pvanalytics.features.snow.get_transmission#
- pvanalytics.features.snow.get_transmission(measured_e_e, modeled_e_e, current_dc)#
Estimate transmission as the ratio of modeled effective irradiance to measured irradiance.
Measured irradiance should be in the array’s plane and represent snow-free conditions. For example, the measured irradiance could be obtained with a heated plane-of-array pyranometer. When necessary, the irradiance should be adjusted for reflections and spectral content.
- Parameters
measured_e_e (array-like) – Plane-of-array irradiance without the effect of snow. [W/m2]
modeled_e_e (array-like) – Effective irradiance modeled from measured current at maximum power. [W/m2]
current_dc (array-like) – Measured DC current at the resolution of a single module. [A]
- Returns
T – Effective transmission. [unitless] Returns NaN where measured DC current is NaN and where measured irradiance is zero. Returns zero where measured current is zero. Returns 1 where the ratio between measured and modeled irradiance exceeds 1.
- Return type
array-like
References
- 1
E. C. Cooper, J. L. Braid and L. Burnham, “Identifying the Electrical Signature of Snow in Photovoltaic Inverter Data,” 2023 IEEE 50th Photovoltaic Specialists Conference (PVSC), San Juan, PR, USA, 2023, pp. 1-5. DOI: 10.1109/PVSC48320.2023.10360065
