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Merge pull request #412 from PyPSA/fix-simplify-alternative

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Fix line voltages alterantive
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Martha Frysztacki 2022-09-05 13:38:11 +02:00 committed by GitHub
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2 changed files with 22 additions and 16 deletions
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2
doc/release_notes.rst
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@ -12,6 +12,8 @@ Upcoming Release
* Add functionality to consider shipping routes when calculating the available area for offshore technologies. Data for the shipping density comes from the `Global Shipping Traffic Density dataset <https://datacatalog.worldbank.org/search/dataset/0037580/Global-Shipping-Traffic-Density>`
* When fixing line voltages to 380kV, the workflow now preserves the transmission capacity instead of the electrical impedance and reactance.
PyPSA-Eur 0.5.0 (27th July 2022)
=====================================

28
scripts/simplify_network.py
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@ -105,26 +105,30 @@ logger = logging.getLogger(__name__)
def simplify_network_to_380(n):
## All goes to v_nom == 380
"""
Fix all lines to a voltage level of 380 kV and remove all transformers.
The function preserves the transmission capacity for each line while updating
its voltage level, line type and number of parallel bundles (num_parallel).
Transformers are removed and connected components are moved from their
starting bus to their ending bus. The corresponing starting buses are
removed as well.
"""
logger.info("Mapping all network lines onto a single 380kV layer")
n.buses['v_nom'] = 380.
linetype_380, = n.lines.loc[n.lines.v_nom == 380., 'type'].unique()
lines_v_nom_b = n.lines.v_nom != 380.
n.lines.loc[lines_v_nom_b, 'num_parallel'] *= (n.lines.loc[lines_v_nom_b, 'v_nom'] / 380.)**2
n.lines.loc[lines_v_nom_b, 'v_nom'] = 380.
n.lines.loc[lines_v_nom_b, 'type'] = linetype_380
n.lines.loc[lines_v_nom_b, 's_nom'] = (
np.sqrt(3) * n.lines['type'].map(n.line_types.i_nom) *
n.lines.bus0.map(n.buses.v_nom) * n.lines.num_parallel
)
n.lines['type'] = linetype_380
n.lines["v_nom"] = 380
n.lines["i_nom"] = n.line_types.i_nom[linetype_380]
n.lines['num_parallel'] = n.lines.eval("s_nom / (sqrt(3) * v_nom * i_nom)")
# Replace transformers by lines
trafo_map = pd.Series(n.transformers.bus1.values, index=n.transformers.bus0.values)
trafo_map = pd.Series(n.transformers.bus1.values, n.transformers.bus0.values)
trafo_map = trafo_map[~trafo_map.index.duplicated(keep='first')]
several_trafo_b = trafo_map.isin(trafo_map.index)
trafo_map.loc[several_trafo_b] = trafo_map.loc[several_trafo_b].map(trafo_map)
trafo_map[several_trafo_b] = trafo_map[several_trafo_b].map(trafo_map)
missing_buses_i = n.buses.index.difference(trafo_map.index)
missing = pd.Series(missing_buses_i, missing_buses_i)
trafo_map = pd.concat([trafo_map, missing])