Note
You can download this example as a Jupyter notebook or start it in interactive mode.
Flow Plot Example#
Here, we are going to import a network and plot the electricity flow
[1]:
import pypsa, os
import cartopy.crs as ccrs
import matplotlib.pyplot as plt
import pandas as pd
import warnings
from shapely.errors import ShapelyDeprecationWarning
warnings.filterwarnings("ignore", category=ShapelyDeprecationWarning)
plt.rc("figure", figsize=(10, 8))
Import and optimize a network#
[2]:
n = pypsa.examples.ac_dc_meshed(from_master=True)
n.lopf()
WARNING:pypsa.io:Importing network from PyPSA version v0.17.1 while current version is v0.22.1. Read the release notes at https://pypsa.readthedocs.io/en/latest/release_notes.html to prepare your network for import.
INFO:pypsa.io:Imported network ac-dc-meshed.nc has buses, carriers, generators, global_constraints, lines, links, loads
INFO:pypsa.linopf:Prepare linear problem
INFO:pypsa.linopf:Total preparation time: 0.19s
INFO:pypsa.linopf:Solve linear problem using Glpk solver
INFO:pypsa.linopf:Optimization successful. Objective value: -3.47e+06
[2]:
('ok', 'optimal')
Get mean generator power by bus and carrier:
[3]:
gen = n.generators.assign(g=n.generators_t.p.mean()).groupby(["bus", "carrier"]).g.sum()
Plot the electricity flows:
[4]:
# links are not displayed for prettier output ('link_widths=0')
n.plot(
bus_sizes=gen / 5e3,
bus_colors={"gas": "indianred", "wind": "midnightblue"},
margin=0.5,
flow="mean",
line_widths=0.1,
link_widths=0,
)
plt.show()
/home/docs/checkouts/readthedocs.org/user_builds/pypsa/conda/latest/lib/python3.11/site-packages/cartopy/mpl/style.py:76: UserWarning: facecolor will have no effect as it has been defined as "never".
warnings.warn('facecolor will have no effect as it has been '

Plot the electricity flows with a different projection and a colored map:
[5]:
# links are not displayed for prettier output ('link_widths=0')
n.plot(
bus_sizes=gen / 5e3,
bus_colors={"gas": "indianred", "wind": "midnightblue"},
margin=0.5,
flow="mean",
line_widths=0.1,
link_widths=0,
projection=ccrs.EqualEarth(),
color_geomap=True,
)
plt.show()
/home/docs/checkouts/readthedocs.org/user_builds/pypsa/conda/latest/lib/python3.11/site-packages/cartopy/mpl/style.py:76: UserWarning: facecolor will have no effect as it has been defined as "never".
warnings.warn('facecolor will have no effect as it has been '

Set arbitrary values as flow argument using the MultiIndex of n.branches()
:
[6]:
flow = pd.Series(10, index=n.branches().index)
[7]:
flow
[7]:
component name
Line 0 10
1 10
2 10
3 10
4 10
5 10
6 10
Link Norwich Converter 10
Norway Converter 10
Bremen Converter 10
DC link 10
dtype: int64
[8]:
# links are not displayed for prettier output ('link_widths=0')
n.plot(
bus_sizes=gen / 5e3,
bus_colors={"gas": "indianred", "wind": "midnightblue"},
margin=0.5,
flow=flow,
line_widths=2.7,
link_widths=0,
projection=ccrs.EqualEarth(),
color_geomap=True,
)
plt.show()
/home/docs/checkouts/readthedocs.org/user_builds/pypsa/conda/latest/lib/python3.11/site-packages/cartopy/mpl/style.py:76: UserWarning: facecolor will have no effect as it has been defined as "never".
warnings.warn('facecolor will have no effect as it has been '

Adjust link colors according to their mean load:
[9]:
# Pandas series with MultiIndex
# links are not displayed for prettier output ('link_widths=0')
collection = n.plot(
bus_sizes=gen / 5e3,
bus_colors={"gas": "indianred", "wind": "midnightblue"},
margin=0.5,
flow=flow,
line_widths=2.7,
link_widths=0,
projection=ccrs.EqualEarth(),
color_geomap=True,
line_colors=n.lines_t.p0.mean().abs(),
)
plt.colorbar(collection[2], fraction=0.04, pad=0.004, label="Flow in MW")
plt.show()
/home/docs/checkouts/readthedocs.org/user_builds/pypsa/conda/latest/lib/python3.11/site-packages/cartopy/mpl/style.py:76: UserWarning: facecolor will have no effect as it has been defined as "never".
warnings.warn('facecolor will have no effect as it has been '
