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Predefinition of comparisons

As in the case of hourly or daily on-line graphs, the parameters to be compared should be defined before the execution of the simulation. So that during the simulation, the output file can store the couples of asked values (measured and simulated).

For each comparison set, please choose:

  • the parameter to be compared from the measured parameter's list
  • the time interval and types of values to be accumulated (hourly, daily or monthly)
  • you can impose some conditions for the accumulation: several conditions can simultaneously be specified:
    • Horizontal or Incident global irradiation > 20W/m², in order to be limited to day-time values.
    • Cuts of one, two or three hours after sunrise and before sunset.
    • Selection of hours (mid-day).
    • Eliminations of marked data (break-downs), explicitly eliminated in the comparison graphs or the tables.
    • Running of inverter for grid system, or production of PV-field in case of stand-alone system.
    • Cuts according to the values of another measured variable, or a simulated variable chosen from among the 70 parameters calculated by the simulation.
    • For example, this last option allows for the selection of the measurement points with a strong beam or pure diffuse irradiation (by asking "Diff/Glob Ratio"<25%, resp. >70%).
  • Then give a name to the accumulation (you can use the speed button on the right for predefined name).

After having defined as many comparisons as necessary, the simulation is started exactly in the same way as for the usual simulation. It follows the same process, on the basis of the meteorological data of the measurements file instead of those of the weather data of the project. At each time-step, and according to the specified conditions, it accumulates comparison data asked for above.