I’ve entered values for RRL and XXL for all my transmission lines. Why are there no line losses after running a scenario? As long as there is resistance, there should be non-zero line losses right?
Hi @smeloney,
Great question! Are your running an AC power flow (ACPF) scenario, or a production cost model (DCUCOPF) scenario?
This property will be used in an ACPF scenario and losses will be calculated.
This property will not be used in a production cost model because it would add non-linear terms to the constraints. While mixed-integer non-linear programming is possible, the application of this technique is rare in the electric power industry due to the size of the optimization problems typically solved by grid operators. SAInt only supports mixed-integer linear programming (MIP), as is the standard in the industry.
If you want to model losses in your production cost model, you can run an ACPF scenario and embed the losses in the load in your PCM, or you can try using the INCLUDELOSS event for production cost modeling scenarios.
Keep in mind you can always check which properties are used in which scenarios by checking the documentation.
Happy modeling!
Ah yes I was running DCUCOPF. This answer makes a lot of sense though. For future runs I will implement this advice, thank you!