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

Updating constraints for maximum share of reserve provision, ROCOF limit, as well as reserve demand caused by largest unit infeed and largest transfer link import/export. Testing one constraint for reserve demand caused by largest transfer link import/export (instead of two separate constraints).

First tests, disabling all reserve requirement constraints except q_resDemand. Adding some new parameters and sets (df_reservesGroup, restypeDirectionGroup, restypeDirectionGridNodeGroup) and changing the dimensions of some other parameters, sets and variables.

Updating the two ROCOF constraints so that they apply to a group of nodes instead of individual nodes.

The transfer ROCOF constraint considers failures of interconnectors with one end inside the group and one end outside the group. 'DefaultFrequency' and 'ROCOF' are now p_groupPolicy parameters instead of p_gn parameters.

First try to fix issue #97.

Adding a new constraint q_maxDownward2 and modifying q_rampDownLimit. A small change to v_reserve.up to make it work with consumption units as well.

q_maxDownward2: similar to q_maxUpward2 but for v_gen and downward online+offline reserve provision

q_rampDownLimit: do not consider offline reserve provision

q_maxUpward: Moving "not nuOfflineRescapable(restype, node, unit)" from equation condition to a condition for summing reserve variables

q_maxUpward2: Removing many of the equation conditions (does not apply to consumption units, for example), cleaning up terms in the equation (hopefully not removing anything that should have stayed)

q_maxUpward3: Not sure if this constraint is needed, so ignoring it in invest and schedule models -- can be included again if needed

q_reserveProvision2: Some refinements to the equation conditions and the equation terms in order to make the constraint limit the online reserve provision of units with online variables

q_rampUpLimit: Moving "not nuOfflineRescapable(restype, node, unit)" from equation condition to a condition for summing reserve variables

q_rampUpLimit2: Not sure if this constraint is needed, so ignoring it in invest and schedule models -- can be included again if needed.

ran li authored Sep 03, 2019 and ran li committed Sep 03, 2019

Now the ReserveShareMax could control its reserve type and direction with the newly introduced p_nReserves3D which should also be reflected as a new sheet in the excel file.

added unitcount to maxupward2. Changed rampuplimit2 to exclude the offline reserve rather than exclude online variable

Added a conditional to the equation and added the portion_of_transfer_to_reserve also to reserve transfers.

Modified version of the interconnector N-1 reserve requirement. Only upward need considered. Not tested at all.

ran li authored Aug 27, 2019 and ran li committed Aug 27, 2019

The reserve for largest interconnector(transmission line) is included, with separate equations for up and down reserve

A fix to issue #86: Adding gnuft condition as well as removing unit_investLP and unit_investMIP conditions and p_unit(unit, 'unitCount') from q_inertiaMin. Using p_unit(unit, 'unitCount') causes division by zero problems for units with investment variables and without online variables.

Adding gnuft condition to five other equations as well: q_instantaneousShareMax, q_capacityMargin, q_energyShareMax, q_energyShareMin and q_minCons. Using unit aggregation and these equations without the gnuft condition might have caused problems.

Fixing ramp constraints so that they work when integer investment variables are used together with continuous online variables (issue #88).

ran li authored Jul 10, 2019 and ran li committed Jul 10, 2019

Ciara's codes:minCons constraint allows to set the min load for PHS while still allowing foll reserve

Fixing a bug in ramp tier limits: For units with shutdown trajectories, the ramp tier limit was twofold at the interval when the shutdown begins.