I have tried to use the maximum capacity build to constrain the future plant capacities but now i am having errors has explained in the attached screen shots attached and seek your guidance .

Regards

What power plants, and in what increments, are you allowing LEAP to construct using the Endogenous Capacity variable? Do you see the error warning you of the problem with endogenous capacity calculations even when you do not impose anything using the Max Built Capacity variable?

Feel free to attach your (*.leap) model to this thread. I'm not able to see a full picture of your transformation module in the screenshots you've included.

Taylor

The plants are various i.e hydro, solar thermal coal,and geothermal with differing capacities.In terms of the incremental addition my assumption is that leap should add any of the future plant to meet the growth in demand until available site capacities has been used.Further, the model should export when there is excess capacity and import to meet the short fall once all available capacity has been utilized .When i do not impose capacity constraint as per site potential in max built capacity there is no error excerpt the model attempts add to capacity which are not realistically available at site to meet the demand and returns zero import and export.

Regards

Very sorry it's taken me so long to find time to reply. From your screenshots, I'm not certain that we're seeing the effect of only one error. Are you certain that your energy demands are reasonable? Try visiting Basic Params and disabling the Transformation & Resources option, and then running for model (calculating demands only). Verify that demand is being calculated as expected, and once you're convinced, return to Basic Params to re-enable Transformation & Resources. Demand which is growing orders of magnitude too quickly is a leading cause of the error message you are seeing.

The Maximum Built Capacity variable will affect only those processes which are added using the Endogenous Capacity variable. These endogenously-added processes will be added in order of their Build Order, adding additional blocks of endogenous capacity only if their Maximum Built Capacity variable has not yet been exceeded. I've suggest reviewing this help page.

If there is insufficient available capacity to meet the module's output fuel requirements, then by default LEAP will import the remainder. However, this is a setting which you control, and which you'll find for each of the Output Fuel branches in the module. Have a look here. Similarly, by default LEAP will export all surplus production, but only if the Export Surplus rule has been selected.

Taylor

The Max Built Capacity variable appears if you use the left/right blue arrows to adjust the Build Order, while viewing the Endogenous Capacity variable.

I understand your point about using conditional statements within expressions for Endogenous Capacity. I do the same thing myself quite often, and it's a perfectly good way to adjust endogenous additions over time.

Best,

Taylor

Great Taylor!, thanks.

I always thought this variable did not work. I will try.

Best Regards,

Fran.