Updates the decision variable CurtailGen so that economic curtailment is only allowed when LMP prices are negative.
In reality the only time that an operator would choose to economically curtail a generator is when LMP prices are <= 0.
Enforcing this constraint also prevents curtailment from being used excessively by the model to satisfy other constraints.
For example, when limiting the amount of excess generation allowed, previously the model could just curtail a lot of generation
even when LMP prices were positive, even though this would not be realistic behavior.
To limit curtailment, we take an approach similar to how we limit DispatchGen to be <= an upper limit that is defined by its
variable_capacity_factor and installed capacity. We create a new variable curtailment_capacity_factor which is set equal
to variable_capacity_factor when the LMP prices at a generator node are <= 0, and set to zero when prices are positive. This
new variable is defined in variable_capacity_factors.csv.
To limit curtailment, we set the constraint CurtailGen[g,t] <= GenCapacityInTP * gen_availability * curtailment_capacity_factor
for each g, t.
Commit 2022.07.11 (Version 0.22.1)
Updates the decision variable
CurtailGenso that economic curtailment is only allowed when LMP prices are negative. In reality the only time that an operator would choose to economically curtail a generator is when LMP prices are <= 0. Enforcing this constraint also prevents curtailment from being used excessively by the model to satisfy other constraints. For example, when limiting the amount of excess generation allowed, previously the model could just curtail a lot of generation even when LMP prices were positive, even though this would not be realistic behavior.To limit curtailment, we take an approach similar to how we limit
DispatchGento be <= an upper limit that is defined by itsvariable_capacity_factorand installed capacity. We create a new variablecurtailment_capacity_factorwhich is set equal tovariable_capacity_factorwhen the LMP prices at a generator node are <= 0, and set to zero when prices are positive. This new variable is defined invariable_capacity_factors.csv.To limit curtailment, we set the constraint
CurtailGen[g,t] <= GenCapacityInTP * gen_availability * curtailment_capacity_factorfor each g, t.