Juha Kiviluoma

Investment variable for node injection

1

From a discussion in Amsterdam: It would be possible to reduce two variables from a situation where one want to limit the total injection from multiple sources into a node....

Implement multi-year investments

2

- [ ] Propose new formulation - [ ] Check everyone agrees on formulation on paper (give 2 weeks for comments) - [ ] Implement in code - [ ]...

Economic lifetime of a unit

4

There is now greater than constraint in economic lifetime of a unit. It should probably be equality to remove the unit after unit lifetime. Also - the end of horizon...

One variable and two variable flows

1

Currently all flows between two nodes (through connection) have four variables - sometimes enough to have two or one

Variable scaling

5

I just scaled FlexTool variables to be of similar size, since there were some models that took very long time to solve using HiGHS. To my surprise, this improved LP...

Removing unnecessary parameters

1

From discussion in Amsterdam: In some places in the model variables are multiplied with a parameter to indicate whether it's needed or not. This is extra work for the presolver...

Non-linear constraint for the gas flows (SOS2)

1

Available formulation: Correa-Posada... SOS2 support may be solver dependent so careful with the implementation.

Advance or delay consumption from a profile

1

Advance or delay consumption from a profile. This could be with a price or with a recovery.

RTS test system to SpineOpt

1

In order to test SpineOpt against the RTS test system and also to increase SpineOpt's visibility, we should make it possible to run RTS test system in SpineOpt and include...