Customising your model#
The example models that come with Euro-Calliope are complete models that you can run using Calliope. However, it's unlikely that these models fit your purpose optimally. To make them fit-for-purpose, Euro-Calliope models can be configured, adapted, and extended. You have the following three options:
Manual changes#
With the Calliope model in your hands, you will be able to change any model parameter, any technology specifics, and the model definition to your liking.
This kind of customisation can be useful to get to know the model and its parameters.
To create reliable results, we advise making manual changes only to the model definition (example-model.yaml) as this makes it possible to trace those changes later.
A typical customisation here would be to change the solver from gurobi to an open-source solver, e.g. cbc (see Calliope's documentation).
We consider all Euro-Calliope model subcomponents (everything other than the model definition itself) as a toolbox from which you can choose to define your model -- see the Import customisation option.
Importing modules#
The example-model.yaml definition file in each resolution sub-directory (e.g. national/example-model.yaml) specifies a list of other files to bring together to describe the model (under the import key).
This list can be changed by the modeller to select a combination of different files (see also Calliope's documentation).
These files represent "modules" of the model definition and contain everything necessary for a given technology or technology group to exist.
For instance, techs/supply/hydro.yaml defines two technologies (under the techs key) which will convert river flows into electricity.
It also places that technology in every relevant modelled location (under the locations key), along with any location-specific information that is needed; in this case, the maximum capacity of hydropower in that location.
Finally, there are potential overrides defined, which is an additional layer of customisation described further in the overrides section.
Only by including techs/supply/hydro.yaml in the list of imports in example-model.yaml will the defined hydropower technologies exist in the built Calliope model.
By default, the example model definition imports all modules except electricity transmission, so you can simply remove any modules from the list of imports if you do not want to consider that technology / technology group in your study.
The modules are in the techs subdirectory of each spatial resolution (e.g. national/techs/...).
Here, we describe each module in terms of the technologies they contain (calliope name:full name) and the overrides they make available (calliope name: override description) .
demand/electricity.yaml
demand_elec: Electricity demand
demand/electrified-transport.yaml
demand_road_transport_electrified_uncontrolled: Share of electrified road transport demand which is uncontrolled.
demand_road_transport_historic_electrified_uncontrolled: Removes historically electrified road transport demand to avoid double counting. It is assumed uncontrolled.
demand_road_transport_electrified_controlled: Share of electrified road transport demand whose charging is optimised by the solver.
keep-historic-electricity-demand-from-road-transport: Keep historically electrified road transport demand. Historically electrified road transport demand is deleted by default, as it is already considered in historic electricity demand and would thus be counted twice. Using this override together with Euro-Calliope's default electricity demand is not advised.
(year)_transport_controlled_electrified_demand: Total electrified road transport demand whose charging is optimised by the solver.
demand/electrified-heat.yaml
demand_heat_electrified: Electrified heat demand
demand_heat_historic_electrified: Removes historically electrified heat demand to avoid double counting
keep-historic-electricity-demand-from-heat: Keep historically electrified heat demand. Historically electrified heat demand is deleted by default, as it is already considered in historic electricity demand and would thus be counted twice. Using this override together with Euro-Calliope's default electricity demand is not advised.
storage/electricity.yaml
battery: Battery storage
hydrogen: Hydrogen power storage
exclusive-energy-to-power-ratios: Constrain the energy to power ratios of battery and hydrogen storage in a way that they do not overlap (in Calliope terms, energy="storage capacity", power="energy capacity"). Battery storage is constrained to a ratio of ≤4h while hydrogen is constrained to a ratio of ≥4h. The ratio is derived from typical values of commercial lithium-ion batteries available today (2021). Constraining hydrogen storage as well ensures it does not directly compete with battery storage, but is used instead for durations of fours hours and longer.
storage/hydro.yaml
pumped_hydro: Pumped hydro power storage
no-hydro-storage-fixed-cost: Set installation costs of pumped hydro storage to zero.
freeze-hydro-storage-capacities: Force discharge and storage capacities of hydropower to today's levels instead of using today's level as the maximum (you may also want to apply "no-hydro-storage-fixed-cost").
supply/biofuel.yaml
biofuel: Biofuel
supply/hydro.yaml
hydro_reservoir: Hydro electricity with a reservoir.
hydro_run_of_river: Run of river hydro electricity
no-hydro-supply-fixed-cost: Set installation costs of hydropower supply technologies to zero.
schroeder-hydro-cost: Override hydropower supply cost and lifetime projections from the JRC Energy Technology Reference Indicator 2014 with those from Schröder et al. (2013).
freeze-hydro-supply-capacities: Force discharge and storage capacities of hydropower to today's levels instead of using today's level as the maximum (you may also want to apply "no-hydro-supply-fixed-cost").
supply/load-shedding.yaml
load_shedding: Load shedding as last resort
load-shedding: Add an option to shed load at each location.
In Euro-Calliope, we model load shedding not as actual reduction of demand but as an unconstrained supply of electricity.
This supply has high variable cost (see tech-cost.yaml parameter file) and no fixed cost.
Due to its high cost, it will only be used when no other, less costly, option is available.
Calliope provides a built-in mechanism that is similar: ensure-feasibility.
The benefit of using the load-shedding override over Calliope's built-in mechanism is that it is more targeted towards modelling shedding of electrical load and provides more flexibility -- for example in terms of the cost of shed load.
supply/nuclear.yaml
nuclear: Nuclear power
supply/open-field-solar-and-wind-onshore.yaml
open_field_pv: Open field PV
wind_onshore_competing: Onshore wind competing with open field PV on land
wind_onshore_monopoly: Onshore wind without land competition
dea-renewable-cost-pv-open-field: Override open field PV cost and lifetime projections from the JRC Energy Technology Reference Indicator 2014 with those from the Danish Energy Agency.
dea-renewable-cost-wind-onshore: Override onshore wind cost and lifetime projections from the JRC Energy Technology Reference Indicator 2014 with those from the Danish Energy Agency.
supply/rooftop-solar.yaml
roof_mounted_pv: Roof mounted PV
dea-renewable-cost-pv-roof-mounted: Override cost and lifetime projections from the JRC Energy Technology Reference Indicator 2014 with those from the Danish Energy Agency
directional-rooftop-pv: By default, Euro-Calliope contains a single technology for rooftop PV. This technology comprises the total rooftop PV potential in each location, in particular including east-, west-, and north-facing rooftops. While this allows you the model fully exploit the potential of rooftop PV, it leads to less than optimal capacity factors as long as the potential is not fully exploited. That is because in reality, one would likely first exploit all south-facing rooftops, then east- and west-facing rooftops, and only then -- if at all -- north-facing rooftops. When using this override, there are three technologies instead of just one for rooftop PV. The three technologies comprise (1) south-facing PV (on either south-facing or flat rooftops), (2) east- and west-facing PV, and (3) north-facing PV. This leads to higher capacity factors of rooftop PV as long as the potential of rooftop PV is not fully exploited. However, this also increases the complexity of the model.
supply/wind-offshore.yaml
wind_offshore: Offshore wind
dea-renewable-cost-wind-offshore: Override offshore wind cost and lifetime projections from the JRC Energy Technology Reference Indicator 2014 with those from the Danish Energy Agency.
transmission/electricity-entsoe.yaml
ac_transmission: High voltage AC transmission line
free_transmission: Local power transmission
transmission/electricity-linked-neighbours.yaml
ac_transmission: High voltage AC transmission line
free_transmission: Local power transmission
Overrides and scenarios#
Calliope overrides enable models to be easily manipulated.
An override named freeze-hydro-supply-capacities can be used for example in this way:
calliope run build/models/continental/example-model.yaml --scenario=freeze-hydro-supply-capacities
import calliope
model = calliope.Model("build/models/continental/example-model.yaml", scenario="freeze-hydro-supply-capacities")
model.run()
Overrides can also be chained, enabling multiple scenarios to built up from multiple overrides.
For instance, freeze-hydro-supply-capacities and freeze-hydro-storage-capacities can be combined to freeze-hydro-supply-capacities,freeze-hydro-storage-capacities.
You can also define your own overrides to manipulate any model component. We recommend you add these overrides into the model definition YAML file, to ensure they are easy to trace.
In Calliope, scenarios are groups of overrides and/or other scenarios.
In Euro-Calliope, it can be helpful to define scenarios to help group similar overrides together.
For instance, cost overrides from the Danish Energy Agency are defined in various files, since they are loaded in alongside the technologies they affect (the option to override offshore wind costs only exists when you load the techs/supply/wind-offshore.yaml module).
You can pre-define scenarios in your model definition file, such as:
scenarios:
dea-renewable-cost: [dea-renewable-cost-pv-open-field, dea-renewable-cost-wind-onshore, dea-renewable-cost-wind-offshore, dea-renewable-cost-pv-roof-mounted]
Then you can load in the scenario into calliope as follows:
calliope run build/models/continental/example-model.yaml --scenario=dea-renewable-cost
In the above example, if you choose not to load the offshore wind module into your model, then the scenario you define would become:
scenarios:
dea-renewable-cost: [dea-renewable-cost-pv-open-field, dea-renewable-cost-wind-onshore, dea-renewable-cost-pv-roof-mounted]
Similar overrides which you may wish to group together are:
freeze-hydro-capacities: [freeze-hydro-supply-capacities, freeze-hydro-storage-capacities]
dea-renewable-cost: [dea-renewable-cost-pv-open-field, dea-renewable-cost-wind-onshore, dea-renewable-cost-wind-offshore, dea-renewable-cost-pv-roof-mounted]
no-hydro-fixed-cost: [no-hydro-supply-fixed-cost, no-hydro-storage-fixed-cost]
Rebuild#
When above options do not provide enough flexibility for you, you can rebuild the model using Euro-Calliope's workflow and use the customisation options of the workflow.