pvanalytics.quality.irradiance.daily_insolation_limits#

pvanalytics.quality.irradiance.daily_insolation_limits(irrad, clearsky, daily_min=0.4, daily_max=1.25)#

Check that daily insolation lies between minimum and maximum values.

Irradiance measurements and clear-sky irradiance on each day are integrated with the trapezoid rule to calculate daily insolation.

Parameters

  • irrad (Series) – Irradiance measurements (GHI or POA).

  • clearsky (Series) – Clearsky irradiance.

  • daily_min (float, default 0.4) – Minimum ratio of daily insolation to daily clearsky insolation.

  • daily_max (float, default 1.25) – Maximum ratio of daily insolation to daily clearsky insolation.

Returns

True for values on days where the ratio of daily insolation to daily clearsky insolation is between daily_min and daily_max.

Return type

Series

Notes

The default limits (daily_max and daily_min) have been set for GHI and POA irradiance for systems with fixed azimuth and tilt. If you pass POA irradiance for a tracking system it is recommended that you increase daily_max to 1.35.

The default values for daily_min and daily_max were taken from the PVFleets QA Analysis project.

Examples using pvanalytics.quality.irradiance.daily_insolation_limits#

Clearsky Limits for Daily Insolation

Clearsky Limits for Daily Insolation

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