Compare top-down Middenmeer forecasts to Middenmeer forecasts using Vattenfall T-forecasts 1-1

[MartijnCa]

DoR:

• https://github.com/alliander-opensource/AIFES/issues/48
• https://github.com/alliander-opensource/AIFES/issues/49

Acceptance criteria:

• [x] Backtest forecasts have been generated for the aggregated load on OS Middenmeer (repeated and stored 10 times)
• [x] Backtest forecasts have been generated for the aggregated load on OS Middenmeer minus the C-ARM measurements of Vattenfall and the T-forecasts for OS Middenmeer have been added (repeated and stored 10 times)
• [x] The resulting timeseries forecasts have been compared and comparison results have been documented
  • Comparison results include:
    • [x] Boxplots rMSE, rMSE lowest, rMAE, rMAE lowest
    • [x] Plots of realised and predicted load around the curtailment/incident moments