Jaromił Najman

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3. Using a for loop for a single or specific value in variable list in constraint formulation

You have to set the variable's vtype to be integer, see the documentation of addVars. BatteryPower = steel.addVars(time1, lb= -3, ub = 3, vtype=gp.GRB.INTEGER, name="BatteryPower")

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• Jaromił Najman
• 2024年09月06日 18:28
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1. コミュニティ
2. Programming
3. Using a for loop for a single or specific value in variable list in constraint formulation

How do I write it as variable? You already added it as a tupledict of variables by the code BatteryPower = steel.addVars(time1, lb= -3, ub = 3, name="BatteryPower") You now just have to access it...

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• Jaromił Najman
• 2024年09月06日 10:14
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1. コミュニティ
2. Programming
3. Using a for loop for a single or specific value in variable list in constraint formulation

You define BatterPower via the addVars method. This means that the object BatterPower does not hold a single variable, but a tupledict of variables. Did you mean to access \(\texttt{BatteryPower[t]...

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• Jaromił Najman
• 2024年09月06日 10:08
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1. コミュニティ
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3. Using a for loop for a single or specific value in variable list in constraint formulation

How do you define the optimization variable BatteryPower? Is it only one variable?

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• Jaromił Najman
• 2024年09月06日 09:59
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1. コミュニティ
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3. Using a for loop for a single or specific value in variable list in constraint formulation

Hi Margi, Does that mean If I define SoC as a variable, I don't require to define BatteryPower as a variable? No, you still need to keep BatteryPower as a variable, because as you said it can tak...

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• Jaromił Najman
• 2024年09月06日 09:35
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1. コミュニティ
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3. Using a for loop for a single or specific value in variable list in constraint formulation

Thats correct. I understand but then how it is possible to calculate BatteryPower necessary for the objective function? BatteryPower is an optimization variable itself. This means that you can us...

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• Jaromił Najman
• 2024年09月06日 09:25
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1. コミュニティ
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3. Using a for loop for a single or specific value in variable list in constraint formulation

Hi Margi, Actually the variable is the BatteryPower and SoC is calculated from it.  This is correct, but if you want to compute SoC being dependent on an optimization variable, then SoC has to be...

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• Jaromił Najman
• 2024年09月06日 09:14
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1. コミュニティ
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3. Using a for loop for a single or specific value in variable list in constraint formulation

Hi Margi, You will need to introduce a bounded continuous \(\texttt{SoC_t}\) variable. # introduce variable SoC for every timestep tSoC = steel.addVars(time1, lb= SoC_MIN, ub = SoC_MAX, name="SoC")...

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• Jaromił Najman
• 2024年09月05日 14:16
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1. コミュニティ
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3. Add additional constraints but the objective decreased in minimize problem

Hi Runfeng, Thank you for your patience. We were able to identify the source of the issue and it will be fixed with the upcoming version 12 release, which is planned for the end of the year. Unfort...

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• Jaromił Najman
• 2024年09月05日 09:58
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1. コミュニティ
2. Modeling
3. I am facing Issues with Convergence in Mixed-Integer Programming Model Using Gurobi

Hi Jack, We provide some general advice in the section about Most important parameters. However, these are quite generic. Could you please share the log output for an optimization run or in best ca...

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• Jaromił Najman
• 2024年09月04日 07:58
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