.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "generated/gallery/irradiance-quality/component-sum-irradiance.py" .. LINE NUMBERS ARE GIVEN BELOW. .. only:: html .. note:: :class: sphx-glr-download-link-note Click :ref:`here ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_generated_gallery_irradiance-quality_component-sum-irradiance.py: Component Sum Equations for Irradiance Data =========================================== Estimate GHI, DHI, and DNI using the component sum equations, with nighttime corrections. .. GENERATED FROM PYTHON SOURCE LINES 10-13 Estimating GHI, DHI, and DNI using the component sum equations is useful if the associated field is missing, or as a comparison to an existing physical data stream. .. GENERATED FROM PYTHON SOURCE LINES 13-21 .. code-block:: default import pvanalytics from pvanalytics.quality.irradiance import calculate_component_sum_series import pvlib import matplotlib.pyplot as plt import pandas as pd import pathlib .. GENERATED FROM PYTHON SOURCE LINES 22-25 First, read in data from the RMIS NREL system. This data set contains 5-minute right-aligned data. It includes POA, GHI, DNI, DHI, and GNI measurements. .. GENERATED FROM PYTHON SOURCE LINES 25-30 .. code-block:: default pvanalytics_dir = pathlib.Path(pvanalytics.__file__).parent rmis_file = pvanalytics_dir / 'data' / 'irradiance_RMIS_NREL.csv' data = pd.read_csv(rmis_file, index_col=0, parse_dates=True) .. GENERATED FROM PYTHON SOURCE LINES 31-35 Now generate solar zenith estimates for the location, based on the data's time zone and site latitude-longitude coordinates. This is done using the :py:func:`pvlib.solarposition.get_solarposition` function. .. GENERATED FROM PYTHON SOURCE LINES 35-44 .. code-block:: default latitude = 39.742 longitude = -105.18 time_zone = "Etc/GMT+7" data = data.tz_localize(time_zone) solar_position = pvlib.solarposition.get_solarposition(data.index, latitude, longitude) .. GENERATED FROM PYTHON SOURCE LINES 45-48 Get the clearsky DNI values associated with the current location, using the :py:func:`pvlib.solarposition.get_solarposition` function. These clearsky values are used to calculate DNI data. .. GENERATED FROM PYTHON SOURCE LINES 48-51 .. code-block:: default site = pvlib.location.Location(latitude, longitude, tz=time_zone) clearsky = site.get_clearsky(data.index) .. GENERATED FROM PYTHON SOURCE LINES 52-54 Use :py:func:`pvanalytics.quality.irradiance.calcuate_ghi_component` to estimate GHI measurements using DHI and DNI measurements .. GENERATED FROM PYTHON SOURCE LINES 54-62 .. code-block:: default component_sum_ghi = calculate_component_sum_series( solar_zenith=solar_position['zenith'], dhi=data['irradiance_dhi__7983'], dni=data['irradiance_dni__7982'], zenith_limit=90, fill_night_value='equation') .. GENERATED FROM PYTHON SOURCE LINES 63-65 Plot the 'irradiance_ghi__7981' data stream against the estimated component sum GHI, for comparison .. GENERATED FROM PYTHON SOURCE LINES 65-74 .. code-block:: default data['irradiance_ghi__7981'].plot() component_sum_ghi.plot() plt.legend(labels=["RMIS GHI", "Component Sum GHI"], loc="upper left") plt.xlabel("Date") plt.ylabel("GHI (W/m^2)") plt.tight_layout() plt.show() .. image-sg:: /generated/gallery/irradiance-quality/images/sphx_glr_component-sum-irradiance_001.png :alt: component sum irradiance :srcset: /generated/gallery/irradiance-quality/images/sphx_glr_component-sum-irradiance_001.png :class: sphx-glr-single-img .. GENERATED FROM PYTHON SOURCE LINES 75-77 Use :py:func:`pvanalytics.quality.irradiance.calcuate_dhi_component` to estimate DHI measurements using GHI and DNI measurements .. GENERATED FROM PYTHON SOURCE LINES 77-85 .. code-block:: default component_sum_dhi = calculate_component_sum_series( solar_zenith=solar_position['zenith'], dni=data['irradiance_dni__7982'], ghi=data['irradiance_ghi__7981'], zenith_limit=90, fill_night_value='equation') .. GENERATED FROM PYTHON SOURCE LINES 86-88 Plot the 'irradiance_dhi__7983' data stream against the estimated component sum GHI, for comparison .. GENERATED FROM PYTHON SOURCE LINES 88-97 .. code-block:: default data['irradiance_dhi__7983'].plot() component_sum_dhi.plot() plt.legend(labels=["RMIS DHI", "Component Sum DHI"], loc="upper left") plt.xlabel("Date") plt.ylabel("GHI (W/m^2)") plt.tight_layout() plt.show() .. image-sg:: /generated/gallery/irradiance-quality/images/sphx_glr_component-sum-irradiance_002.png :alt: component sum irradiance :srcset: /generated/gallery/irradiance-quality/images/sphx_glr_component-sum-irradiance_002.png :class: sphx-glr-single-img .. GENERATED FROM PYTHON SOURCE LINES 98-100 Use :py:func:`pvanalytics.quality.irradiance.calcuate_dni_component` to estimate DNI measurements using GHI and DHI measurements .. GENERATED FROM PYTHON SOURCE LINES 100-109 .. code-block:: default component_sum_dni = calculate_component_sum_series( solar_zenith=solar_position['zenith'], dhi=data['irradiance_dhi__7983'], ghi=data['irradiance_ghi__7981'], dni_clear=clearsky['dni'], zenith_limit=90, fill_night_value='equation') .. GENERATED FROM PYTHON SOURCE LINES 110-112 Plot the 'irradiance_dni__7982' data stream against the estimated component sum GHI, for comparison .. GENERATED FROM PYTHON SOURCE LINES 112-120 .. code-block:: default data['irradiance_dni__7982'].plot() component_sum_dni.plot() plt.legend(labels=["RMIS DNI", "Component Sum DNI"], loc="upper left") plt.xlabel("Date") plt.ylabel("DNI (W/m^2)") plt.tight_layout() plt.show() .. image-sg:: /generated/gallery/irradiance-quality/images/sphx_glr_component-sum-irradiance_003.png :alt: component sum irradiance :srcset: /generated/gallery/irradiance-quality/images/sphx_glr_component-sum-irradiance_003.png :class: sphx-glr-single-img .. rst-class:: sphx-glr-timing **Total running time of the script:** ( 0 minutes 0.762 seconds) .. _sphx_glr_download_generated_gallery_irradiance-quality_component-sum-irradiance.py: .. only:: html .. container:: sphx-glr-footer sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: component-sum-irradiance.py ` .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: component-sum-irradiance.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_