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added meter carbon dioxide emission aggregation procedure

pull/119/head
13621160019@163.com 2022-01-25 22:40:57 +08:00
parent 0fb1cba06a
commit 912fd5b613
3 changed files with 354 additions and 0 deletions
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84
myems-aggregation/carbon_dioxide_emmision_factor.py Normal file
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@ -0,0 +1,84 @@
from datetime import timedelta
import mysql.connector
import config
import collections
########################################################################################################################
# Get carbon dioxide emission factor by energy category
########################################################################################################################
def get_energy_category_factor(energy_category_id, start_datetime_utc, end_datetime_utc):
# todo: verify parameters
# todo: add start_datetime_utc and end_datetime_utc to factor
# get timezone offset in minutes, this value will be returned to client
timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
if config.utc_offset[0] == '-':
timezone_offset = -timezone_offset
cnx = None
cursor = None
try:
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query_factors = (" SELECT kgco2e "
" FROM tbl_energy_categories "
" WHERE energy_category_id = %s ")
cursor.execute(query_factors, (energy_category_id,))
rows_factor = cursor.fetchone()
except Exception as e:
print(str(e))
return None
finally:
if cursor:
cursor.close()
if cnx:
cnx.disconnect()
if rows_factor is None:
if cursor:
cursor.close()
if cnx:
cnx.disconnect()
return None
else:
return rows_factor[0]
########################################################################################################################
# Get carbon dioxide emission factor by energy item
########################################################################################################################
def get_energy_item_tariffs(energy_item_id, start_datetime_utc, end_datetime_utc):
# todo: verify parameters
# todo: add start_datetime_utc and end_datetime_utc to factor
# get timezone offset in minutes, this value will be returned to client
timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
if config.utc_offset[0] == '-':
timezone_offset = -timezone_offset
cnx = None
cursor = None
try:
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query_factors = (" SELECT ec.kgco2e "
" FROM tbl_energy_categories ec, tbl_energy_items ei "
" WHERE ei.id = %s AND ei.energy_category_id = ec.id ")
cursor.execute(query_factors, (energy_item_id,))
rows_factor = cursor.fetchone()
except Exception as e:
print(str(e))
return None
finally:
if cursor:
cursor.close()
if cnx:
cnx.disconnect()
if rows_factor is None:
if cursor:
cursor.close()
if cnx:
cnx.disconnect()
return None
else:
return rows_factor[0]

3
myems-aggregation/main.py
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@ -19,6 +19,7 @@ import equipment_billing_input_category
import equipment_billing_input_item
import equipment_billing_output_category
import meter_carbon
import meter_billing
import offline_meter_billing
@ -97,6 +98,8 @@ def main():
# equipment energy output by energy categories
Process(target=equipment_energy_output_category.main, args=(logger,)).start()
# meter carbon
Process(target=meter_carbon.main, args=(logger,)).start()
# meter billing
Process(target=meter_billing.main, args=(logger,)).start()

267
myems-aggregation/meter_carbon.py Normal file
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@ -0,0 +1,267 @@
import time
from datetime import datetime, timedelta
from decimal import Decimal
import mysql.connector
import carbon_dioxide_emmision_factor
import config
########################################################################################################################
# PROCEDURES
# Step 1: get all meters
# for each meter in list:
# Step 2: get the latest start_datetime_utc
# Step 3: get all energy data since the latest start_datetime_utc
# Step 4: get carbon dioxide emission factor
# Step 5: calculate carbon dioxide emission by multiplying energy with factor
# Step 6: save carbon dioxide emission data to database
########################################################################################################################
def main(logger):
while True:
# the outermost while loop
################################################################################################################
# Step 1: get all meters
################################################################################################################
cnx_system_db = None
cursor_system_db = None
try:
cnx_system_db = mysql.connector.connect(**config.myems_system_db)
cursor_system_db = cnx_system_db.cursor()
except Exception as e:
logger.error("Error in step 1.1 of meter_carbon " + str(e))
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
# sleep and continue the outermost while loop
time.sleep(60)
continue
print("Connected to MyEMS System Database")
meter_list = list()
try:
cursor_system_db.execute(" SELECT id, name, energy_category_id, cost_center_id "
" FROM tbl_meters "
" ORDER BY id ")
rows_meters = cursor_system_db.fetchall()
if rows_meters is None or len(rows_meters) == 0:
print("Step 1.2: There isn't any meters. ")
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
# sleep and continue the outermost while loop
time.sleep(60)
continue
for row in rows_meters:
meter_list.append({"id": row[0],
"name": row[1],
"energy_category_id": row[2],
"cost_center_id": row[3]})
except Exception as e:
logger.error("Error in step 1.2 of meter_carbon " + str(e))
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
# sleep and continue the outermost while loop
time.sleep(60)
continue
print("Step 1.2: Got all meters from MyEMS System Database")
cnx_energy_db = None
cursor_energy_db = None
try:
cnx_energy_db = mysql.connector.connect(**config.myems_energy_db)
cursor_energy_db = cnx_energy_db.cursor()
except Exception as e:
logger.error("Error in step 1.3 of meter_carbon " + str(e))
if cursor_energy_db:
cursor_energy_db.close()
if cnx_energy_db:
cnx_energy_db.close()
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
# sleep and continue the outermost while loop
time.sleep(60)
continue
print("Connected to MyEMS Energy Database")
cnx_carbon_db = None
cursor_carbon_db = None
try:
cnx_carbon_db = mysql.connector.connect(**config.myems_carbon_db)
cursor_carbon_db = cnx_carbon_db.cursor()
except Exception as e:
logger.error("Error in step 1.4 of meter_carbon " + str(e))
if cursor_carbon_db:
cursor_carbon_db.close()
if cnx_carbon_db:
cnx_carbon_db.close()
if cursor_energy_db:
cursor_energy_db.close()
if cnx_energy_db:
cnx_energy_db.close()
if cursor_system_db:
cursor_system_db.close()
if cnx_system_db:
cnx_system_db.close()
# sleep and continue the outermost while loop
time.sleep(60)
continue
print("Connected to MyEMS Carbon Database")
for meter in meter_list:
############################################################################################################
# Step 2: get the latest start_datetime_utc
############################################################################################################
print("Step 2: get the latest start_datetime_utc from carbon database for " + meter['name'])
try:
cursor_carbon_db.execute(" SELECT MAX(start_datetime_utc) "
" FROM tbl_meter_hourly "
" WHERE meter_id = %s ",
(meter['id'], ))
row_datetime = cursor_carbon_db.fetchone()
start_datetime_utc = datetime.strptime(config.start_datetime_utc, '%Y-%m-%d %H:%M:%S')
start_datetime_utc = start_datetime_utc.replace(minute=0, second=0, microsecond=0, tzinfo=None)
if row_datetime is not None and len(row_datetime) > 0 and isinstance(row_datetime[0], datetime):
# replace second and microsecond with 0
# note: do not replace minute in case of calculating in half hourly
start_datetime_utc = row_datetime[0].replace(second=0, microsecond=0, tzinfo=None)
# start from the next time slot
start_datetime_utc += timedelta(minutes=config.minutes_to_count)
print("start_datetime_utc: " + start_datetime_utc.isoformat()[0:19])
except Exception as e:
logger.error("Error in step 2 of meter_carbon " + str(e))
# break the for meter loop
break
############################################################################################################
# Step 3: get all energy data since the latest start_datetime_utc
############################################################################################################
print("Step 3: get all energy data since the latest start_datetime_utc")
query = (" SELECT start_datetime_utc, actual_value "
" FROM tbl_meter_hourly "
" WHERE meter_id = %s AND start_datetime_utc >= %s "
" ORDER BY id ")
cursor_energy_db.execute(query, (meter['id'], start_datetime_utc, ))
rows_hourly = cursor_energy_db.fetchall()
if rows_hourly is None or len(rows_hourly) == 0:
print("Step 3: There isn't any energy input data to calculate. ")
# continue the for meter loop
continue
energy_dict = dict()
energy_category_list = list()
energy_category_list.append(meter['energy_category_id'])
end_datetime_utc = start_datetime_utc
for row_hourly in rows_hourly:
current_datetime_utc = row_hourly[0]
actual_value = row_hourly[1]
if energy_dict.get(current_datetime_utc) is None:
energy_dict[current_datetime_utc] = dict()
energy_dict[current_datetime_utc][meter['energy_category_id']] = actual_value
if current_datetime_utc > end_datetime_utc:
end_datetime_utc = current_datetime_utc
############################################################################################################
# Step 4: get carbon dioxide emission factor
############################################################################################################
print("Step 4: get carbon dioxide emission factor")
factor_dict = dict()
for energy_category_id in energy_category_list:
factor_dict[energy_category_id] = \
carbon_dioxide_emmision_factor.get_energy_category_factor(
energy_category_id,
start_datetime_utc,
end_datetime_utc)
############################################################################################################
# Step 5: calculate carbon dioxide emission by multiplying energy with factor
############################################################################################################
print("Step 5: calculate carbon dioxide emission by multiplying energy with factor")
carbon_dict = dict()
if len(energy_dict) > 0:
for current_datetime_utc in energy_dict.keys():
carbon_dict[current_datetime_utc] = dict()
for energy_category_id in energy_category_list:
current_factor = factor_dict[energy_category_id]
current_energy = energy_dict[current_datetime_utc].get(energy_category_id)
if current_factor is not None \
and isinstance(current_factor, Decimal) \
and current_energy is not None \
and isinstance(current_energy, Decimal):
carbon_dict[current_datetime_utc][energy_category_id] = \
current_energy * current_factor
if len(carbon_dict[current_datetime_utc]) == 0:
del carbon_dict[current_datetime_utc]
############################################################################################################
# Step 6: save carbon dioxide emission data to database
############################################################################################################
print("Step 6: save carbon dioxide emission data to database")
if len(carbon_dict) > 0:
try:
add_values = (" INSERT INTO tbl_meter_hourly "
" (meter_id, "
" start_datetime_utc, "
" actual_value) "
" VALUES ")
for current_datetime_utc in carbon_dict:
for energy_category_id in energy_category_list:
current_carbon = carbon_dict[current_datetime_utc].get(energy_category_id)
if current_carbon is not None and isinstance(current_carbon, Decimal):
add_values += " (" + str(meter['id']) + ","
add_values += "'" + current_datetime_utc.isoformat()[0:19] + "',"
add_values += str(carbon_dict[current_datetime_utc][energy_category_id]) + "), "
print("add_values:" + add_values)
# trim ", " at the end of string and then execute
cursor_carbon_db.execute(add_values[:-2])
cnx_carbon_db.commit()
except Exception as e:
logger.error("Error in step 6 of meter_carbon " + str(e))
# break the for meter loop
break
# end of for meter loop
if cnx_system_db:
cnx_system_db.close()
if cursor_system_db:
cursor_system_db.close()
if cnx_energy_db:
cnx_energy_db.close()
if cursor_energy_db:
cursor_energy_db.close()
if cnx_carbon_db:
cnx_carbon_db.close()
if cursor_carbon_db:
cursor_carbon_db.close()
print("go to sleep 300 seconds...")
time.sleep(300)
print("wake from sleep, and continue to work...")
# end of the outermost while loop