,
            0.05,
            0.10,
            0.15,
            0.30,
            0.6,
            0.5,
            0.3,
            0.02,
            0.01,
            0.005,
            0.0,
            0.0,
            0.0,
            0.0,
            0.0,
            0.0,
            0.0
        ]
    },
    "ElectricStorage": {
        "size_kw": 30.0,
        "size_kwh": 60.0,
        "can_grid_charge": true
    },
    "ElectricLoad": {
        "loads_kw": [
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100,
            100
        ]
    },
    "ElectricTariff": {
        "energy_rates": [
            0.1,
            0.1,
            0.1,
            0.1,
            0.1,
            0.1,
            0.15,
            0.15,
            0.15,
            0.15,
            0.15,
            0.15,
            0.15,
            0.2,
            0.2,
            0.2,
            0.3,
            0.2,
            0.2,
            0.2,
            0.1,
            0.1,
            0.1,
            0.1
        ],
        "monthly_demand_rates": [10.0],
        "monthly_previous_peak_demands": [98.0],
        "tou_demand_rates": [0.0, 15.0],
        "tou_demand_time_steps": [
            [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], 
            [16, 17, 18, 19, 20, 21, 22, 23, 24]
        ],
        "tou_previous_peak_demands": [98.0, 97.0],
        "net_metering": false,
        "export_rates": [0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 
            0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05]
    }
}

MPC Input Structures

Note that the keys of the input Dict or JSON file do not need the MPC prefix.

MPCElectricTariff

REopt.MPCElectricTariff — Method

MPCElectricTariff(d::Dict)

function for parsing user inputs into

    struct MPCElectricTariff
        monthly_previous_peak_demands::Array{Float64,1}
        energy_rates::Array{Float64,1} 

        monthly_demand_rates::Array{Float64,1}
        time_steps_monthly::Array{Array{Int64,1},1}  # length = 0 or 12

        tou_demand_rates::Array{Float64,1}
        tou_demand_ratchet_time_steps::Array{Array{Int64,1},1}  # length = n_tou_demand_ratchets
        tou_previous_peak_demands::Array{Float64,1}

        fixed_monthly_charge::Float64
        annual_min_charge::Float64
        min_monthly_charge::Float64

        export_rates::DenseAxisArray{Array{Float64,1}}
        export_bins::Array{Symbol,1}
    end

Keys for d include:

energy_rates
- REQUIRED
- must have length equal to ElectricLoad.loads_kw
monthly_demand_rates
- default = [0]
time_steps_monthly
- array of arrays for integer time steps that the monthly_demand_rates apply to
- default = [collect(1:length(energy_rates))]
monthly_previous_peak_demands
- default = [0]
tou_demand_rates
- an array of time-of-use demand rates
- must have length equal to tou_demand_time_steps
- default = []
tou_demand_time_steps
- an array of arrays for the integer time steps that apply to the tou_demand_rates
- default = []
tou_previous_peak_demands
- an array of the previous peak demands set in each time-of-use demand period
- must have length equal to tou_demand_time_steps
- default = []
net_metering
- boolean, if true then customer DER export is compensated at the energy_rates
export_rates
- can be a <:Real or Array{<:Real, 1}, or not provided
- if provided, customer DER export is compensated at the export_rates

NOTE: if both net_metering=true and export_rates are provided then the model can choose from either option.

source

MPCElectricLoad

REopt.MPCElectricLoad — Type

MPCElectricLoad

Base.@kwdef struct MPCElectricLoad
    loads_kw::Array{Real,1}
    critical_loads_kw::Union{Nothing, Array{Real,1}} = nothing
end

source

MPCElectricStorage

REopt.MPCElectricStorage — Type

MPCElectricStorage

Base.@kwdef struct MPCElectricStorage < AbstractElectricStorage
    size_kw::Float64
    size_kwh::Float64
    charge_efficiency::Float64 =  0.96 * 0.975^2
    discharge_efficiency::Float64 =  0.96 * 0.975^2
    soc_min_fraction::Float64 = 0.2
    soc_init_fraction::Float64 = 0.5
    can_grid_charge::Bool = true
    grid_charge_efficiency::Float64 = 0.96 * 0.975^2
end

source

MPCFinancial

REopt.MPCFinancial — Type

MPCFinancial

Base.@kwdef struct MPCFinancial
    value_of_lost_load_per_kwh::Union{Array{R,1}, R} where R<:Real = 1.00
end

source

MPCPV

REopt.MPCPV — Type

MPCPV

Base.@kwdef struct MPCPV
    name::String="PV"
    size_kw::Real = 0
    production_factor_series::Union{Nothing, Array{Real,1}} = nothing
end

source

MPCGenerator

REopt.MPCGenerator — Type

MPCGenerator

struct with inner constructor:

function MPCGenerator(;
    size_kw::Real,
    fuel_cost_per_gallon::Real = 3.0,
    electric_efficiency_full_load::Real = 0.3233,
    electric_efficiency_half_load::Real = electric_efficiency_full_load,
    fuel_avail_gal::Real = 1.0e9,
    fuel_higher_heating_value_kwh_per_gal::Real = KWH_PER_GAL_DIESEL,
    min_turn_down_fraction::Real = 0.0,  # TODO change this to non-zero value
    only_runs_during_grid_outage::Bool = true,
    sells_energy_back_to_grid::Bool = false,
    om_cost_per_kwh::Real=0.0,
    )

source

MPCSettings

The MPCSettings is the same as the Settings.

MPCLimits

REopt.MPCLimits — Type

MPCLimits

struct for MPC specific input parameters:

grid_draw_limit_kw_by_time_step::Vector{<:Real} limits for grid power consumption in each time step; length must be same as length(loads_kw).
export_limit_kw_by_time_step::Vector{<:Real} limits for grid power export in each time step; length must be same as length(loads_kw).

Warn

grid_draw_limit_kw_by_time_step and export_limit_kw_by_time_step values can lead to infeasible problems. For example, there is a constraint that the electric load must be met in each time step and by limiting the amount of power from the grid the load balance constraint could be infeasible.

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