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Replace large CHP 2-link feasibility diagram with single link

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In almost 99.5% of cases the CHP dispatches along the backpressure
line where heat output is proportional to electricity output.

So we can switch to a single link to avoid the burden of modelling the
full electricity-heat feasibility space of CHPs.

This only applies to large CHPs in district heating networks.
This commit is contained in:
Tom Brown 2020-12-07 10:48:24 +01:00
parent 21c4fd4761
commit 47a618f385
3 changed files with 43 additions and 88 deletions
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3
scripts/make_summary.py
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@ -28,10 +28,13 @@ opt_name = {"Store": "e", "Line" : "s", "Transformer" : "s"}
override_component_attrs = pypsa.descriptors.Dict({k : v.copy() for k,v in pypsa.components.component_attrs.items()})
override_component_attrs["Link"].loc["bus2"] = ["string",np.nan,np.nan,"2nd bus","Input (optional)"]
override_component_attrs["Link"].loc["bus3"] = ["string",np.nan,np.nan,"3rd bus","Input (optional)"]
override_component_attrs["Link"].loc["bus4"] = ["string",np.nan,np.nan,"4th bus","Input (optional)"]
override_component_attrs["Link"].loc["efficiency2"] = ["static or series","per unit",1.,"2nd bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["efficiency3"] = ["static or series","per unit",1.,"3rd bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["efficiency4"] = ["static or series","per unit",1.,"4th bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["p2"] = ["series","MW",0.,"2nd bus output","Output"]
override_component_attrs["Link"].loc["p3"] = ["series","MW",0.,"3rd bus output","Output"]
override_component_attrs["Link"].loc["p4"] = ["series","MW",0.,"4th bus output","Output"]
override_component_attrs["StorageUnit"].loc["p_dispatch"] = ["series","MW",0.,"Storage discharging.","Output"]
override_component_attrs["StorageUnit"].loc["p_store"] = ["series","MW",0.,"Storage charging.","Output"]

125
scripts/prepare_sector_network.py
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@ -30,10 +30,13 @@ from vresutils.costdata import annuity
override_component_attrs = pypsa.descriptors.Dict({k : v.copy() for k,v in pypsa.components.component_attrs.items()})
override_component_attrs["Link"].loc["bus2"] = ["string",np.nan,np.nan,"2nd bus","Input (optional)"]
override_component_attrs["Link"].loc["bus3"] = ["string",np.nan,np.nan,"3rd bus","Input (optional)"]
override_component_attrs["Link"].loc["bus4"] = ["string",np.nan,np.nan,"4th bus","Input (optional)"]
override_component_attrs["Link"].loc["efficiency2"] = ["static or series","per unit",1.,"2nd bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["efficiency3"] = ["static or series","per unit",1.,"3rd bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["efficiency4"] = ["static or series","per unit",1.,"4th bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["p2"] = ["series","MW",0.,"2nd bus output","Output"]
override_component_attrs["Link"].loc["p3"] = ["series","MW",0.,"3rd bus output","Output"]
override_component_attrs["Link"].loc["p4"] = ["series","MW",0.,"4th bus output","Output"]
override_component_attrs["Link"].loc["build_year"] = ["integer","year",np.nan,"build year","Input (optional)"]
override_component_attrs["Link"].loc["lifetime"] = ["float","years",np.nan,"lifetime","Input (optional)"]
@ -1226,63 +1229,35 @@ def add_heat(network):
if name == "urban central":
#add gas CHP; biomass CHP is added in biomass section
network.madd("Link",
nodes[name] + " urban central gas CHP electric",
nodes[name] + " urban central gas CHP",
bus0="EU gas",
bus1=nodes[name],
bus2="co2 atmosphere",
carrier="urban central gas CHP electric",
bus2=nodes[name] + " urban central heat",
bus3="co2 atmosphere",
carrier="urban central gas CHP",
p_nom_extendable=True,
capital_cost=costs.at['central gas CHP','fixed']*costs.at['central gas CHP','efficiency'],
capital_cost=costs.at['central gas CHP','fixed']*costs.at['central gas CHP','efficiency']/(1+costs.at['central gas CHP','c_v']/costs.at['central gas CHP','c_b']),
marginal_cost=costs.at['central gas CHP','VOM'],
efficiency=costs.at['central gas CHP','efficiency'],
efficiency2=costs.at['gas','CO2 intensity'],
c_b=costs.at['central gas CHP','c_b'],
c_v=costs.at['central gas CHP','c_v'],
p_nom_ratio=costs.at['central gas CHP','p_nom_ratio'],
efficiency=costs.at['central gas CHP','efficiency']/(1+costs.at['central gas CHP','c_v']/costs.at['central gas CHP','c_b']),
efficiency2=costs.at['central gas CHP','efficiency']/(1+costs.at['central gas CHP','c_v']/costs.at['central gas CHP','c_b'])/costs.at['central gas CHP','c_b'],
efficiency3=costs.at['gas','CO2 intensity'],
lifetime=costs.at['central gas CHP','lifetime'])
network.madd("Link",
nodes[name] + " urban central gas CHP heat",
bus0="EU gas",
bus1=nodes[name] + " urban central heat",
bus2="co2 atmosphere",
carrier="urban central gas CHP heat",
p_nom_extendable=True,
marginal_cost=costs.at['central gas CHP','VOM'],
efficiency=costs.at['central gas CHP','efficiency']/costs.at['central gas CHP','c_v'],
efficiency2=costs.at['gas','CO2 intensity'],
lifetime=costs.at['central gas CHP','lifetime'])
network.madd("Link",
nodes[name] + " urban central gas CHP CCS electric",
nodes[name] + " urban central gas CHP CCS",
bus0="EU gas",
bus1=nodes[name],
bus2="co2 atmosphere",
bus3="co2 stored",
carrier="urban central gas CHP CCS electric",
bus2=nodes[name] + " urban central heat",
bus3="co2 atmosphere",
bus4="co2 stored",
carrier="urban central gas CHP CCS",
p_nom_extendable=True,
capital_cost=costs.at['central gas CHP CCS','fixed']*costs.at['central gas CHP CCS','efficiency'],
capital_cost=costs.at['central gas CHP CCS','fixed']*costs.at['central gas CHP CCS','efficiency']/(1+costs.at['central gas CHP CCS','c_v']/costs.at['central gas CHP CCS','c_b']),
marginal_cost=costs.at['central gas CHP CCS','VOM'],
efficiency=costs.at['central gas CHP CCS','efficiency'],
efficiency2=costs.at['gas','CO2 intensity']*(1-options["ccs_fraction"]),
efficiency3=costs.at['gas','CO2 intensity']*options["ccs_fraction"],
c_b=costs.at['central gas CHP CCS','c_b'],
c_v=costs.at['central gas CHP CCS','c_v'],
p_nom_ratio=costs.at['central gas CHP CCS','p_nom_ratio'],
lifetime=costs.at['central gas CHP CCS','lifetime'])
network.madd("Link",
nodes[name] + " urban central gas CHP CCS heat",
bus0="EU gas",
bus1=nodes[name] + " urban central heat",
bus2="co2 atmosphere",
bus3="co2 stored",
carrier="urban central gas CHP CCS heat",
p_nom_extendable=True,
marginal_cost=costs.at['central gas CHP CCS','VOM'],
efficiency=costs.at['central gas CHP CCS','efficiency']/costs.at['central gas CHP CCS','c_v'],
efficiency2=costs.at['gas','CO2 intensity']*(1-options["ccs_fraction"]),
efficiency3=costs.at['gas','CO2 intensity']*options["ccs_fraction"],
efficiency=costs.at['central gas CHP CCS','efficiency']/(1+costs.at['central gas CHP CCS','c_v']/costs.at['central gas CHP CCS','c_b']),
efficiency2=costs.at['central gas CHP CCS','efficiency']/(1+costs.at['central gas CHP CCS','c_v']/costs.at['central gas CHP CCS','c_b'])/costs.at['central gas CHP CCS','c_b'],
efficiency3=costs.at['gas','CO2 intensity']*(1-options["ccs_fraction"]),
efficiency4=costs.at['gas','CO2 intensity']*options["ccs_fraction"],
lifetime=costs.at['central gas CHP CCS','lifetime'])
else:
@ -1475,61 +1450,35 @@ def add_biomass(network):
urban_central = urban_central.str[:-len(" urban central heat")]
network.madd("Link",
urban_central + " urban central solid biomass CHP electric",
urban_central + " urban central solid biomass CHP",
bus0="EU solid biomass",
bus1=urban_central,
carrier="urban central solid biomass CHP electric",
bus2=urban_central + " urban central heat",
carrier="urban central solid biomass CHP",
p_nom_extendable=True,
capital_cost=costs.at['central solid biomass CHP','fixed']*costs.at['central solid biomass CHP','efficiency'],
capital_cost=costs.at['central solid biomass CHP','fixed']*costs.at['central solid biomass CHP','efficiency']/(1+costs.at['central solid biomass CHP','c_v']/costs.at['central solid biomass CHP','c_b']),
marginal_cost=costs.at['central solid biomass CHP','VOM'],
efficiency=costs.at['central solid biomass CHP','efficiency'],
c_b=costs.at['central solid biomass CHP','c_b'],
c_v=costs.at['central solid biomass CHP','c_v'],
p_nom_ratio=costs.at['central solid biomass CHP','p_nom_ratio'],
lifetime=costs.at['central solid biomass CHP','lifetime'])
network.madd("Link",
urban_central + " urban central solid biomass CHP heat",
bus0="EU solid biomass",
bus1=urban_central + " urban central heat",
carrier="urban central solid biomass CHP heat",
p_nom_extendable=True,
marginal_cost=costs.at['central solid biomass CHP','VOM'],
efficiency=costs.at['central solid biomass CHP','efficiency']/costs.at['central solid biomass CHP','c_v'],
efficiency=costs.at['central solid biomass CHP','efficiency']/(1+costs.at['central solid biomass CHP','c_v']/costs.at['central solid biomass CHP','c_b']),
efficiency2=costs.at['central solid biomass CHP','efficiency']/(1+costs.at['central solid biomass CHP','c_v']/costs.at['central solid biomass CHP','c_b'])/costs.at['central solid biomass CHP','c_b'],
lifetime=costs.at['central solid biomass CHP','lifetime'])
network.madd("Link",
urban_central + " urban central solid biomass CHP CCS electric",
urban_central + " urban central solid biomass CHP CCS",
bus0="EU solid biomass",
bus1=urban_central,
bus2="co2 atmosphere",
bus3="co2 stored",
carrier="urban central solid biomass CHP CCS electric",
bus2=urban_central + " urban central heat",
bus3="co2 atmosphere",
bus4="co2 stored",
carrier="urban central solid biomass CHP CCS",
p_nom_extendable=True,
capital_cost=costs.at['central solid biomass CHP CCS','fixed']*costs.at['central solid biomass CHP CCS','efficiency'],
capital_cost=costs.at['central solid biomass CHP CCS','fixed']*costs.at['central solid biomass CHP CCS','efficiency']/(1+costs.at['central solid biomass CHP CCS','c_v']/costs.at['central solid biomass CHP CCS','c_b']),
marginal_cost=costs.at['central solid biomass CHP CCS','VOM'],
efficiency=costs.at['central solid biomass CHP CCS','efficiency'],
efficiency2=-costs.at['solid biomass','CO2 intensity']*options["ccs_fraction"],
efficiency3=costs.at['solid biomass','CO2 intensity']*options["ccs_fraction"],
c_b=costs.at['central solid biomass CHP','c_b'],
c_v=costs.at['central solid biomass CHP','c_v'],
p_nom_ratio=costs.at['central solid biomass CHP','p_nom_ratio'],
efficiency=costs.at['central solid biomass CHP CCS','efficiency']/(1+costs.at['central solid biomass CHP CCS','c_v']/costs.at['central solid biomass CHP CCS','c_b']),
efficiency2=costs.at['central solid biomass CHP CCS','efficiency']/(1+costs.at['central solid biomass CHP CCS','c_v']/costs.at['central solid biomass CHP CCS','c_b'])/costs.at['central solid biomass CHP CCS','c_b'],
efficiency3=-costs.at['solid biomass','CO2 intensity']*options["ccs_fraction"],
efficiency4=costs.at['solid biomass','CO2 intensity']*options["ccs_fraction"],
lifetime=costs.at['central solid biomass CHP CCS','lifetime'])
network.madd("Link",
urban_central + " urban central solid biomass CHP CCS heat",
bus0="EU solid biomass",
bus1=urban_central + " urban central heat",
bus2="co2 atmosphere",
bus3="co2 stored",
carrier="urban central solid biomass CHP CCS heat",
p_nom_extendable=True,
marginal_cost=costs.at['central solid biomass CHP CCS','VOM'],
efficiency=costs.at['central solid biomass CHP CCS','efficiency']/costs.at['central solid biomass CHP CCS','c_v'],
efficiency2=-costs.at['solid biomass','CO2 intensity']*options["ccs_fraction"],
efficiency3=costs.at['solid biomass','CO2 intensity']*options["ccs_fraction"],
lifetime=costs.at['central solid biomass CHP CCS','lifetime'])
def add_industry(network):

3
scripts/solve_network.py
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@ -28,10 +28,13 @@ from vresutils.benchmark import memory_logger
override_component_attrs = pypsa.descriptors.Dict({k : v.copy() for k,v in pypsa.components.component_attrs.items()})
override_component_attrs["Link"].loc["bus2"] = ["string",np.nan,np.nan,"2nd bus","Input (optional)"]
override_component_attrs["Link"].loc["bus3"] = ["string",np.nan,np.nan,"3rd bus","Input (optional)"]
override_component_attrs["Link"].loc["bus4"] = ["string",np.nan,np.nan,"4th bus","Input (optional)"]
override_component_attrs["Link"].loc["efficiency2"] = ["static or series","per unit",1.,"2nd bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["efficiency3"] = ["static or series","per unit",1.,"3rd bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["efficiency4"] = ["static or series","per unit",1.,"4th bus efficiency","Input (optional)"]
override_component_attrs["Link"].loc["p2"] = ["series","MW",0.,"2nd bus output","Output"]
override_component_attrs["Link"].loc["p3"] = ["series","MW",0.,"3rd bus output","Output"]
override_component_attrs["Link"].loc["p4"] = ["series","MW",0.,"4th bus output","Output"]