rdtools.normalization.normalize_with_pvwatts

rdtools.normalization.normalize_with_pvwatts(energy, pvwatts_kws)

Normalize system AC energy output given measured poa_global and meteorological data. This method uses the PVWatts V5 module model.

Energy timeseries and poa_global timeseries can be different granularities.

Parameters:

• energy (pd.Series) -- Energy time series to be normalized in watt hours. Must be a right-labeled regular time series.
• pvwatts_kws (dict) -- Dictionary of parameters used in the pvwatts_dc_power function. See Other Parameters.

Other Parameters:  

• poa_global (pd.Series) -- Total effective plane of array irradiance.
• power_dc_rated (float) -- Rated DC power of array in watts
• temperature_cell (pd.Series, optional) -- Measured or derived cell temperature [degrees Celsius]. Time series assumed to be same frequency as poa_global. If omitted, the temperature term will be ignored.
• poa_global_ref (float, default 1000) -- Reference irradiance at standard test condition [W/m**2].
• temperature_cell_ref (float, default 25) -- Reference temperature at standard test condition [degrees Celsius].
• gamma_pdc (float, default None) -- Linear array efficiency temperature coefficient [1 / degree Celsius]. If omitted, the temperature term will be ignored.

Note

All series are assumed to be right-labeled, meaning that the recorded value at a given timestamp refers to the previous time interval

Returns:

• energy_normalized (pd.Series) -- Energy divided by PVWatts DC energy.
• insolation (pd.Series) -- Insolation associated with each normalized point