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Charge and discharge of the supercapacitor

In this example, a supercapacitor is modeled, from which voltage readings are taken during its charging and subsequent discharge. To charge the supercapacitor for 100 seconds, a current of 100 mA is supplied to it from the mains. Then the supercapacitor is not used for one minute. During the next hour, a 50 mA load is connected for one second every 50 seconds to discharge the supercapacitor.

Model diagram:

supercapacitor_charging_and_discharging_behavior--1743426433042.png

Defining the function to load and run the model:

In [ ]: 
function start_model_engee()
    try
        engee.close("supercapacitor_charging_and_discharging_behavior", force=true) # closing the model
        catch err # if there is no model to close and engee.close() is not executed, it will be loaded after catch.
            m = engee.load("$(@__DIR__)/supercapacitor_charging_and_discharging_behavior.engee") # loading the model
        end;

    try
        engee.run(m, verbose=true) # launching the model
        catch err # if the model is not loaded and engee.run() is not executed, the bottom two lines after catch will be executed.
            m = engee.load("$(@__DIR__)/supercapacitor_charging_and_discharging_behavior.engee") # loading the model
            engee.run(m, verbose=true) # launching the model
        end
end
Out[0]:
start_model_engee (generic function with 1 method)

Running the simulation

In [ ]: 
start_model_engee();

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Writing simulation data to variables:

In [ ]: 
t = simout["supercapacitor_charging_and_discharging_behavior/SysOutput_1"].time[:]
load_current = simout["supercapacitor_charging_and_discharging_behavior/SysOutput_1"].value[:]
supercapacitor_voltage = simout["supercapacitor_charging_and_discharging_behavior/SysOutput_2"].value[:]
Out[0]:
WorkspaceArray{Float64}("supercapacitor_charging_and_discharging_behavior/SysOutput_2").value

Data visualization

In [ ]: 
using Plots
In [ ]: 
p1 = plot(t, load_current, linewidth=2, label="Load, mA", ylabel="Current, mA", lc=2)
p2 = plot(t, supercapacitor_voltage, linewidth=2, label="Supercapacitor voltage", xlabel="Time, from", ylabel="For example, In")
plot(p1, p2, layout=(2,1))
Out[0]:

Blocks used in example