GitLab

Set `t_realized(t)` has the realized time steps in the simulation (excluding the starting point and any extra horizon).
This is included in file *results.gdx* as symbol `t`.

Closes #81

Adding the grid dimension to the reserve parameters and variables. Changes required to the input files. Removing the obsolete nuft set. Issue #69.

Fixes to the diagnostic result vectors, as well as adding a command line argument to include them only when necessary.

Activating two equations in the schedule model and adding the dummy capacity to ensure capacity margin equation feasibility to the results file.

* taking investment costs into account in cost results calculation
* adding transfer link investment possibility sets
* moving run-up and shutdown trajectories into their own 'blocks' to speed up the model
* commenting out some forecast related sets that are not used anymore
* updating info file writing

Added fixed operation and maintenance costs for investment options
Adding a new parameter unitOutputCapacityTotal to avoid division by zero
Added unit investment result parameter
Removed equation q_fixedGenCap1U
Added default value calculation for reserves update frequency
Moved tCounter update outside ms loop in 3c_periodicLoop.gms
Updated the limits of v_invest_LP and v_invest_MIP (no more maxGenCap, minGenCap)
Updated investInit_temp.gms
And some smaller updates

Reorganizing the result calculation to improve performance by moving all possible calculations to the end of the solveloop.

Implementing more results arrays again. Reserves, unit online time and approximate utilization rates.

Implementing most of the results arrays from trtopi_develop_RealValue due to their overall usefulness.

Rewriting the efficiency approximation calculations, as well as reimplementing diagnostic COP and efficiency results.

Some minor readability and performance upgrades as well.

Fixing an isse of the online variables were not being recorded correctly, resulting in infeasibilities between solves.

Minor fixes to thew stored results, as well as only requiring upwards tertiary reserves to cover for the wind power fluctuations.

Variable values are wiped clean after each solve in order to conserve memory. References to previous variable values are now handled through the results parameters, e.g. "r_state". Additionally, initializing of the various sets, parameters etc. is now handled through the "Option clear" command, as I suspect it to be faster than the old method of resetting the values over the defined sets.

Before these changes, GAMS would occupy more and more memory the longer the model was set to run. This resulted in significant reduction of performance during simulations spanning e.g. a whole year with a large system, as every single variable value for each forecast time-step would be kept in memory, regardless of whether it was necessary for the current solve. In order to avoid this, temporary timeseries and variable values are now wiped clean between solves, and the desired results are committed to the results parameter arrays.

The results arrays will also bloat the memory requirements of each solve, but not as much as the unaltered variable values (and bounds). I imagine it would be possible to write these into some external file during the solve loop for safekeeping, and periodically wipe the results arrays as well in order to conserve memory for the calculations proper. However, this writing could slow the loop by itself, and might not be necessary for the current project work.

It seems that the equation values are still left in the debug file, and are presumably still carried along with the solves. Have to see if further changes are required to avoid unnecessary memory use.