Systematic Bias of Area 1 real-time load

[claytonpbarrows]

From @crphilbrick

PROBLEM: Real-time (RT) loads for Area 1 are approximately 140 MW lower than day-ahead (DA) loads in all hours. Also, RT loads show a significant dip at the peak of each day.

RESOLUTION: RT loads for Area 1 have been set equal to DA loads. The original RT loads are still available in the data, but are not used.

JUSTIFICATION: Because load forecasts are typically quite accurate (e.g., <3% MSE) and because forecast errors of wind and solar are typically much larger than load forecast errors.