iiasa
Sub-annual time step compatibility
With @behnam2015 we went through the model core and highlighted parts of code that are not yet including sub-annual time steps and this feature might be useful.
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Equations where time is missing but it is probably not necessary: EXTRACTION_EQUIVALENCE, RESOURCE_CONSTRAINT, STOCKS_BALANCE and related OPERATION_CONSTRAINT, MIN_UTILIZATION_CONSTRAINT
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Equations where time is missing and it would make sense to have it. However, it would lead to backwards incompatibility issues EMISSION_EQUIVALENCE, EMISSION_CONSTRAINT RELATION_EQUIVALENCE
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We also highlighted parts that might be incompatible or that might not be flexible to set year-to-substep mappings. For example in the commodity balance the demand can be yearly and the supply at the sub-annual time level. We are not sure if this is true for other blocks of equations and we think some others' opinion is necessary. ADDON_ACTIVITY_LO and _UP SHARE_CONSTRAINT_COMMODITY_UP and other share constraints RENEWABLES_EQUIVALENCE, SYSTEM_RELIABILITY_CONSTRAINT, SYSTEM_FLEXIBILITY_CONSTRAINT and all renewable related equations
In terms of compatibility, I am not sure if renewable_capacity_factor should have time in it. If it is simply a multiplier at different grades and the variability in renewable capacity factor can be expressed in capacity_factor, then it should be fine.
@ Adriano, I'd like us to pick this and tackle the issues one by one. As the first step, I will create a separate discussion for the third bullet point (commodity balance equation and timesteps).
