Linearize Pyomo model with BigM Constraint Question: I may have answered my own question posted below with the following. I believe the construction is now appropriately linear and returns a feasible solution. Though I would appreciate any feedback as I am new to this. In replacement of the model.bigM_cons I outlined below, I have now …
How can I write a pyomo constraint/rule with conditions checked against boolean values within the model data? Question: I’m attempting to solve a battery problem using Pyomo. I’m attempting to tell the model that the battery can only discharge during certain hours of the year. I’ve implemented this by create a boolean column within my …
how to write a pyomo optimization to select optimal volume of renewables? Question: Background I am trying to write a pyomo optimization which takes in a customer’s electricity load and the generation data of several renewable projects, then optimally solves for the lowest cost selection of renewable projects to minimize electricity consumption, subject to a …
How to declare params in pyomo? Question: I am having a difficult with pyomo’s params declaration. I have a np array like I declared bellow, but it appear this error: KeyError: "Index ‘0’ is not valid for indexed component ‘c’. model = pyo.ConcreteModel() V = range(20) model.V = pyo.Set(initialize = V, doc = ‘Set: clients …
How to convert value of pyomo variable from float to int? Question: I’m working on an Task Scheduling problem given in Table 3 of paper Holistic energy awareness for intelligent drones. Table 3 In the 6th equation: N_d = E_d/B_d I want to convert floating value of (E_d/B_d) to an integer value of N_d. I’m …
Formulating the constraint x[i+1]<= x[i] in Pyomo Question: I have my decision variable x which is indexed on the list N. I want the constraint that x[i+1] <= x[i] or x[i] <= x[i-1]. But how do I do this in Pyomo without going out of range with my index? model.x = Var(N, within=NonNegativeReals) def constraint1(model, …
Variable definition as constraint in pyomo Question: This question is related to my previous question found here. I have managed to solve this problem (big thanks to @AirSquid!) My objective function is something like: So the avgPrice_n variable is indexed by n. However, it is actually defined as Meaning that it is indexed by n …
Pyomo Compatibility with Python 3.11 Question: Is there a known compatibility issue with pyomo and python 3.11? Just trying out the latest/greatest python release and importing pyomo is failing with pyomo v 6.4.2: Python 3.11.0 (v3.11.0:deaf509e8f, Oct 24 2022, 14:43:23) [Clang 13.0.0 (clang-1300.0.29.30)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> …
ModuleNotFoundError: No module named 'pyomo' Question: I am trying to run a jupyter notebook with pyomo, but get this error when trying to import from pyomo.environ. !sapt-get install -y -qq coinor-cbc from pyomo.environ import * E: Could not open lock file /var/lib/dpkg/lock-frontend – open (13: Permission denied) E: Unable to acquire the dpkg frontend lock …
Pyomo.extra installation fails Question: I have installed Anaconda from scratch and then installed pyomo, which worked. When I try to install pyomo.extra, it runs about 1/2 hour and then fails. I had tried: conda install -c conda-forge pyomo.extras conda install -c "conda-forge/label/cf201901" pyomo.extras conda install -c "conda-forge/label/cf202003" pyomo.extras as recommended on https://anaconda.org/conda-forge/pyomo.extras and also conda …
