Allow for repeated solving with fixed investments

pommes-public / pommesinvest

A bottom-up fundamental investment model for the German electricity sector

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Allow for repeated solving with fixed investments #76

Closed jokochems closed 6 months ago

jokochems commented 1 year ago

In case duals shall be interpreted (as power prices), fix investments and resolve model.
Needs to be evaluated in combination with #74 resp. a fix for foreign capacities.

jokochems commented 11 months ago

While in principle this is functional, there are some numerical issues here.

When the model is resolved for a large instance, the lp files contains rows that contain something like 0 = 0.0004 ...

Thus, ultimately this leads the solver to detect model infeasibility. I have to think about a suitable way to address this ...

jokochems commented 11 months ago

I'll give it another shot using rounding of investment results and forcing them to be within bounds. If this fails as well, this will no longer be pursued.

jokochems commented 10 months ago

It is still not working. The reason for that is that non-negativity seems to be not ensured using the given rounding precision. I'll have to take one more look into that, I guess.

jokochems commented 10 months ago

I have an idea for an alternative solution:

One could read investment results from file and replace all the investment attributes by the respective nominal_value.
Since the nominal_value does change over time, one would have to alter the max time series as well accordingly.

I'll address that somewhat soon in a dedicated pull request.

jokochems commented 6 months ago

Closed as it is not further required / not working as needed.