from oemof import outputlib
from oemof.solph import EnergySystem, Model, Bus, Sink, Source, Transformer, Flow
periods = 20
timeindex = pd.date_range(start='2020-01-01', periods=periods, freq='H')
x = np.arange(0, periods, 1)
demand_ts = 0.5 * np.cos(x) + 1
print(demand_ts)
es = EnergySystem(timeindex=timeindex)
el_bus = Bus(label='el_bus')
demand = Sink(
label='el_demand',
inputs={
el_bus: Flow(
nominal_value=10,
actual_value=demand_ts,
fixed=True
)
}
)
pp1 = Source(
label='powerplant_1',
outputs={
import os
import pandas as pd
from oemof.solph import (Bus, Sink, Source, Flow, Transformer, Model,
EnergySystem)
filename = os.path.join(os.path.dirname(__file__), 'input_data.csv')
data = pd.read_csv(filename, sep=",")
bcoal = Bus(label='coal', balanced=False)
bgas = Bus(label='gas', balanced=False)
boil = Bus(label='oil', balanced=False)
blig = Bus(label='lignite', balanced=False)
# electricity and heat
bel = Bus(label='b_el')
bth = Bus(label='b_th')
# an excess and a shortage variable can help to avoid infeasible problems
excess_el = Sink(label='excess_el', inputs={bel: Flow()})
# shortage_el = Source(label='shortage_el',
# outputs={bel: Flow(variable_costs=200)})
# sources
wind = Source(label='wind',
outputs={
bel:
Flow(actual_value=data['wind'],
nominal_value=66.3,
fixed=True)
})
import matplotlib.pyplot as plt
solver = "cbc"
# Create an energy system and optimize the dispatch at least costs.
# ####################### initialize and provide data #####################
datetimeindex = pd.date_range("1/1/2016", periods=24 * 10, freq="H")
energysystem = EnergySystem(timeindex=datetimeindex)
filename = os.path.join(os.getcwd(), "input_data.csv")
data = pd.read_csv(filename, sep=",")
# ######################### create energysystem components ################
# resource buses
bcoal = Bus(label="coal", balanced=False)
bgas = Bus(label="gas", balanced=False)
boil = Bus(label="oil", balanced=False)
blig = Bus(label="lignite", balanced=False)
# electricity and heat
bel = Bus(label="bel")
bth = Bus(label="bth")
energysystem.add(bcoal, bgas, boil, blig, bel, bth)
# an excess and a shortage variable can help to avoid infeasible problems
energysystem.add(Sink(label="excess_el", inputs={bel: Flow()}))
# shortage_el = Source(label='shortage_el',
# outputs={bel: Flow(variable_costs=200)})
def test_dispatch_fix_example(solver='cbc', periods=10):
"""Invest in a flow with a `fix` sequence containing values > 1."""
Node.registry = None
filename = os.path.join(os.path.dirname(__file__), 'input_data.csv')
data = pd.read_csv(filename, sep=",")
# ######################### create energysystem components ################
# electricity and heat
bel = Bus(label='b_el')
# an excess and a shortage variable can help to avoid infeasible problems
excess_el = Sink(label='excess_el', inputs={bel: Flow()})
# shortage_el = Source(label='shortage_el',
# outputs={bel: Flow(variable_costs=200)})
# sources
ep_pv = economics.annuity(capex=1500, n=20, wacc=0.05)
pv = Source(label='pv',
outputs={
bel:
Flow(fix=data['pv'], investment=Investment(ep_costs=ep_pv))
})
# demands (electricity/heat)
demand_el = Sink(
label='demand_elec',
inputs={bel: Flow(nominal_value=85, fix=data['demand_el'])})
datetimeindex = pd.date_range('1/1/2012', periods=periods, freq='H')
energysystem = EnergySystem(timeindex=datetimeindex)
energysystem.add(bel, excess_el, pv, demand_el)
# ################################ optimization ###########################
# create optimization model based on energy_system
optimization_model = Model(energysystem=energysystem)
# solve problem
optimization_model.solve(solver=solver)
# ################################ results ################################
# generic result object
results = processing.results(om=optimization_model)
# subset of results that includes all flows into and from electrical bus
# sequences are stored within a pandas.DataFrames and scalars e.g.
# investment values within a pandas.Series object.
# in this case the entry data['scalars'] does not exist since no investment
# variables are used
data = views.node(results, 'b_el')
# generate results to be evaluated in tests
comp_results = data['sequences'].sum(axis=0).to_dict()
comp_results['pv_capacity'] = results[(pv, bel)]['scalars'].invest
assert comp_results[(('pv', 'b_el'), 'flow')] > 0
def test_add_constraints_example(solver='cbc', nologg=False):
if not nologg:
logging.basicConfig(level=logging.INFO)
# ##### creating an oemof solph optimization model, nothing special here ##
# create an energy system object for the oemof solph nodes
es = EnergySystem(timeindex=pd.date_range('1/1/2012', periods=4, freq='H'))
Node.registry = es
# add some nodes
boil = Bus(label="oil", balanced=False)
blig = Bus(label="lignite", balanced=False)
b_el = Bus(label="b_el")
Sink(label="Sink",
inputs={
b_el:
Flow(nominal_value=40,
actual_value=[0.5, 0.4, 0.3, 1],
fixed=True)
})
pp_oil = Transformer(
label='pp_oil',
inputs={boil: Flow()},
outputs={b_el: Flow(nominal_value=50, variable_costs=25)},
conversion_factors={b_el: 0.39})
Transformer(label='pp_lig',
inputs={blig: Flow()},
outputs={b_el: Flow(nominal_value=50, variable_costs=10)},
conversion_factors={b_el: 0.41})
# create the model
om = Model(energysystem=es)
# add specific emission values to flow objects if source is a commodity bus
for s, t in om.flows.keys():
if s is boil:
om.flows[s, t].emission_factor = 0.27 # t/MWh
if s is blig:
om.flows[s, t].emission_factor = 0.39 # t/MWh
emission_limit = 60e3
# add the outflow share
om.flows[(boil, pp_oil)].outflow_share = [1, 0.5, 0, 0.3]
# Now we are going to add a 'sub-model' and add a user specific constraint
# first we add ad pyomo Block() instance that we can use to add our
# constraints. Then, we add this Block to our previous defined
# Model instance and add the constraints.
myblock = po.Block()
# create a pyomo set with the flows (i.e. list of tuples),
# there will of course be only one flow inside this set, the one we used to
# add outflow_share
myblock.MYFLOWS = po.Set(initialize=[
k for (k, v) in om.flows.items() if hasattr(v, 'outflow_share')
])
# pyomo does not need a po.Set, we can use a simple list as well
myblock.COMMODITYFLOWS = [
k for (k, v) in om.flows.items() if hasattr(v, 'emission_factor')
]
# add the sub-model to the oemof Model instance
om.add_component('MyBlock', myblock)
def _inflow_share_rule(m, s, e, t):
"""pyomo rule definition: Here we can use all objects from the block or
the om object, in this case we don't need anything from the block
except the newly defined set MYFLOWS.
"""
expr = (om.flow[s, e, t] >= om.flows[s, e].outflow_share[t] *
sum(om.flow[i, o, t] for (i, o) in om.FLOWS if o == e))
return expr
myblock.inflow_share = po.Constraint(myblock.MYFLOWS,
om.TIMESTEPS,
rule=_inflow_share_rule)
# add emission constraint
myblock.emission_constr = po.Constraint(
expr=(sum(om.flow[i, o, t] for (i, o) in myblock.COMMODITYFLOWS
for t in om.TIMESTEPS) <= emission_limit))
# solve and write results to dictionary
# you may print the model with om.pprint()
ok_(om.solve(solver=solver))
logging.info("Successfully finished.")
'var': 30
},
'pp_bio': {
'epc': economics.annuity(capex=1000, n=10, wacc=0.05),
'var': 50
},
'storage': {
'epc': economics.annuity(capex=1500, n=10, wacc=0.05),
'var': 0
}
}
#################################################################
# Create oemof object
#################################################################
bel = Bus(label='micro_grid')
Sink(label='excess', inputs={bel: Flow(variable_costs=10e3)})
Source(label='pp_wind',
outputs={
bel:
Flow(nominal_value=None,
fixed=True,
actual_value=timeseries['wind'],
investment=Investment(ep_costs=costs['pp_wind']['epc']))
})
Source(label='pp_pv',
outputs={
bel:
# add edge labels for all edges
if edge_labels is True and plt:
labels = nx.get_edge_attributes(grph, 'weight')
nx.draw_networkx_edge_labels(grph, pos=pos, edge_labels=labels)
# show output
if plot is True:
plt.show()
datetimeindex = pd.date_range('1/1/2017', periods=2, freq='H')
es = EnergySystem(timeindex=datetimeindex)
b_0 = Bus(label='b_0')
b_1 = Bus(label='b_1')
es.add(b_0, b_1)
es.add(custom.Link(label="line_0",
inputs={
b_0: Flow(), b_1: Flow()},
outputs={
b_1: Flow(investment=Investment()),
b_0: Flow(investment=Investment())},
conversion_factors={
(b_0, b_1): 0.95, (b_1, b_0): 0.9}))
screen_level=logging.INFO,
file_level=logging.DEBUG)
# Creating the energy system
date_time_index = pd.date_range('1/1/2018', periods=24 * 365, freq='H')
es = EnergySystem(timeindex=date_time_index)
filename = 'data_timeseries.csv'
data = pd.read_csv(filename, sep=",")
logging.info('Energy system created and initialized')
# Creating the necessary buses
elbus = Bus(label='electricity')
logging.info('Necessary buses for the system created')
# Now creating the necessary components for the system
epc_pv = economics.annuity(capex=1000, n=20, wacc=0.05)
epc_storage = economics.annuity(capex=100, n=5, wacc=0.05)
pv = Source(label='pv',
outputs={
elbus:
Flow(actual_value=data['pv'],
nominal_value=None,
fixed=True,
investment=Investment(ep_costs=epc_pv, maximum=30))
print_parameters()
# Set up an energy system model
solver = 'cbc'
periods = 100
datetimeindex = pd.date_range('1/1/2019', periods=periods, freq='H')
demand_timeseries = np.zeros(periods)
demand_timeseries[-5:] = 1
heat_feedin_timeseries = np.zeros(periods)
heat_feedin_timeseries[:10] = 1
energysystem = EnergySystem(timeindex=datetimeindex)
bus_heat = Bus(label='bus_heat')
heat_source = Source(label='heat_source',
outputs={
bus_heat:
Flow(nominal_value=1,
actual_value=heat_feedin_timeseries,
fixed=True)
})
shortage = Source(label='shortage',
outputs={bus_heat: Flow(variable_costs=1e6)})
excess = Sink(label='excess', inputs={bus_heat: Flow()})
heat_demand = Sink(label='heat_demand',
def test_dispatch_example(solver='cbc', periods=24 * 5):
"""Create an energy system and optimize the dispatch at least costs."""
filename = os.path.join(os.path.dirname(__file__), 'input_data.csv')
data = pd.read_csv(filename, sep=",")
# ######################### create energysystem components ################
# resource buses
bcoal = Bus(label='coal', balanced=False)
bgas = Bus(label='gas', balanced=False)
boil = Bus(label='oil', balanced=False)
blig = Bus(label='lignite', balanced=False)
# electricity and heat
bel = Bus(label='b_el')
bth = Bus(label='b_th')
# an excess and a shortage variable can help to avoid infeasible problems
excess_el = Sink(label='excess_el', inputs={bel: Flow()})
# shortage_el = Source(label='shortage_el',
# outputs={bel: Flow(variable_costs=200)})
# sources
wind = Source(label='wind',
outputs={
bel:
Flow(actual_value=data['wind'],
nominal_value=66.3,
fixed=True)
})
pv = Source(label='pv',
outputs={
bel:
Flow(actual_value=data['pv'],
nominal_value=65.3,
fixed=True)
})
# demands (electricity/heat)
demand_el = Sink(label='demand_elec',
inputs={
bel:
Flow(nominal_value=85,
actual_value=data['demand_el'],
fixed=True)
})
demand_th = Sink(label='demand_therm',
inputs={
bth:
Flow(nominal_value=40,
actual_value=data['demand_th'],
fixed=True)
})
# power plants
pp_coal = Transformer(
label='pp_coal',
inputs={bcoal: Flow()},
outputs={bel: Flow(nominal_value=20.2, variable_costs=25)},
conversion_factors={bel: 0.39})
pp_lig = Transformer(
label='pp_lig',
inputs={blig: Flow()},
outputs={bel: Flow(nominal_value=11.8, variable_costs=19)},
conversion_factors={bel: 0.41})
pp_gas = Transformer(
label='pp_gas',
inputs={bgas: Flow()},
outputs={bel: Flow(nominal_value=41, variable_costs=40)},
conversion_factors={bel: 0.50})
pp_oil = Transformer(
label='pp_oil',
inputs={boil: Flow()},
outputs={bel: Flow(nominal_value=5, variable_costs=50)},
conversion_factors={bel: 0.28})
# combined heat and power plant (chp)
pp_chp = Transformer(label='pp_chp',
inputs={bgas: Flow()},
outputs={
bel: Flow(nominal_value=30, variable_costs=42),
bth: Flow(nominal_value=40)
},
conversion_factors={
bel: 0.3,
bth: 0.4
})
# heatpump with a coefficient of performance (COP) of 3
b_heat_source = Bus(label='b_heat_source')
heat_source = Source(label='heat_source', outputs={b_heat_source: Flow()})
cop = 3
heat_pump = Transformer(label='heat_pump',
inputs={
bel: Flow(),
b_heat_source: Flow()
},
outputs={bth: Flow(nominal_value=10)},
conversion_factors={
bel: 1 / 3,
b_heat_source: (cop - 1) / cop
})
datetimeindex = pd.date_range('1/1/2012', periods=periods, freq='H')
energysystem = EnergySystem(timeindex=datetimeindex)
energysystem.add(bcoal, bgas, boil, bel, bth, blig, excess_el, wind, pv,
demand_el, demand_th, pp_coal, pp_lig, pp_oil, pp_gas,
pp_chp, b_heat_source, heat_source, heat_pump)
# ################################ optimization ###########################
# create optimization model based on energy_system
optimization_model = Model(energysystem=energysystem)
# solve problem
optimization_model.solve(solver=solver)
# write back results from optimization object to energysystem
optimization_model.results()
# ################################ results ################################
# generic result object
results = processing.results(om=optimization_model)
# subset of results that includes all flows into and from electrical bus
# sequences are stored within a pandas.DataFrames and scalars e.g.
# investment values within a pandas.Series object.
# in this case the entry data['scalars'] does not exist since no investment
# variables are used
data = views.node(results, 'b_el')
# generate results to be evaluated in tests
results = data['sequences'].sum(axis=0).to_dict()
test_results = {
(('wind', 'b_el'), 'flow'): 1773,
(('pv', 'b_el'), 'flow'): 605,
(('b_el', 'demand_elec'), 'flow'): 7440,
(('b_el', 'excess_el'), 'flow'): 139,
(('pp_chp', 'b_el'), 'flow'): 666,
(('pp_lig', 'b_el'), 'flow'): 1210,
(('pp_gas', 'b_el'), 'flow'): 1519,
(('pp_coal', 'b_el'), 'flow'): 1925,
(('pp_oil', 'b_el'), 'flow'): 0,
(('b_el', 'heat_pump'), 'flow'): 118,
}
for key in test_results.keys():
eq_(int(round(results[key])), int(round(test_results[key])))
def test_gen_caes():
# read sequence data
full_filename = os.path.join(os.path.dirname(__file__), 'generic_caes.csv')
data = pd.read_csv(full_filename)
# select periods
periods = len(data)-1
# create an energy system
idx = pd.date_range('1/1/2017', periods=periods, freq='H')
es = EnergySystem(timeindex=idx)
Node.registry = es
# resources
bgas = Bus(label='bgas')
Source(label='rgas', outputs={
bgas: Flow(variable_costs=20)})
# power
bel_source = Bus(label='bel_source')
Source(label='source_el', outputs={
bel_source: Flow(variable_costs=data['price_el_source'])})
bel_sink = Bus(label='bel_sink')
Sink(label='sink_el', inputs={
bel_sink: Flow(variable_costs=data['price_el_sink'])})
# dictionary with parameters for a specific CAES plant
# based on thermal modelling and linearization techniques
concept = {
'cav_e_in_b': 0,
'cav_e_in_m': 0.6457267578,
'cav_e_out_b': 0,
'cav_e_out_m': 0.3739636077,
'cav_eta_temp': 1.0,
'cav_level_max': 211.11,
'cmp_p_max_b': 86.0918959849,
'cmp_p_max_m': 0.0679999932,
'cmp_p_min': 1,
'cmp_q_out_b': -19.3996965679,
'cmp_q_out_m': 1.1066036114,
'cmp_q_tes_share': 0,
'exp_p_max_b': 46.1294016678,
'exp_p_max_m': 0.2528340303,
'exp_p_min': 1,
'exp_q_in_b': -2.2073411014,
'exp_q_in_m': 1.129249765,
'exp_q_tes_share': 0,
'tes_eta_temp': 1.0,
'tes_level_max': 0.0
}
# generic compressed air energy storage (caes) plant
custom.GenericCAES(
label='caes',
electrical_input={bel_source: Flow()},
fuel_input={bgas: Flow()},
electrical_output={bel_sink: Flow()},
params=concept, fixed_costs=0)
# create an optimization problem and solve it
om = Model(es)
# solve model
om.solve(solver='cbc')
# create result object
results = processing.results(om)
data = views.node(
results, 'caes', keep_none_type=True
)['sequences'].sum(axis=0).to_dict()
test_dict = {
(('caes', None), 'cav_level'): 25658.82964382,
(('caes', None), 'exp_p'): 5020.801997000007,
(('caes', None), 'exp_q_fuel_in'): 5170.880360999999,
(('caes', None), 'tes_e_out'): 0.0,
(('caes', None), 'exp_st'): 226.0,
(('bgas', 'caes'), 'flow'): 5170.880360999999,
(('caes', None), 'cav_e_out'): 1877.5972265299995,
(('caes', None), 'exp_p_max'): 17512.352336,
(('caes', None), 'cmp_q_waste'): 2499.9125993000007,
(('caes', None), 'cmp_p'): 2907.7271520000004,
(('caes', None), 'exp_q_add_in'): 0.0,
(('caes', None), 'cmp_st'): 37.0,
(('caes', None), 'cmp_q_out_sum'): 2499.9125993000007,
(('caes', None), 'tes_level'): 0.0,
(('caes', None), 'tes_e_in'): 0.0,
(('caes', None), 'exp_q_in_sum'): 5170.880360999999,
(('caes', None), 'cmp_p_max'): 22320.76334300001,
(('caes', 'bel_sink'), 'flow'): 5020.801997000007,
(('bel_source', 'caes'), 'flow'): 2907.7271520000004,
(('caes', None), 'cav_e_in'): 1877.597226}
for key in test_dict.keys():
eq_(int(round(data[key])), int(round(test_dict[key])))
import oemof.outputlib as outputlib
import oemof.solph as solph
import numpy as np
import matplotlib.pyplot as plt
solver = 'cbc'
# set timeindex and create data
periods = 20
datetimeindex = pd.date_range('1/1/2019', periods=periods, freq='H')
step = 5
demand = np.arange(0, step * periods, step)
# set up EnergySystem
energysystem = EnergySystem(timeindex=datetimeindex)
b_gas = Bus(label='gas', balanced=False)
b_el = Bus(label='electricity')
energysystem.add(b_gas, b_el)
energysystem.add(
Sink(label='demand',
inputs={b_el: Flow(nominal_value=1, actual_value=demand,
fixed=True)}))
conv_func = lambda x: 0.01 * x**2
in_breakpoints = np.arange(0, 110, 25)
pwltf = solph.custom.PiecewiseLinearTransformer(
label='pwltf',
inputs={b_gas: solph.Flow(nominal_value=100, variable_costs=1)},
outputs={b_el: solph.Flow()},
in_breakpoints=in_breakpoints,
def create_optimization_model(mode,
feedin,
initial_batt_cap,
cost,
cap_pv,
cap_batt,
iterstatus=None,
PV_source=True,
storage_source=True,
logger=False):
if logger == 1:
logger.define_logging()
##################################### Initialize the energy system##################################################
# times = pd.DatetimeIndex(start='04/01/2017', periods=10, freq='H')
times = feedin.index
energysystem = EnergySystem(timeindex=times)
# switch on automatic registration of entities of EnergySystem-object=energysystem
Node.registry = energysystem
# add components
b_el = Bus(label='electricity')
b_dc = Bus(label='electricity_dc')
b_oil = Bus(label='diesel_source')
demand_feedin = feedin['demand_el']
Sink(label='demand',
inputs={
b_el: Flow(actual_value=demand_feedin,
nominal_value=1,
fixed=True)
})
Sink(label='excess', inputs={b_el: Flow()})
Source(label='diesel', outputs={b_oil: Flow()})
generator1 = custom.DieselGenerator(
label='pp_oil_1',
fuel_input={b_oil: Flow(variable_costs=cost['pp_oil_1']['var'])},
electrical_output={
b_el:
Flow(nominal_value=186,
min=0.3,
max=1,
nonconvex=NonConvex(om_costs=cost['pp_oil_1']['o&m']),
fixed_costs=cost['pp_oil_1']['fix'])
},
fuel_curve={
'1': 42,
'0.75': 33,
'0.5': 22,
'0.25': 16
})
generator2 = custom.DieselGenerator(
label='pp_oil_2',
fuel_input={b_oil: Flow(variable_costs=cost['pp_oil_2']['var'])},
electrical_output={
b_el:
Flow(nominal_value=186,
min=0.3,
max=1,
nonconvex=NonConvex(om_costs=cost['pp_oil_2']['o&m']),
fixed_costs=cost['pp_oil_2']['fix'],
variable_costs=0)
},
fuel_curve={
'1': 42,
'0.75': 33,
'0.5': 22,
'0.25': 16
})
generator3 = custom.DieselGenerator(
label='pp_oil_3',
fuel_input={b_oil: Flow(variable_costs=cost['pp_oil_3']['var'])},
electrical_output={
b_el:
Flow(nominal_value=320,
min=0.3,
max=1,
nonconvex=NonConvex(om_costs=cost['pp_oil_3']['o&m']),
fixed_costs=cost['pp_oil_3']['fix'],
variable_costs=0)
},
fuel_curve={
'1': 73,
'0.75': 57,
'0.5': 38,
'0.25': 27
})
# List all generators in a list called gen_set
gen_set = [generator1, generator2, generator3]
if PV_source == 1:
PV = Source(label='PV',
outputs={
b_dc:
Flow(nominal_value=cap_pv,
fixed_costs=cost['pv']['fix'] + cost['pv']['epc'],
actual_value=feedin['PV'],
fixed=True)
})
else:
PV = None
if storage_source == 1:
storage = components.GenericStorage(
label='storage',
inputs={b_dc: Flow()},
outputs={
b_dc:
Flow(variable_costs=cost['storage']['var'],
fixed_costs=cost['storage']['fix'])
},
nominal_capacity=cap_batt,
fixed_costs=cost['storage']['epc'],
capacity_loss=0.00,
initial_capacity=initial_batt_cap,
nominal_input_capacity_ratio=0.546,
nominal_output_capacity_ratio=0.546,
inflow_conversion_factor=0.92,
outflow_conversion_factor=0.92,
capacity_min=0.5,
capacity_max=1,
initial_iteration=iterstatus)
else:
storage = None
if storage_source == 1 or PV_source == 1:
inverter1 = add_inverter(b_dc, b_el, 'Inv_pv')
################################# optimization ############################
# create Optimization model based on energy_system
logging.info("Create optimization problem")
m = Model(energysystem)
################################# constraints ############################
sr_requirement = 0.2
sr_limit = demand_feedin * sr_requirement
rm_requirement = 0.4
rm_limit = demand_feedin * rm_requirement
constraints.spinning_reserve_constraint(m,
sr_limit,
groups=gen_set,
storage=storage)
# constraints.n1_constraint(m, demand_feedin, groups=gen_set)
constraints.gen_order_constraint(m, groups=gen_set)
constraints.rotating_mass_constraint(m,
rm_limit,
groups=gen_set,
storage=storage)
return [m, gen_set]
def create_energysystem_model(mode, feedin, initial_batt_cap, cost, iterstatus=None, PV_source=True,
storage_source=True):
"""
The function stes up the energy system model and resturns the operational model m, which equals the
MILP formulation
:param cost: mode optimization mode ['simulation','investment' ] as str
feed timeseries holding pv and demand_el values pd.DataFrame
initial_batt_cap initial SOC of the battery takes float values from 0-1
cost cost dict derived from get_cost_dict() dict
iterstatus None (only important for RH) boolean
PV_source include PV source 'True', exclude 'False' boolean
storage_source include BSS source 'True', exclude 'False' boolean
:return: m operational model oemof.solph.model
gen_set list of oemof.solph.custom.EngineGenerator objects integrated in the model
"""
##################################### Initialize the energy system##################################################
# initialize time steps
# times = pd.DatetimeIndex(start='04/01/2017', periods=10, freq='H')
times = feedin.index
# initialize energy system object
energysystem = EnergySystem( timeindex=times )
# switch on automatic registration of entities of EnergySystem-object=energysystem
Node.registry = energysystem
# add components
b_el = Bus( label='electricity' )
b_dc = Bus( label='electricity_dc' )
b_oil = Bus( label='diesel_source' )
demand_feedin = feedin['demand_el']
Sink( label='demand',
inputs={b_el: Flow( actual_value=demand_feedin,
nominal_value=1,
fixed=True )} )
Sink( label='excess',
inputs={b_el: Flow()} )
# add source in case of capacity shortages, to still find a feasible solution to the problem
# Source(label='shortage_el',
# outputs={b_el: Flow(variable_costs=1000)})
Source( label='diesel',
outputs={b_oil: Flow()} )
generator1 = custom.EngineGenerator( label='pp_oil_1',
fuel_input={b_oil: Flow( variable_costs=cost['pp_oil_1']['var'] )},
electrical_output={b_el: Flow( nominal_value=186,
min=0.3,
max=1,
nonconvex=NonConvex(
om_costs=cost['pp_oil_1']['o&m'] ),
fixed_costs=cost['pp_oil_1']['fix']
)},
fuel_curve={'1': 42, '0.75': 33, '0.5': 22, '0.25': 16} )
generator2 = custom.EngineGenerator( label='pp_oil_2',
fuel_input={b_oil: Flow( variable_costs=cost['pp_oil_2']['var'] )},
electrical_output={b_el: Flow( nominal_value=186,
min=0.3,
max=1,
nonconvex=NonConvex(
om_costs=cost['pp_oil_2']['o&m'] ),
fixed_costs=cost['pp_oil_2']['fix'],
variable_costs=0 )},
fuel_curve={'1': 42, '0.75': 33, '0.5': 22, '0.25': 16} )
generator3 = custom.EngineGenerator( label='pp_oil_3',
fuel_input={b_oil: Flow( variable_costs=cost['pp_oil_3']['var'] )},
electrical_output={b_el: Flow( nominal_value=320,
min=0.3,
max=1,
nonconvex=NonConvex(
om_costs=cost['pp_oil_3']['o&m'] ),
fixed_costs=cost['pp_oil_3']['fix'],
variable_costs=0 )},
fuel_curve={'1': 73, '0.75': 57, '0.5': 38, '0.25': 27} )
# List all generators in a list called gen_set
gen_set = [generator1, generator2, generator3]
sim_params = get_sim_params( cost )
if mode == 'simulation':
nominal_cap_pv = sim_params['pv']['nominal_capacity']
inv_pv = None
nominal_cap_batt = sim_params['storage']['nominal_capacity']
inv_batt = None
elif mode == 'investment':
nominal_cap_pv = None
inv_pv = sim_params['pv']['investment']
nominal_cap_batt = None
inv_batt = sim_params['storage']['investment']
else:
raise (UserWarning, 'Energysystem cant be build. Check if mode is spelled correctely. '
'It can be either [simulation] or [investment]')
if PV_source == 1:
PV = Source( label='PV',
outputs={b_dc: Flow( nominal_value=nominal_cap_pv,
fixed_costs=cost['pv']['fix'],
actual_value=feedin['PV'],
fixed=True,
investment=inv_pv )} )
else:
PV = None
if storage_source == 1:
storage = components.GenericStorage( label='storage',
inputs={b_dc: Flow()},
outputs={b_dc: Flow( variable_costs=cost['storage']['var'] )},
fixed_costs=cost['storage']['fix'],
nominal_capacity=nominal_cap_batt,
capacity_loss=0.00,
initial_capacity=initial_batt_cap,
nominal_input_capacity_ratio=0.546,
nominal_output_capacity_ratio=0.546,
inflow_conversion_factor=0.92,
outflow_conversion_factor=0.92,
capacity_min=0.5,
capacity_max=1,
investment=inv_batt,
initial_iteration=iterstatus )
else:
storage = None
if storage_source == 1 or PV_source == 1:
inverter1 = add_inverter( b_dc, b_el, 'Inv_pv' )
################################# optimization ############################
# create Optimization model based on energy_system
logging.info( "Create optimization problem" )
m = Model( energysystem )
################################# constraints ############################
# add constraints to the model
#spinning reserve constraint
sr_requirement = 0.2
sr_limit = demand_feedin * sr_requirement
#rotating mass constraint
rm_requirement = 0.4
rm_limit = demand_feedin * rm_requirement
constraints.spinning_reserve_constraint( m, sr_limit, groups=gen_set, storage=storage )
#(N-1) is turned of for Lifuka case study
# constraints.n1_constraint(m, demand_feedin, groups=gen_set)
#generator order constraint
constraints.gen_order_constraint( m, groups=gen_set )
constraints.rotating_mass_constraint( m, rm_limit, groups=gen_set, storage=storage )
return [m, gen_set]
from oemof.solph import EnergySystem, Model, Bus, Sink, Source, Transformer, Flow
periods = 20
timeindex = pd.date_range(start='2020-01-01', periods=periods, freq='H')
x = np.arange(0, periods, 1)
demand_ts = 0.5 * np.cos(x) + 1
pv_ts = 0.5 * np.sin(x) + 0.5
es = EnergySystem(timeindex=timeindex)
bus_el = Bus(label='electricity_bus')
bus_gas = Bus(label='gas_bus')
source_gas = Source(label='gas_source',
outputs={bus_gas: Flow(variable_costs=100)})
gas_pp = Transformer(label='powerplant',
inputs={bus_gas: Flow()},
outputs={bus_el: Flow(nominal_value=10)})
pv = Source(label='pv',
outputs={bus_el: Flow(nominal_value=5,
fixed=True,
actual_value=pv_ts)})
def test_connect_invest():
date_time_index = pd.date_range('1/1/2012', periods=24 * 7, freq='H')
energysystem = EnergySystem(timeindex=date_time_index)
network.Node.registry = energysystem
# Read data file
full_filename = os.path.join(os.path.dirname(__file__),
'connect_invest.csv')
data = pd.read_csv(full_filename, sep=",")
logging.info('Create oemof objects')
# create electricity bus
bel1 = Bus(label="electricity1")
bel2 = Bus(label="electricity2")
# create excess component for the electricity bus to allow overproduction
Sink(label='excess_bel', inputs={bel2: Flow()})
Source(label='shortage', outputs={bel2: Flow(variable_costs=50000)})
# create fixed source object representing wind power plants
Source(label='wind',
outputs={bel1: Flow(fix=data['wind'], nominal_value=1000000)})
# create simple sink object representing the electrical demand
Sink(label='demand',
inputs={bel1: Flow(fix=data['demand_el'], nominal_value=1)})
storage = components.GenericStorage(
label='storage',
inputs={bel1: Flow(variable_costs=10e10)},
outputs={bel1: Flow(variable_costs=10e10)},
loss_rate=0.00,
initial_storage_level=0,
invest_relation_input_capacity=1 / 6,
invest_relation_output_capacity=1 / 6,
inflow_conversion_factor=1,
outflow_conversion_factor=0.8,
investment=Investment(ep_costs=0.2),
)
line12 = Transformer(
label="line12",
inputs={bel1: Flow()},
outputs={bel2: Flow(investment=Investment(ep_costs=20))})
line21 = Transformer(
label="line21",
inputs={bel2: Flow()},
outputs={bel1: Flow(investment=Investment(ep_costs=20))})
om = Model(energysystem)
constraints.equate_variables(om, om.InvestmentFlow.invest[line12, bel2],
om.InvestmentFlow.invest[line21, bel1], 2)
constraints.equate_variables(
om, om.InvestmentFlow.invest[line12, bel2],
om.GenericInvestmentStorageBlock.invest[storage])
# if tee_switch is true solver messages will be displayed
logging.info('Solve the optimization problem')
om.solve(solver='cbc')
# check if the new result object is working for custom components
results = processing.results(om)
my_results = dict()
my_results['line12'] = float(views.node(results, 'line12')['scalars'])
my_results['line21'] = float(views.node(results, 'line21')['scalars'])
stor_res = views.node(results, 'storage')['scalars']
my_results['storage_in'] = stor_res[(('electricity1', 'storage'),
'invest')]
my_results['storage'] = stor_res[(('storage', 'None'), 'invest')]
my_results['storage_out'] = stor_res[(('storage', 'electricity1'),
'invest')]
connect_invest_dict = {
'line12': 814705,
'line21': 1629410,
'storage': 814705,
'storage_in': 135784,
'storage_out': 135784
}
for key in connect_invest_dict.keys():
eq_(int(round(my_results[key])), int(round(connect_invest_dict[key])))
# Input Data Reading
timeseries = pd.read_excel(datapath, sheet_name="timeseries", index_col=[0], parse_dates=True)
timeseries.index.freq = "1H"
costs = pd.read_excel(datapath, sheet_name="costs", index_col=[0])
capacity = pd.read_excel(datapath, sheet_name="capacity", index_col=[0])
print("Data and results paths have been created. Input data have been read.")
# Energy System Creation
es = EnergySystem(timeindex=timeseries.index)
setattr(es, "typemap", fc.TYPEMAP)
print("The energy system has been created.")
# Bus Creation
elec_bus_NDE = Bus(label="elec_Bus_NDE")
elec_bus_SDE = Bus(label="elec_Bus_SDE")
heat_bus_NDE = Bus(label="heat_Bus_NDE")
heat_bus_SDE = Bus(label="heat_Bus_SDE")
fuel_bus_NDE = Bus(label="fuel_Bus_NDE")
fuel_bus_SDE = Bus(label="fuel_Bus_SDE")
# Bus Addition to the Energy Sytem
es.add(elec_bus_NDE, elec_bus_SDE, heat_bus_NDE, heat_bus_SDE, fuel_bus_NDE, fuel_bus_SDE)
# Bus Linking
es.add(fc.Link(
label='link',
carrier='electricity',
from_bus=elec_bus_NDE,
to_bus=elec_bus_SDE,
def test_dispatch_one_time_step(solver='cbc'):
"""Create an energy system and optimize the dispatch at least costs."""
# ######################### create energysystem components ################
Node.registry = None
# resource buses
bgas = Bus(label='gas', balanced=False)
# electricity and heat
bel = Bus(label='b_el')
bth = Bus(label='b_th')
# an excess and a shortage variable can help to avoid infeasible problems
excess_el = Sink(label='excess_el', inputs={bel: Flow()})
# sources
wind = Source(
label='wind',
outputs={bel: Flow(actual_value=0.5, nominal_value=66.3, fixed=True)})
# demands (electricity/heat)
demand_el = Sink(
label='demand_elec',
inputs={bel: Flow(nominal_value=85, actual_value=0.3, fixed=True)})
demand_th = Sink(
label='demand_therm',
inputs={bth: Flow(nominal_value=40, actual_value=0.2, fixed=True)})
# combined heat and power plant (chp)
pp_chp = Transformer(label='pp_chp',
inputs={bgas: Flow()},
outputs={
bel: Flow(nominal_value=30, variable_costs=42),
bth: Flow(nominal_value=40)
},
conversion_factors={
bel: 0.3,
bth: 0.4
})
# heatpump with a coefficient of performance (COP) of 3
b_heat_source = Bus(label='b_heat_source')
heat_source = Source(label='heat_source', outputs={b_heat_source: Flow()})
cop = 3
heat_pump = Transformer(label='heat_pump',
inputs={
bel: Flow(),
b_heat_source: Flow()
},
outputs={bth: Flow(nominal_value=10)},
conversion_factors={
bel: 1 / 3,
b_heat_source: (cop - 1) / cop
})
energysystem = EnergySystem(timeindex=[1])
energysystem.add(bgas, bel, bth, excess_el, wind, demand_el, demand_th,
pp_chp, b_heat_source, heat_source, heat_pump)
# ################################ optimization ###########################
# create optimization model based on energy_system
optimization_model = Model(energysystem=energysystem, timeincrement=1)
# solve problem
optimization_model.solve(solver=solver)
# write back results from optimization object to energysystem
optimization_model.results()
# ################################ results ################################
data = views.node(processing.results(om=optimization_model), 'b_el')
# generate results to be evaluated in tests
results = data['sequences'].sum(axis=0).to_dict()
test_results = {
(('wind', 'b_el'), 'flow'): 33,
(('b_el', 'demand_elec'), 'flow'): 26,
(('b_el', 'excess_el'), 'flow'): 5,
(('b_el', 'heat_pump'), 'flow'): 3,
}
for key in test_results.keys():
eq_(int(round(results[key])), int(round(test_results[key])))
