def _scaled_loads(net, load_level0, level):
    """
    This function passes the loads from kW to kg/s using the LHV parameter and add the load linked
    to the station of the lower pressure network
    :param the pandangas network
    :param load_level0: the load from this level in a Dataframe
    :param lhv: param to pass from kW to kg/s
    :param level: the gas level (string)
    :return: load_level with a new column load
    """
    load_level = load_level0.copy()
    load_level.loc[:, ('load_kg_s')] = load_level.loc[:, ('scaling')
        ] * load_level.loc[:, ('p_kW')] / net.lhv
    for _, row in net.res_station.iterrows():
        bushigh = net.station.at[row.name, 'bus_high']
        if net.bus.loc[bushigh, 'level'] == level:
            load_level.loc[bushigh, 'load_kg_s'] = abs(round(row[0], net.
                solver_option['round_num']))
    total_loads = sum(load_level['load_kg_s'])
    return load_level, total_loads
