PEVF Balance and validation

[MK1295]

For PEVF need to add check if it is balanced and if not then need to apply replacement strategy according to EMF requirements

[MK1295]

The substitution of the reference program for Day-Ahead process will follow as:

STEP 1. If the final reference program is not available or invalid, use the preliminary reference

program of the same energy delivery day.

STEP 2. If not available or invalid, use the CGMA final results of the same energy delivery

day.

STEP 3. If not available or invalid, use PEVF results from the previous energy delivery d

[MK1295]

Initial reference program finalized at 17:15h CE(S)T
Final CGMA document with PSLC results provided at 17:30h CE(S)T
The substitution of the reference program for two days ahead process will follow as:
STEP 1. If the final reference program is not available, use the initial reference program of
the same energy delivery day.
STEP 2. If not available, use the CGMA final results of the same energy delivery day from the
previous time horizon.

[gpoderys]

related to #294