05-03-2022, 01:45 AM
Dear VEDA Support Forum Members,
I am a new VEDA user and this is my first post, so please let me know how I can better ask this question. I am running a model that has both an all-sector carbon tax and a Zero Emission Vehicle mandate. I based the carbon tax on the Demo instructions and the ZEV mandate on the examples given in the forum thread called "Modeling investments and mandates." In my model, the mandate applies to new capacity for heavy-duty vehicles, requiring 30% of new capacity to be electric in 2030 and 100% to be electric in 2050, rising linearly. I started with a carbon tax of $25/ton in 2025 rising to $100/ton in 2050. I ran combinations of the tax and the mandate and all cases completed in about 25 minutes each. Then, I tried a higher tax of $100/ton in 2025 rising to $340/ton by 2050. I was able to run a scenario with this higher tax and no mandate, but I started to get issues when I tried the higher tax with the mandate. The model would run for 13 hours and then give up, reporting "intermediate infeasible." I am not sure where the conflict is, but hope that someone here might have an idea of what's wrong.
I've attached my ZEV mandate file, my carbon tax file, and my heavy-duty vehicle UC_COMPRD constraint file (I've set most constraints to 0 to clear room for electric technologies). Note that the model period is 2010-2077. The mandate covers TBS (school bus), TBT (transit bus), TC (commercial truck), TM (medium-duty truck), THS (heavy-duty short-haul truck), and THL (heavy-duty long-haul truck) sectors. Please let me know if there is other information I can provide.
Thank you very much!
I am a new VEDA user and this is my first post, so please let me know how I can better ask this question. I am running a model that has both an all-sector carbon tax and a Zero Emission Vehicle mandate. I based the carbon tax on the Demo instructions and the ZEV mandate on the examples given in the forum thread called "Modeling investments and mandates." In my model, the mandate applies to new capacity for heavy-duty vehicles, requiring 30% of new capacity to be electric in 2030 and 100% to be electric in 2050, rising linearly. I started with a carbon tax of $25/ton in 2025 rising to $100/ton in 2050. I ran combinations of the tax and the mandate and all cases completed in about 25 minutes each. Then, I tried a higher tax of $100/ton in 2025 rising to $340/ton by 2050. I was able to run a scenario with this higher tax and no mandate, but I started to get issues when I tried the higher tax with the mandate. The model would run for 13 hours and then give up, reporting "intermediate infeasible." I am not sure where the conflict is, but hope that someone here might have an idea of what's wrong.
I've attached my ZEV mandate file, my carbon tax file, and my heavy-duty vehicle UC_COMPRD constraint file (I've set most constraints to 0 to clear room for electric technologies). Note that the model period is 2010-2077. The mandate covers TBS (school bus), TBT (transit bus), TC (commercial truck), TM (medium-duty truck), THS (heavy-duty short-haul truck), and THL (heavy-duty long-haul truck) sectors. Please let me know if there is other information I can provide.
Thank you very much!