documentation wind on-offshore

docs/data/electricity_supply.rst

@@ -19,9 +19,44 @@ The final distribution in the eGon2035 scenario is shown in figure :ref:`generat
 Onshore wind
 +++++++++++++
 
+The allocation of onshore wind power plants is implemented in the function :func:`insert<egon.data.datasets.power_plants.wind_farms.insert>`
+which is part of the dataset :class:`PowerPlants<egon.data.datasets.power_plants.PowerPlants>`.
+The following steps are conducted:
+
+#. The sites and capacities of exisitng onshore wind parks are imported using MaStR data (see :ref:`mastr-ref`).
+
+#. Potential areas for onshore wind parks are assumed to be areas With high mean wind speed, at the same time that some locations like protected natural areas or zones close to urban centers are discarted. Those areas are imported through the data bundle, see :ref:`data-bundle-ref`).
+
+#. The locations of existing parks and the potential areas are intersected with each other while considering a buffer around the locations of existing parks to find out where there are already parks at or close to potential areas. This results in a selection of potential areas.
+
+#. The capacities of the existing parks matching potential areas are summed up and compared to the target values for the specific scenario per federal state (see :ref:`concept-and-scenarios-ref`). The required expansion capacity is derived.
+
+#. If expansion of wind onshore capacity is required, capacities are calculated depending on the area size of the formerly selected potential areas. 21.05 MW/km² and 16.81 MW/km² are used for federal states in the north and in the south of the country respectively. The resulting parks are therefore located on the selected potential areas.
+
+#. The resulting capacities are compared to the target values for the specific scenario per federal state. If the target value is exceeded, a linear downscaling is conducted. If the target value is not reached yet, the remaining capacity is distributed linearly among the rest of the potential areas within the state. 
+
 Offshore wind
 ++++++++++++++
 
+The allocation of offshore wind power plants is implemented in the function :func:`insert<egon.data.datasets.power_plants.wind_offshore.insert>`
+which is part of the dataset :class:`PowerPlants<egon.data.datasets.power_plants.PowerPlants>`.
+The following steps are conducted:
+
+#. A compilation of offshore wind parks for different scenarios created by NEP are extracted from the data bundle. See :ref:`data-bundle-ref`. This data includes installed capacities, connection points (or a potential one for future power plants) and location. See figure :ref:`offshore_power_plants_areas`.
+
+#. Each connection point is matched to one of the substations previously created. Despite the fact that the generators are located in the sea, all the power generated by them will be injected into the grid through these substations, that in some cases can be several kilometers in land.
+
+#. For the eGon100RE scenario, the installed capacities are scaled up in order to achieve the targed in :ref:`concept-and-scenarios-ref`.
+
+#. Each offshore wind power plant receives an hourly maximal generation capacity based on weather data for its own geographical location. Weather data provided by ERA5.
+
+.. figure:: /images/offshore_power_plants_areas.png
+  :name: offshore_power_plants_areas
+  :width: 400 
+
+  Areas for offshore wind park in North and Baltic sea. Source: NEP
+
+
 PV ground mounted
 ++++++++++++++++++