data.datasets.electrical_neighbours.cross_border_lines()

Complexity

Conditions

8

Size

Total Lines	145
Code Lines	65

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

"""The central module containing all code dealing with electrical neighbours
def cross_border_lines(scenario, sources, targets, central_buses):
    """Adds lines which connect border-crossing lines from osmtgmod
    to the central buses in the corresponding neigbouring country

    Parameters
    ----------
    sources : dict
        List of dataset sources
    targets : dict
        List of dataset targets
    central_buses : geopandas.GeoDataFrame
        Buses in the center of foreign countries

    Returns
    -------
    new_lines : geopandas.GeoDataFrame
        Lines that connect cross-border lines to central bus per country

    """
    # Delete existing data
    db.execute_sql(
        f"""
        DELETE FROM {targets['lines']['schema']}.
        {targets['lines']['table']}
        WHERE scn_name = '{scenario}'
        AND line_id NOT IN (
            SELECT branch_id
            FROM  {sources['osmtgmod_branch']['schema']}.
            {sources['osmtgmod_branch']['table']}
              WHERE result_id = 1 and (link_type = 'line' or
                                       link_type = 'cable'))
        AND bus0 IN (
            SELECT bus_i
            FROM  {sources['osmtgmod_bus']['schema']}.
            {sources['osmtgmod_bus']['table']})
        AND bus1 NOT IN (
            SELECT bus_i
            FROM  {sources['osmtgmod_bus']['schema']}.
            {sources['osmtgmod_bus']['table']})
        """
    )

    # Calculate cross-border busses and lines from osmtgmod
    foreign_buses = get_cross_border_buses(scenario, sources)
    foreign_buses.dropna(subset="country", inplace=True)

    if config.settings()["egon-data"]["--dataset-boundary"] == "Everything":
        foreign_buses = foreign_buses[foreign_buses.country != "DE"]
    lines = get_cross_border_lines(scenario, sources)

    # Select bus outside of Germany from border-crossing lines
    lines.loc[
        lines[lines.bus0.isin(foreign_buses.bus_id)].index, "foreign_bus"
    ] = lines.loc[lines[lines.bus0.isin(foreign_buses.bus_id)].index, "bus0"]
    lines.loc[
        lines[lines.bus1.isin(foreign_buses.bus_id)].index, "foreign_bus"
    ] = lines.loc[lines[lines.bus1.isin(foreign_buses.bus_id)].index, "bus1"]

    # Drop lines with start and endpoint in Germany
    lines = lines[lines.foreign_bus.notnull()]
    lines.loc[:, "foreign_bus"] = lines.loc[:, "foreign_bus"].astype(int)

    # Copy all parameters from border-crossing lines
    new_lines = lines.copy().set_crs(4326)

    # Set bus0 as foreign_bus from osmtgmod
    new_lines.bus0 = new_lines.foreign_bus.copy()
    new_lines.bus0 = new_lines.bus0.astype(int)

    # Add country tag and set index
    new_lines["country"] = (
        foreign_buses.set_index("bus_id")
        .loc[lines.foreign_bus, "country"]
        .values
    )

    if config.settings()["egon-data"]["--dataset-boundary"] == "Everything":
        new_lines = new_lines[~new_lines.country.isnull()]
    new_lines.line_id = range(
        db.next_etrago_id("line"), db.next_etrago_id("line") + len(new_lines)
    )

    # Set bus in center of foreign countries as bus1
    for i, row in new_lines.iterrows():
        print(row)
        new_lines.loc[i, "bus1"] = central_buses.bus_id[
            (central_buses.country == row.country)
            & (central_buses.v_nom == row.v_nom)
        ].values[0]

    # Create geometry for new lines
    new_lines["geom_bus0"] = (
        foreign_buses.set_index("bus_id").geom[new_lines.bus0].values
    )
    new_lines["geom_bus1"] = (
        central_buses.set_index("bus_id").geom[new_lines.bus1].values
    )
    new_lines["topo"] = new_lines.apply(
        lambda x: LineString([x["geom_bus0"], x["geom_bus1"]]), axis=1
    )

    # Set topo as geometry column
    new_lines = new_lines.set_geometry("topo").set_crs(4326)
    # Calcultae length of lines based on topology
    old_length = new_lines["length"].copy()
    new_lines["length"] = new_lines.to_crs(3035).length / 1000

    if (new_lines["length"] == 0).any():
        print("WARNING! THERE ARE LINES WITH LENGTH = 0")
        condition = new_lines["length"] != 0
        new_lines["length"] = new_lines["length"].where(condition, 1)
        

    # Set electrical parameters based on lines from osmtgmod
    for parameter in ["x", "r"]:
        new_lines[parameter] = (
            new_lines[parameter] / old_length * new_lines["length"]
        )
    for parameter in ["b", "g"]:
        new_lines[parameter] = (
            new_lines[parameter] * old_length / new_lines["length"]
        )


    # Drop intermediate columns
    new_lines.drop(
        ["foreign_bus", "country", "geom_bus0", "geom_bus1", "geom"],
        axis="columns",
        inplace=True,
    )

    new_lines = new_lines[new_lines.bus0 != new_lines.bus1]

    new_lines["cables"] = new_lines["cables"].apply(int)

    # Insert lines to the database
    new_lines.to_postgis(
        targets["lines"]["table"],
        schema=targets["lines"]["schema"],
        if_exists="append",
        con=db.engine(),
        index=False,
    )

    return new_lines