"""
Code for transforming EIA data that pertains to more than one EIA Form.
This module helps normalize EIA datasets and infers additonal connections
between EIA entities (i.e. utilities, plants, units, generators...). This
includes:
- compiling a master list of plant, utility, boiler, and generator IDs that
appear in any of the EIA 860 or 923 tables.
- inferring more complete boiler-generator associations.
- differentiating between static and time varying attributes associated with
the EIA entities, storing the static fields with the entity table, and the
variable fields in an annual table.
The boiler generator association inferrence (bga) takes the associations
provided by the EIA 860, and expands on it using several methods which can be
found in :func:`pudl.transform.eia._boiler_generator_assn`.
"""
import importlib.resources
import logging
import networkx as nx
import numpy as np
import pandas as pd
import pudl
from pudl import constants as pc
logger = logging.getLogger(__name__)
def _occurrence_consistency(entity_id, compiled_df, col,
cols_to_consit, strictness=.7):
"""
Find the occurence of plants & the consistency of records.
We need to determine how consistent a reported value is in the records
across all of the years or tables that the value is being reported, so we
want to compile two key numbers: the number of occurances of the entity and
the number of occurances of each reported record for each entity. With that
information we can determine if the reported records are strict enough.
Args:
entity_id (list): a list of the id(s) for the entity. Ex: for a plant
entity, the entity_id is ['plant_id_eia']. For a generator entity,
the entity_id is ['plant_id_eia', 'generator_id'].
compiled_df (pandas.DataFrame): a dataframe with every instance of the
column we are trying to harvest.
col (str): the column name of the column we are trying to harvest.
cols_to_consit (list): a list of the columns to determine consistency.
This either the [entity_id] or the [entity_id, 'report_date'],
depending on whether the entity is static or annual.
strictness (float): How consistent do you want the column records to
be? The default setting is .7 (so 70% of the records need to be
consistent in order to accept harvesting the record).
Returns:
pandas.DataFrame: this dataframe will be a transformed version of
compiled_df with NaNs removed and with new columns with information
about the consistency of the reported values.
"""
# select only the colums you want and drop the NaNs
# we want to drop the NaNs because
# breakpoint()
col_df = compiled_df[entity_id + ['report_date', col, 'table']].copy()
if pc.column_dtypes["eia"][col] == pd.StringDtype():
nan_str_mask = (col_df[col] == "nan").fillna(False)
col_df.loc[nan_str_mask, col] = pd.NA
col_df = col_df.dropna()
if len(col_df) == 0:
col_df[f'{col}_consistent'] = pd.NA
col_df[f'{col}_consistent_rate'] = pd.NA
col_df['entity_occurences'] = pd.NA
col_df = col_df.drop(columns=['table'])
return col_df
# determine how many times each entity occurs in col_df
occur = (
col_df.
groupby(by=cols_to_consit).
agg({'table': "count"}).
reset_index().
rename(columns={'table': 'entity_occurences'})
)
# add the occurances into the main dataframe
col_df = col_df.merge(occur, on=cols_to_consit)
# determine how many instances of each of the records in col exist
consist_df = (
col_df.
groupby(by=cols_to_consit + [col]).
agg({'table': 'count'}).
reset_index().
rename(columns={'table': 'record_occurences'})
)
# now in col_df we have # of times an entity occurred accross the tables
# and we are going to merge in the # of times each value occured for each
# entity record. When we merge the consistency in with the occurances, we
# can determine if the records are more than 70% consistent across the
# occurances of the entities.
col_df = col_df.merge(consist_df, how='outer').drop(columns=['table'])
# change all of the fully consistent records to True
col_df[f'{col}_consistent_rate'] = (
col_df['record_occurences'] / col_df['entity_occurences'])
col_df[f'{col}_consistent'] = (
col_df[f'{col}_consistent_rate'] > strictness)
col_df = col_df.sort_values(f'{col}_consistent_rate')
return col_df
def _lat_long(dirty_df, clean_df, entity_id_df, entity_id,
col, cols_to_consit, round_to=2):
"""Harvests more complete lat/long in special cases.
For all of the entities were there is not a consistent enough reported
record for latitude and longitude, this function reduces the precision of
the reported lat/long by rounding down the reported records in order to get
more complete set of consistent records.
Args:
dirty_df (pandas.DataFrame): a dataframe with entity records that have
inconsistently reported lat/long.
clean_df (pandas.DataFrame): a dataframe with entity records that have
consistently reported lat/long.
entity_id_df (pandas.DataFrame): a dataframe with a complete set of
possible entity ids
entity_id (list): a list of the id(s) for the entity. Ex: for a plant
entity, the entity_id is ['plant_id_eia']. For a generator entity,
the entity_id is ['plant_id_eia', 'generator_id'].
col (string): the column name of the column we are trying to harvest.
cols_to_consit (list): a list of the columns to determine consistency.
This either the [entity_id] or the [entity_id, 'report_date'],
depending on whether the entity is static or annual.
round_to (integer): This is the number of decimals places we want to
preserve while rounding down.
Returns:
pandas.DataFrame: a dataframe with all of the entity ids. some will
have harvested records from the clean_df. some will have harvested
records that were found after rounding. some will have NaNs if no
consistently reported records were found.
"""
# grab the dirty plant records, round and get a new consistency
ll_df = dirty_df.round(decimals={col: round_to})
logger.debug(f"Dirty {col} records: {len(ll_df)}")
ll_df['table'] = 'special_case'
ll_df = _occurrence_consistency(entity_id, ll_df, col, cols_to_consit)
# grab the clean plants
ll_clean_df = clean_df.dropna()
# find the new clean plant records by selecting the True consistent records
ll_df = ll_df[ll_df[f'{col}_consistent']].drop_duplicates(subset=entity_id)
logger.debug(f"Clean {col} records: {len(ll_df)}")
# add the newly cleaned records
ll_clean_df = ll_clean_df.append(ll_df,)
# merge onto the plants df w/ all plant ids
ll_clean_df = entity_id_df.merge(ll_clean_df, how='outer')
return ll_clean_df
def _add_timezone(plants_entity):
"""Adds plant IANA timezones from lat / lon.
Args:
plants_entity (pandas.DataFrame): Plant entity table, including columns
named "latitude", "longitude", and optionally "state"
Returns:
:class:`pandas.DataFrame`: A DataFrame containing the same table, with a
"timezone" column added. Timezone may be missing if lat / lon is
missing or invalid.
"""
plants_entity["timezone"] = plants_entity.apply(
lambda row: pudl.helpers.find_timezone(
lng=row["longitude"], lat=row["latitude"],
state=row["state"], strict=False
),
axis=1,
)
return plants_entity
def _add_additional_epacems_plants(plants_entity):
"""Adds the info for plants that have IDs in the CEMS data but not EIA data.
The columns loaded are plant_id_eia, plant_name, state, latitude, and
longitude. Note that a side effect will be resetting the index on
plants_entity, if onecexists. If that's a problem, modify the code below.
Note that some of these plants disappear from the CEMS before the
earliest EIA data PUDL processes, so if PUDL eventually ingests older
data, these may be redundant.
The set of additional plants is every plant that appears in the hourly CEMS
data (1995-2017) that never appears in the EIA 923 or 860 data (2009-2017
for EIA 923, 2011-2017 for EIA 860).
Args:
plants_entity (pandas.DataFrame) The plant entity table that will be
appended to
Returns:
pandas.DataFrame: The same plants_entity table, with the addition of
some missing EPA CEMS plants.
"""
# Add the plant IDs that are missing and update the values for the others
# The data we're reading is a CSV in pudl/metadata/
# SQL would call this whole process an upsert
# See also: https://github.com/pandas-dev/pandas/issues/22812
cems_df = pd.read_csv(
importlib.resources.open_text(
'pudl.package_data.epa.cems',
'plant_info_for_additional_cems_plants.csv'),
index_col=["plant_id_eia"],
usecols=["plant_id_eia", "plant_name_eia",
"state", "latitude", "longitude"],
)
plants_entity = plants_entity.set_index("plant_id_eia")
cems_unmatched = cems_df.loc[~cems_df.index.isin(plants_entity.index)]
# update will replace columns and index values that add rows or affect
# non-matching columns. It also requires an index, so we set and reset the
# index as necessary. Also, it only works in-place, so we can't chain.
plants_entity.update(cems_df, overwrite=True)
return plants_entity.append(cems_unmatched).reset_index()
def _compile_all_entity_records(entity, eia_transformed_dfs):
"""
Compile all of the entity records from each table they appear in.
Comb through each of the dataframes in the eia_transformed_dfs dictionary
to pull out ever instance of the entity id.
"""
# we know these columns must be in the dfs
entity_id = pc.entities[entity][0]
static_cols = pc.entities[entity][1]
annual_cols = pc.entities[entity][2]
base_cols = pc.entities[entity][0] + ['report_date']
# empty list for dfs to be added to for each table below
dfs = []
# for each df in the dict of transformed dfs
for table_name, transformed_df in eia_transformed_dfs.items():
# inside of main() we are going to be adding items into
# eia_transformed_dfs with the name 'annual'. We don't want to harvest
# from our newly harvested tables.
if 'annual' not in table_name:
# if the df contains the desired columns the grab those columns
if set(base_cols).issubset(transformed_df.columns):
logger.debug(f" {table_name}...")
# create a copy of the df to muck with
df = transformed_df.copy()
# we know these columns must be in the dfs
cols = []
# check whether the columns are in the specific table
for column in static_cols + annual_cols:
if column in df.columns:
cols.append(column)
df = df[(base_cols + cols)]
df = df.dropna(subset=entity_id)
# add a column with the table name so we know its origin
df['table'] = table_name
dfs.append(df)
# remove the static columns, with an exception
if ((entity in ('generators', 'plants'))
and (table_name in ('ownership_eia860',
'utilities_eia860',
'generators_eia860'))):
cols.remove('utility_id_eia')
transformed_df = transformed_df.drop(columns=cols)
eia_transformed_dfs[table_name] = transformed_df
# add those records to the compliation
compiled_df = pd.concat(dfs, axis=0, ignore_index=True, sort=True)
# strip the month and day from the date so we can have annual records
compiled_df['report_date'] = compiled_df['report_date'].dt.year
# convert the year back into a date_time object
year = compiled_df['report_date']
compiled_df['report_date'] = pd.to_datetime({'year': year,
'month': 1,
'day': 1})
logger.debug(' Casting harvested IDs to correct data types')
# most columns become objects (ack!), so assign types
compiled_df = compiled_df.astype(pc.entities[entity][3])
return compiled_df
def _manage_strictness(col, eia860_ytd):
"""
Manage the strictness level for each column.
Args:
col (str): name of column
eia860_ytd (boolean): if True, the etl run is attempting to include
year-to-date updated from EIA 860M.
"""
strictness_default = .7
# the longitude column is very different in the ytd 860M data (it appears
# to have an additional decimal point) bc it shows up in the generator
# table but it is a plant level data point, it mucks up the consistency
strictness_cols = {
'plant_name_eia': 0,
'utility_name_eia': 0,
'longitude': 0 if eia860_ytd else .7,
}
return strictness_cols.get(col, strictness_default)
[docs]def harvesting(entity, # noqa: C901
eia_transformed_dfs,
entities_dfs,
eia860_ytd=False,
debug=False):
"""Compiles consistent records for various entities.
For each entity(plants, generators, boilers, utilties), this function
finds all the harvestable columns from any table that they show up
in. It then determines how consistent the records are and keeps the values
that are mostly consistent. It compiles those consistent records into
one normalized table.
There are a few things to note here. First being that we are not expecting
the outcome here to be perfect! We choose to pull the most consistent
record as reported across all the EIA tables and years, but we also
required a "strictness" level of 70% (this is currently a hard coded
argument for _occurrence_consistency). That means at least 70% of the
records must be the same for us to use that value. So if values for an
entity haven't been reported 70% consistently, then it will show up as a
null value. We built in the ability to add special cases for columns where
we want to apply a different method to, but the only ones we added was for
latitude and longitude because they are by far the dirtiest.
We have determined which columns should be considered "static" or "annual".
These can be found in constants in the `entities` dictionary. Static means
That is should not change over time. Annual means there is annual
variablity. This distinction was made in part by testing the consistency
and in part by an understanding of how the entities and columns relate in
the real world.
Args:
entity (str): plants, generators, boilers, utilties
eia_transformed_dfs (dict): A dictionary of tbl names (keys) and
transformed dfs (values)
entities_dfs(dict): A dictionary of entity table names (keys) and
entity dfs (values)
eia860_ytd (boolean): if True, the etl run is attempting to include
year-to-date updated from EIA 860M.
debug (bool): If True, this function will also return an additional
dictionary of dataframes that includes the pre-deduplicated
compiled records with the number of occurances of the entity and
the record to see consistency of reported values.
Returns:
tuple: A tuple containing:
eia_transformed_dfs (dict): dictionary of tbl names (keys) and
transformed dfs (values)
entity_dfs (dict): dictionary of entity table names (keys) and
entity dfs (values)
Raises:
AssertionError: If the consistency of any record value is <90%.
Todo:
* Return to role of debug.
* Determine what to do with null records
* Determine how to treat mostly static records
"""
# we know these columns must be in the dfs
entity_id = pc.entities[entity][0]
static_cols = pc.entities[entity][1]
annual_cols = pc.entities[entity][2]
logger.debug(" compiling plants for entity tables from:")
compiled_df = _compile_all_entity_records(entity, eia_transformed_dfs)
# compile annual ids
annual_id_df = compiled_df[
['report_date'] + entity_id].copy().drop_duplicates()
annual_id_df.sort_values(['report_date'] + entity_id,
inplace=True, ascending=False)
# create the annual and entity dfs
entity_id_df = annual_id_df.drop(
['report_date'], axis=1).drop_duplicates(subset=entity_id)
entity_df = entity_id_df.copy()
annual_df = annual_id_df.copy()
special_case_cols = {'latitude': [_lat_long, 1],
'longitude': [_lat_long, 1]}
consistency = pd.DataFrame(columns=['column', 'consistent_ratio',
'wrongos', 'total'])
col_dfs = {}
# determine how many times each of the columns occur
for col in static_cols + annual_cols:
if col in annual_cols:
cols_to_consit = entity_id + ['report_date']
if col in static_cols:
cols_to_consit = entity_id
strictness = _manage_strictness(col, eia860_ytd)
col_df = _occurrence_consistency(
entity_id, compiled_df, col, cols_to_consit, strictness=strictness)
# pull the correct values out of the df and merge w/ the plant ids
col_correct_df = (
col_df[col_df[f'{col}_consistent']].
drop_duplicates(subset=(cols_to_consit + [f'{col}_consistent']))
)
# we need this to be an empty df w/ columns bc we are going to use it
if col_correct_df.empty:
col_correct_df = pd.DataFrame(columns=col_df.columns)
if col in static_cols:
clean_df = entity_id_df.merge(
col_correct_df, on=entity_id, how='left')
clean_df = clean_df[entity_id + [col]]
entity_df = entity_df.merge(clean_df, on=entity_id)
if col in annual_cols:
clean_df = annual_id_df.merge(
col_correct_df, on=(entity_id + ['report_date']), how='left')
clean_df = clean_df[entity_id + ['report_date', col]]
annual_df = annual_df.merge(
clean_df, on=(entity_id + ['report_date']))
# get the still dirty records by using the cleaned ids w/null values
# we need the plants that have no 'correct' value so
# we can't just use the col_df records when the consistency is not True
dirty_df = col_df.merge(
clean_df[clean_df[col].isnull()][entity_id])
if col in special_case_cols.keys():
clean_df = special_case_cols[col][0](
dirty_df, clean_df, entity_id_df, entity_id, col,
cols_to_consit, special_case_cols[col][1])
if debug:
col_dfs[col] = col_df
# this next section is used to print and test whether the harvested
# records are consistent enough
total = len(col_df.drop_duplicates(subset=cols_to_consit))
# if the total is 0, the ratio will error, so assign null values.
if total == 0:
ratio = np.NaN
wrongos = np.NaN
logger.debug(f" Zero records found for {col}")
if total > 0:
ratio = (
len(col_df[(col_df[f'{col}_consistent'])].
drop_duplicates(subset=cols_to_consit)) / total
)
wrongos = (1 - ratio) * total
logger.debug(
f" Ratio: {ratio:.3} "
f"Wrongos: {wrongos:.5} "
f"Total: {total} {col}"
)
if ratio < 0.9:
if debug:
logger.error(f'{col} has low consistency: {ratio:.3}.')
else:
raise AssertionError(
f'Harvesting of {col} is too inconsistent at {ratio:.3}.')
# add to a small df to be used in order to print out the ratio of
# consistent records
consistency = consistency.append({'column': col,
'consistent_ratio': ratio,
'wrongos': wrongos,
'total': total}, ignore_index=True)
mcs = consistency['consistent_ratio'].mean()
logger.info(
f"Average consistency of static {entity} values is {mcs:.2%}")
if entity == "plants":
entity_df = _add_additional_epacems_plants(entity_df)
entity_df = _add_timezone(entity_df)
eia_transformed_dfs[f'{entity}_annual_eia'] = annual_df
entities_dfs[f'{entity}_entity_eia'] = entity_df
if debug:
return entities_dfs, eia_transformed_dfs, col_dfs
return (entities_dfs, eia_transformed_dfs)
def _boiler_generator_assn(eia_transformed_dfs,
eia923_years=pc.working_partitions['eia923']['years'],
eia860_years=pc.working_partitions['eia860']['years'],
debug=False):
"""
Creates a set of more complete boiler generator associations.
Creates a unique unit_id_pudl for each collection of boilers and generators
within a plant that have ever been associated with each other, based on
the boiler generator associations reported in EIA860. Unfortunately, this
information is not complete for years before 2014, as the gas turbine
portion of combined cycle power plants in those earlier years were not
reporting their fuel consumption, or existence as part of the plants.
For years 2014 and on, EIA860 contains a unit_id_eia value, allowing the
combined cycle plant compoents to be associated with each other. For many
plants not listed in the reported boiler generator associations, it is
nonetheless possible to associate boilers and generators on a one-to-one
basis, as they use identical strings to describe the units.
In the end, between the reported BGA table, the string matching, and the
unit_id_eia values, it's possible to create a nearly complete mapping of
the generation units, at least for 2014 and later.
Args:
eia_transformed_dfs (dict): a dictionary of post-transform dataframes
representing the EIA database tables.
eia923_years (list-like): a list of the years of EIA 923 data that
should be used to infer the boiler-generator associations. By
default it is all the working years of data.
eia860_years (list-like): a list of the years of EIA 860 data that
should be used to infer the boiler-generator associations. By
default it is all the working years of data.
debug (bool): If True, include columns in the returned dataframe
indicating by what method the individual boiler generator
associations were inferred.
Returns:
eia_transformed_dfs (dict): Returns the same dictionary of dataframes
that was passed in, and adds a new dataframe to it representing
the boiler-generator associations as records containing
plant_id_eia, generator_id, boiler_id, and unit_id_pudl
Raises:
AssertionError: If the boiler - generator association graphs are not
bi-partite, meaning generators only connect to boilers, and boilers
only connect to generators.
AssertionError: If all the boilers do not end up with the same unit_id
each year.
AssertionError: If all the generators do not end up with the same
unit_id each year.
"""
# if you're not ingesting both 860 and 923, the bga is not compilable
if not (eia860_years and eia923_years):
return
# compile and scrub all the parts
logger.info("Inferring complete EIA boiler-generator associations.")
bga_eia860 = (eia_transformed_dfs['boiler_generator_assn_eia860'].copy().
pipe(_restrict_years, eia923_years, eia860_years).
astype({'generator_id': str,
'boiler_id': str}))
# grab the generation_eia923 table, group annually, generate a new tag
gen_eia923 = eia_transformed_dfs['generation_eia923'].copy()
gen_eia923 = gen_eia923.set_index(pd.DatetimeIndex(gen_eia923.report_date))
gen_eia923 = (_restrict_years(gen_eia923, eia923_years, eia860_years).
astype({'generator_id': str}).
groupby([pd.Grouper(freq='AS'), 'plant_id_eia', 'generator_id']).
agg({'net_generation_mwh': 'sum'}).
reset_index())
gen_eia923['missing_from_923'] = False
# compile all of the generators
gens_eia860 = eia_transformed_dfs['generators_eia860'].copy()
gens_eia860 = _restrict_years(gens_eia860, eia923_years, eia860_years)
gens_eia860['generator_id'] = gens_eia860.generator_id.astype(str)
gens = pd.merge(gen_eia923, gens_eia860,
on=['plant_id_eia', 'report_date', 'generator_id'],
how='outer')
gens = (gens[['plant_id_eia',
'report_date',
'generator_id',
'unit_id_eia',
'net_generation_mwh',
'missing_from_923']].
drop_duplicates().
astype({'generator_id': str}))
# create the beginning of a bga compilation w/ the generators as the
# background
bga_compiled_1 = pd.merge(gens, bga_eia860,
on=['plant_id_eia', 'generator_id',
'report_date'],
how='outer')
# Create a set of bga's that are linked, directly from bga8
bga_assn = bga_compiled_1[bga_compiled_1['boiler_id'].notnull()].copy()
bga_assn['bga_source'] = 'eia860_org'
# Create a set of bga's that were not linked directly through bga8
bga_unassn = bga_compiled_1[bga_compiled_1['boiler_id'].isnull()].copy()
bga_unassn = bga_unassn.drop(['boiler_id'], axis=1)
# Side note: there are only 6 generators that appear in bga8 that don't
# apear in gens9 or gens8 (must uncomment-out the og_tag creation above)
# bga_compiled_1[bga_compiled_1['og_tag'].isnull()]
bf_eia923 = eia_transformed_dfs['boiler_fuel_eia923'].copy()
bf_eia923 = _restrict_years(bf_eia923, eia923_years, eia860_years)
bf_eia923['boiler_id'] = bf_eia923.boiler_id.astype(str)
bf_eia923['total_heat_content_mmbtu'] = bf_eia923['fuel_consumed_units'] * \
bf_eia923['fuel_mmbtu_per_unit']
bf_eia923 = bf_eia923.set_index(pd.DatetimeIndex(bf_eia923.report_date))
bf_eia923_gb = bf_eia923.groupby(
[pd.Grouper(freq='AS'), 'plant_id_eia', 'boiler_id'])
bf_eia923 = bf_eia923_gb.agg({
'total_heat_content_mmbtu': pudl.helpers.sum_na,
}).reset_index()
bf_eia923.drop_duplicates(
subset=['plant_id_eia', 'report_date', 'boiler_id'], inplace=True)
# Create a list of boilers that were not in bga8
bf9_bga = bf_eia923.merge(bga_compiled_1,
on=['plant_id_eia', 'boiler_id', 'report_date'],
how='outer',
indicator=True)
bf9_not_in_bga = bf9_bga[bf9_bga['_merge'] == 'left_only']
bf9_not_in_bga = bf9_not_in_bga.drop(['_merge'], axis=1)
# Match the unassociated generators with unassociated boilers
# This method is assuming that some the strings of the generators and the
# boilers are the same
bga_unassn = bga_unassn.merge(bf9_not_in_bga[['plant_id_eia',
'boiler_id',
'report_date']],
how='left',
left_on=['report_date',
'plant_id_eia',
'generator_id'],
right_on=['report_date',
'plant_id_eia',
'boiler_id'])
bga_unassn.sort_values(['report_date', 'plant_id_eia'], inplace=True)
bga_unassn['bga_source'] = None
bga_unassn.loc[bga_unassn.boiler_id.notnull(),
'bga_source'] = 'string_assn'
bga_compiled_2 = (bga_assn.append(bga_unassn).
sort_values(['plant_id_eia', 'report_date']).
fillna({'missing_from_923': True}))
# Connect the gens and boilers in units
bga_compiled_units = bga_compiled_2.loc[
bga_compiled_2['unit_id_eia'].notnull()]
bga_gen_units = bga_compiled_units.drop(['boiler_id'], axis=1)
bga_boil_units = bga_compiled_units[['plant_id_eia',
'report_date',
'boiler_id',
'unit_id_eia']].copy()
bga_boil_units.dropna(subset=['boiler_id'], inplace=True)
# merge the units with the boilers
bga_unit_compilation = bga_gen_units.merge(bga_boil_units,
how='outer',
on=['plant_id_eia',
'report_date',
'unit_id_eia'],
indicator=True)
# label the bga_source
bga_unit_compilation. \
loc[bga_unit_compilation['bga_source'].isnull(),
'bga_source'] = 'unit_connection'
bga_unit_compilation.drop(['_merge'], axis=1, inplace=True)
bga_non_units = bga_compiled_2[bga_compiled_2['unit_id_eia'].isnull()]
# combine the unit compilation and the non units
bga_compiled_3 = bga_non_units.append(bga_unit_compilation)
# resort the records and the columns
bga_compiled_3.sort_values(['plant_id_eia', 'report_date'], inplace=True)
bga_compiled_3 = bga_compiled_3[['plant_id_eia',
'report_date',
'generator_id',
'boiler_id',
'unit_id_eia',
'bga_source',
'net_generation_mwh',
'missing_from_923']]
# label plants that have 'bad' generator records (generators that have MWhs
# in gens9 but don't have connected boilers) create a df with just the bad
# plants by searching for the 'bad' generators
bad_plants = bga_compiled_3[(bga_compiled_3['boiler_id'].isnull()) &
(bga_compiled_3['net_generation_mwh'] > 0)].\
drop_duplicates(subset=['plant_id_eia', 'report_date'])
bad_plants = bad_plants[['plant_id_eia', 'report_date']]
# merge the 'bad' plants back into the larger frame
bga_compiled_3 = bga_compiled_3.merge(bad_plants,
how='outer',
on=['plant_id_eia', 'report_date'],
indicator=True)
# use the indicator to create labels
bga_compiled_3['plant_w_bad_generator'] = np.where(
bga_compiled_3._merge == 'both', True, False)
# Note: At least one gen has reported MWh in 923, but could not be
# programmatically mapped to a boiler
# we don't need this one anymore
bga_compiled_3 = bga_compiled_3.drop(['_merge'], axis=1)
# create a label for generators that are unmapped but in 923
bga_compiled_3['unmapped_but_in_923'] = np.where((bga_compiled_3.boiler_id.isnull()) &
~bga_compiled_3.missing_from_923 &
(bga_compiled_3.net_generation_mwh == 0),
True,
False)
# create a label for generators that are unmapped
bga_compiled_3['unmapped'] = np.where(bga_compiled_3.boiler_id.isnull(),
True,
False)
bga_out = bga_compiled_3.drop('net_generation_mwh', axis=1)
bga_out.loc[bga_out.unit_id_eia.isnull(), 'unit_id_eia'] = None
bga_for_nx = bga_out[['plant_id_eia', 'report_date', 'generator_id',
'boiler_id', 'unit_id_eia']]
# If there's no boiler... there's no boiler-generator association
bga_for_nx = bga_for_nx.dropna(subset=['boiler_id']).drop_duplicates()
# Need boiler & generator specific ID strings, or they look like
# the same node to NX
bga_for_nx['generators'] = 'p' + bga_for_nx.plant_id_eia.astype(str) + \
'_g' + bga_for_nx.generator_id.astype(str)
bga_for_nx['boilers'] = 'p' + bga_for_nx.plant_id_eia.astype(str) + \
'_b' + bga_for_nx.boiler_id.astype(str)
# dataframe to accumulate the unit_ids in
bga_w_units = pd.DataFrame()
# We want to start our unit_id counter anew for each plant:
for pid in bga_for_nx.plant_id_eia.unique():
bga_byplant = bga_for_nx[bga_for_nx.plant_id_eia == pid].copy()
# Create a graph from the dataframe of boilers and generators. It's a
# multi-graph, meaning the same nodes can be connected by more than one
# edge -- this allows us to preserve multiple years worth of boiler
# generator association information for later inspection if need be:
bga_graph = nx.from_pandas_edgelist(bga_byplant,
source='generators',
target='boilers',
edge_attr=True,
create_using=nx.MultiGraph())
# Each connected sub-graph is a generation unit:
gen_units = [bga_graph.subgraph(c).copy()
for c in nx.connected_components(bga_graph)]
# Assign a unit_id to each subgraph, and extract edges into a dataframe
for unit_id, unit in zip(range(len(gen_units)), gen_units):
# All the boiler-generator association graphs should be bi-partite,
# meaning generators only connect to boilers, and boilers only
# connect to generators.
if not nx.algorithms.bipartite.is_bipartite(unit):
raise AssertionError(
f"Non-bipartite generation unit graph found."
f"plant_id_eia={pid}, unit_id_pudl={unit_id}."
)
nx.set_edge_attributes(
unit, name='unit_id_pudl', values=unit_id + 1)
new_unit_df = nx.to_pandas_edgelist(unit)
bga_w_units = bga_w_units.append(new_unit_df)
bga_w_units = bga_w_units.sort_values(['plant_id_eia', 'unit_id_pudl',
'generator_id', 'boiler_id'])
bga_w_units = bga_w_units.drop(['source', 'target'], axis=1)
# Check whether the PUDL unit_id values we've inferred conflict with
# the unit_id_eia values that were reported to EIA. Are there any PUDL
# unit_id values that have more than 1 EIA unit_id_eia within them?
bga_unit_id_eia_counts = bga_w_units.groupby(['plant_id_eia', 'unit_id_pudl'])['unit_id_eia'].\
nunique().to_frame().reset_index()
bga_unit_id_eia_counts = bga_unit_id_eia_counts.rename(
columns={'unit_id_eia': 'unit_id_eia_count'})
bga_unit_id_eia_counts = pd.merge(bga_w_units, bga_unit_id_eia_counts,
on=['plant_id_eia', 'unit_id_pudl'])
too_many_codes = bga_unit_id_eia_counts[bga_unit_id_eia_counts.unit_id_eia_count > 1]
too_many_codes = too_many_codes[~too_many_codes.unit_id_eia.isnull()].\
groupby(['plant_id_eia', 'unit_id_pudl'])['unit_id_eia'].unique()
for row in too_many_codes.iteritems():
logger.warning(f"Multiple EIA unit codes:"
f"plant_id_eia={row[0][0]}, "
f"unit_id_pudl={row[0][1]}, "
f"unit_id_eia={row[1]}")
bga_w_units = bga_w_units.drop('unit_id_eia', axis=1)
# These assertions test that all boilers and generators ended up in the
# same unit_id across all the years of reporting:
pgu_gb = bga_w_units.groupby(
['plant_id_eia', 'generator_id'])['unit_id_pudl']
if not (pgu_gb.nunique() == 1).all():
raise AssertionError("Inconsistent inter-annual BGA assignment!")
pbu_gb = bga_w_units.groupby(
['plant_id_eia', 'boiler_id'])['unit_id_pudl']
if not (pbu_gb.nunique() == 1).all():
raise AssertionError("Inconsistent inter-annual BGA assignment!")
bga_w_units = bga_w_units.drop('report_date', axis=1)
bga_w_units = bga_w_units[['plant_id_eia', 'unit_id_pudl',
'generator_id', 'boiler_id']].drop_duplicates()
bga_out = pd.merge(bga_out, bga_w_units, how='left',
on=['plant_id_eia', 'generator_id', 'boiler_id'])
bga_out['unit_id_pudl'] = (
bga_out['unit_id_pudl'].
fillna(value=0).
astype(int)
)
if not debug:
bga_out = bga_out[~bga_out.missing_from_923 &
~bga_out.plant_w_bad_generator &
~bga_out.unmapped_but_in_923 &
~bga_out.unmapped]
bga_out = bga_out.drop(['missing_from_923',
'plant_w_bad_generator',
'unmapped_but_in_923',
'unmapped'], axis=1)
bga_out = bga_out.drop_duplicates(subset=['report_date',
'plant_id_eia',
'boiler_id',
'generator_id'])
eia_transformed_dfs['boiler_generator_assn_eia860'] = bga_out
return eia_transformed_dfs
def _restrict_years(df,
eia923_years=pc.working_partitions['eia923']['years'],
eia860_years=pc.working_partitions['eia860']['years']):
"""Restricts eia years for boiler generator association."""
bga_years = set(eia860_years) & set(eia923_years)
df = df[df.report_date.dt.year.isin(bga_years)]
return df