Components

The names are corresponding to c.static.index for non stochastic networks. For stochastic networks the index will be, multi-indexed while here only the name dimension is returned.

Returns:

Series –

Series with component names as index and values.

Examples:

>>> n = pypsa.Network()
>>> n.add("Generator", "g1")
>>> n.add("Generator", "g2")
>>> n.generators.index
Index(['g1', 'g2'], dtype='object', name='name')

pypsa.Components.snapshots `property` ¶

snapshots: Index | MultiIndex

Snapshots of the network.

See Also

pypsa.Network.snapshots

pypsa.Components.has_scenarios `property` ¶

has_scenarios: bool

Boolean indicating if the network has scenarios defined.

pypsa.Components.scenarios `property` ¶

scenarios: Index

Scenarios of networks.

pypsa.Components.has_investment_periods `property` ¶

has_investment_periods: bool

Indicator whether network has investment periods.

pypsa.Network.has_investment_periods

See Also

pypsa.Components.has_periods `property` ¶

has_periods: bool

Investment periods of the network.

pypsa.Components.investment_periods `property` ¶

investment_periods: Index

Investment periods of the network.

pypsa.Network.investment_periods

See Also

pypsa.Components.da `instance-attribute` ¶

da = _XarrayAccessor(self)

xArray accessor to get component attributes as xarray DataArray.

Examples:

>>> c = n.components.generators
>>> c.da.p_max_pu
<xarray.DataArray 'p_max_pu' (snapshot: 10, name: 6)> Size: 480B
array([[0.93001988, 1.        , 0.9745832 , 1.        , 0.5590784 ,
      ...
        1.        ]])
Coordinates:
* snapshot  (snapshot) datetime64[ns] 80B 2015-01-01 ... 2015-01-01T09:00:00
* name      (name) object 48B 'Manchester Wind' ... 'Frankfurt Gas'

For stochastic networks the scenarios are unstacked automatically:

>>> c = n_stoch.components.generators
>>> c.da.p_max_pu
<xarray.DataArray 'p_max_pu' (snapshot: 2920, scenario: 3, name: 4)> Size: 280kB
array([[[0.    , 0.1566, 1.    , 1.    ],
      ...
        [0.    , 0.1082, 1.    , 1.    ]]], shape=(2920, 3, 4))
Coordinates:
* snapshot  (snapshot) datetime64[ns] 23kB 2015-01-01 ... 2015-12-31T21:00:00
* scenario  (scenario) object 24B 'low' 'med' 'high'
* name      (name) object 32B 'solar' 'wind' 'gas' 'lignite'

String representation:

>>> c.da
<XarrayAccessor for Generators>

pypsa.Components.component_names `property` ¶

component_names: Series

Get component names.

Deprecated in v1.0.0

Use names instead.

Returns:

Series –

Series with component names as index and values.

pypsa.Components.timesteps `property` ¶

timesteps: Index

Time steps of the network.

See Also

pypsa.Network.timesteps

pypsa.Components.periods `property` ¶

periods: Index

Periods of the network.

See Also

pypsa.Network.periods

pypsa.Components.active_assets `property` ¶

active_assets: Index

Get list of active assets.

pypsa.Components.inactive_assets

See corresponding pypsa.Components.inactive_assets for details.

Returns:

Index –

List of active assets

See Also

pypsa.Components.inactive_assets `property` ¶

inactive_assets: Index

Get list of inactive assets.

pypsa.Components.get_active_assets

An asset is considered inactive when one of the following conditions is met: - active is set to False across all dimensions (investment periods, scenarios) - build_year + lifetime never satisfies the condition for any investment period

Inactive assets are not considered in the optimization and are excluded from the model entirely.

Returns:

Index –

List of inactive assets

Examples:

>>> n = pypsa.Network()
>>> n.snapshots = pd.MultiIndex.from_product([[2020, 2021, 2022], ["1", "2", "3"]])
>>> n.add("Generator", "g1", build_year=2020, lifetime=1)
>>> n.add("Generator", "g2", active=False)

List all components

>>> n.generators.index
Index(['g1', 'g2'], dtype='object', name='name')

List of inactive components 'g1' will be considered as active because it is active in at least one investment period

>>> n.components.generators.inactive_assets
Index(['g2'], dtype='object', name='name')

List of active components

>>> n.components.generators.active_assets
Index(['g1'], dtype='object', name='name')

c.active_assets and c.inactive_assets are mutually exclusive

See Also

pypsa.Components.standard_types `property` ¶

standard_types: DataFrame | None

Get standard types of component.

Returns:

DataFrame –

DataFrame with standard types of component.

Examples:

>>> n.components.transformers.standard_types

pypsa.Components.name `property` ¶

name: str

Name of component type.

Returns:

str –

Name of component.

Examples:

>>> n.components.generators.name
'Generator'

pypsa.Components.list_name `property` ¶

list_name: str

List name of component type.

Returns:

str –

List name of component.

Examples:

>>> n.components.generators.list_name
'generators'

pypsa.Components.description `property` ¶

description: str

Description of component.

Returns:

str –

Description of component.

Examples:

>>> n.components.generators.description
'Power generator for the bus carrier it attaches to.'

pypsa.Components.category `property` ¶

category: str

Category of component.

Returns:

str –

Category of component.

Examples:

>>> n.components.generators.category
'controllable_one_port'

pypsa.Components.type `property` ¶

type: str

Get category of component.

Note

While not actively deprecated yet, category is the preferred method to access component type.

Returns:

str –

Category of component.

pypsa.Components.attrs `property` ¶

attrs: DataFrame

Default values of corresponding component type.

Deprecated in v1.0.0

Use c.defaults instead.

Returns:

DataFrame –

DataFrame with component attribute names as index and the information like type, unit, default value and description as columns.

pypsa.Components.defaults `property` ¶

defaults: DataFrame

Default values of corresponding component type.

Returns:

DataFrame –

DataFrame with component attribute names as index and the information like type, unit, default value and description as columns.

Examples:

>>> n.components.generators.defaults.head()
             type unit default                                        description            status  static  varying              typ    dtype
attribute
name       string  NaN                                                Unique name  Input (required)    True    False    <class 'str'>   object
bus        string  NaN                 name of bus to which generator is attached  Input (required)    True    False    <class 'str'>   object
control    string  NaN      PQ  P,Q,V control strategy for PF, must be "PQ", "...  Input (optional)    True    False    <class 'str'>   object
type       string  NaN          Placeholder for generator type. Not yet implem...  Input (optional)    True    False    <class 'str'>   object
p_nom       float   MW     0.0          Nominal power for limits in optimization.  Input (optional)    True    False  <class 'float'>  float64

pypsa.Components.empty `property` ¶

empty: bool

Check if component is empty.

Returns:

bool –

True if component is empty, otherwise False.

Examples:

>>> n = pypsa.Network()
>>> n.add('Generator', 'g1')
>>> n.components.generators.empty
False

>>> n.components.buses.empty
True

pypsa.Components.attached `property` ¶

attached: bool

Check if component is attached to a Network.

Some functionality of the component is only available when attached to a Network.

Returns:

bool –

True if component is attached to a Network, otherwise False.

Examples:

>>> n.components.generators.attached
True

pypsa.Components.n_save `property` ¶

n_save: Any

A save property to access the network (component must be attached).

Returns:

Network –

Network to which the component is attached.

Raises:

AttributeError –

If component is not attached to a Network.

pypsa.Components.df `property` ¶

df: DataFrame

Get static data of all components as pandas DataFrame.

Deprecated in v1.0.0

Use c.static instead.

Returns:

DataFrame –

DataFrame with components as index and attributes as columns.

pypsa.Components.pnl `property` ¶

pnl: dict

Get dynamic data of all components as a dictionary of pandas DataFrames.

Deprecated in v1.0.0

Use c.dynamic instead.

Returns:

dict –

Dictionary of dynamic components. Keys are the attribute and each value is a pandas DataFrame with snapshots as index and the component names as columns.

pypsa.Components.ds `property` ¶

ds: Dataset

Create a xarray data array view of the component.

Note

Note that this will create a full copy of the component data. For large networks this may be a bottleneck. Use the pypsa.Components.da accessor instead to access a specific attribute of the component.

Returns:

Dataset –

Dataset with component attributes as variables and snapshots as coordinates.

See Also

pypsa.Components.da

Examples:

>>> c = n.components.generators
>>> c.ds
<xarray.Dataset> Size: 8kB
Dimensions:                     (name: 6, snapshot: 10)
Coordinates:
  * name                        (name) object 48B 'Manchester Wind' ... 'Fran...
  * snapshot                    (snapshot) datetime64[ns] 80B 2015-01-01 ... ...
Data variables: (12/48)
    bus                         (name) object 48B 'Manchester' ... 'Frankfurt'
    control                     (name) object 48B 'Slack' 'PQ' ... 'Slack' 'PQ'
    type                        (name) object 48B '' '' '' '' '' ''
    p_nom                       (name) float64 48B 80.0 5e+04 ... 110.0 8e+04
    p_nom_mod                   (name) float64 48B 0.0 0.0 0.0 0.0 0.0 0.0
    p_nom_extendable            (name) bool 6B True True True True True True
    ...                          ...
    ramp_limit_start_up         (name) float64 48B nan nan nan nan nan nan
    ramp_limit_shut_down        (name) float64 48B nan nan nan nan nan nan
    weight                      (name) float64 48B 1.0 1.0 1.0 1.0 1.0 1.0
    p_nom_opt                   (name) float64 48B 4.091e+03 0.0 ... 982.0
    capital_cost_piecewise_opt  (name) float64 48B 0.0 0.0 0.0 0.0 0.0 0.0
    p                           (snapshot, name) float64 480B 742.0 ... 483.2

pypsa.Components.units `property` ¶

units: Series

Get units of all attributes of components.

Returns:

Series –

Series with attribute names as index and units as values.

Examples:

>>> c = n.components.generators
>>> c.units.head()
                unit
attribute
p_nom            MW
p_nom_mod        MW
p_nom_min        MW
p_nom_max        MW
p_min_pu   per unit

pypsa.Components.ports `property` ¶

ports: list

Get ports of all components.

Returns:

Series –

Series with attribute names as index and port names as values.

Examples:

>>> c = n.components.lines
>>> c.ports
['0', '1']

pypsa.Components.unique_carriers `property` ¶

unique_carriers: set[str]

Get all unique carrier values for this component.

Returns:

set of str –

Set of all unique carrier names found in this component.

Examples:

>>> sorted(n.c.generators.unique_carriers)
['gas', 'wind']

>>> sorted(n.c.buses.unique_carriers)
['AC', 'DC']

pypsa.Components.extendables `property` ¶

extendables: Index

Get the index of extendable elements of this component.

Returns:

Index –

Single-level index of extendable elements.

pypsa.Components.fixed `property` ¶

fixed: Index

Get the index of non-extendable elements of this component.

Returns:

Index –

Single-level index of non-extendable elements.

pypsa.Components.committables `property` ¶

committables: Index

Get the index of committable elements of this component.

Returns:

Index –

Single-level index of committable elements.

pypsa.Components.maintainables `property` ¶

maintainables: Index

Get the index of maintainable elements of this component.

Returns:

Index –

Single-level index of maintainable elements.

pypsa.Components.modulars `property` ¶

modulars: Index

Get the index of modular elements of this component.

Modular components have a positive module size (e.g., p_nom_mod > 0) which introduces integer variables for capacity expansion.

Returns:

Index –

Single-level index of modular elements.

pypsa.Components.periodized_cost `property` ¶

periodized_cost: DataArray

Calculate periodized cost from component attributes as xarray DataArray.

See Also

pypsa.costs.periodized_cost

pypsa.Components.capital_cost `property` ¶

capital_cost: Series

Calculate annuitized investment cost per unit of capacity (no fom).

See Also

pypsa.costs.periodized_cost

pypsa.Components.nyears `property` ¶

nyears: float | Series

Return the modeled time horizon in years.

See Also

pypsa.Network.nyears

pypsa.Components.annuity `property` ¶

annuity: Series

Calculate annuity factor for all components.

Returns the annuity factor based on discount_rate and lifetime. If discount_rate is NaN (no overnight_cost provided), returns 1.0.

Returns:

Series –

Annuity factor for each component.

Examples:

>>> n.c.generators.annuity
name
gen1    0.085...
gen2    1.0
dtype: float64

See Also

pypsa.costs.annuity_factor

pypsa.Components.overnight_cost `property` ¶

overnight_cost: Series

Calculate overnight cost from component attributes.

If overnight_cost column is provided (not NaN), returns it directly. Otherwise, converts annualized capital_cost back to overnight cost using the formula: overnight_cost = capital_cost / (annuity_factor × nyears).

Note: When nyears == 1, capital_cost represents the annualized cost per year, so overnight_cost = capital_cost / annuity_factor.

Returns:

Series –

Overnight (upfront) investment cost per unit of capacity.

Examples:

>>> n.c.generators.overnight_cost
name
gen1    1000.0   # overnight_cost used directly
gen2    1166.0   # 100 / annuity(0.07, 25) - back-calculated from capital_cost
dtype: float64

See Also

capital_cost : Annuitized investment cost for the modeled horizon. annuity : Annuity factor for each component.

pypsa.Components.get_activity_mask ¶

get_activity_mask(sns: Sequence | None = None, index: Index | None = None) -> DataFrame

Get active components mask indexed by snapshots.

Gets the boolean mask for active components, indexed by snapshots and components instead of just components.

Parameters:

sns (Index, default: None ) –

Set of snapshots for the mask. If None (default) all snapshots are returned.
index (Index, default: None ) –

Subset of the component elements. If None (default) all components are returned.

Examples:

>>> n = pypsa.Network()
>>> n.snapshots = pd.MultiIndex.from_product([[2020, 2021, 2022], ["1", "2", "3"]])
>>> n.add("Generator", "g1", build_year=2020, lifetime=1)
>>> n.add("Generator", "g2", active=False)
>>> n.components.generators.get_activity_mask()
name                g1     g2
period timestep
2020   1          True  False
       2          True  False
       3          True  False
2021   1         False  False
       2         False  False
       3         False  False
2022   1         False  False
       2         False  False
       3         False  False

pypsa.Components.get_active_assets ¶

get_active_assets(investment_period: int | str | Sequence | None = None) -> Series

Get active components mask of component type in investment period(s).

A component is considered active when:

it's active attribute is True
it's build year + lifetime is smaller than the investment period (if given)

Parameters:

investment_period ((int, str, Sequence), default: None ) –

Investment period(s) to check for active within build year and lifetime. If none only the active attribute is considered and build year and lifetime are ignored. If multiple periods are given the mask is True if component is active in any of the given periods.

Returns:

Series –

Boolean mask for active components

Examples:

Without investment periods

>>> n = pypsa.Network()
>>> n.add("Generator", "g1", active=False)
>>> n.add("Generator", "g2", active=True)
>>> n.components.generators.get_active_assets()
name
g1    False
g2     True
Name: active, dtype: bool

With investment periods

>>> n = pypsa.Network()
>>> n.snapshots = pd.MultiIndex.from_product([[2020, 2021, 2022], ["1", "2", "3"]])
>>> n.add("Generator", "g1", build_year=2020, lifetime=1)
>>> n.add("Generator", "g2", active=False)
>>> n.components.generators.get_active_assets()
name
g1     True
g2    False
Name: active, dtype: bool

Referenced by:

API Reference Networks Network NetworkDescriptorsMixin get_active_assets

pypsa.Components.rename_component_names ¶

rename_component_names(**kwargs: str) -> None

Rename component names.

Rename components and also update all cross-references of the component in the network.

Parameters:

**kwargs (str, default: {} ) –

Mapping of old names to new names.

Examples:

Define some network

>>> n = pypsa.Network()
>>> n.add("Bus", ["bus1"])
>>> n.add("Generator", ["gen1"], bus="bus1")
>>> c = n.c.buses

Now rename the bus

>>> c.rename_component_names(bus1="bus2")

Which updates the bus components

>>> c.static.index
Index(['bus2'], dtype='str', name='name')

and all references in the network

>>> n.generators.bus
name
gen1    bus2
Name: bus, dtype: object

pypsa.Components.filter_by_active_assets ¶

filter_by_active_assets(data: DataFrame | Index, investment_period: int | float | Sequence | None = None) -> DataFrame | Index

Filter DataFrame or Index to only include active assets.

Parameters:

data (DataFrame | Index) –

DataFrame or Index to filter. Must have a "name" level in its index.
investment_period (int | float | Sequence, default: None ) –

If provided, additionally filter by assets active in this specific investment period(s). If a sequence is given, assets active in any of the periods are included. NaN values are treated as None (no period filtering).

Returns:

DataFrame | Index –

Filtered DataFrame or Index with only active assets.

Examples:

>>> n = pypsa.Network()
>>> n.add("Bus", "bus")
>>> n.add("Generator", "g1", bus="bus")
>>> n.add("Generator", "g2", bus="bus", active=False)
>>> df = n.generators[['p_nom', 'bus']]
>>> n.components.generators.filter_by_active_assets(df)
   p_nom  bus
name
g1     0.0  bus

pypsa.Components.str ¶

__str__() -> str

Get string representation of component.

Examples:

>>> str(n.components.generators)
"'Generator' Components"

pypsa.Components.repr ¶

__repr__() -> str

Get representation of component.

Examples:

>>> c = n.components.generators
>>> c
'Generator' Components
----------------------
Attached to PyPSA Network 'AC-DC-Meshed'
Components: 6

pypsa.Components.eq ¶

__eq__(other: object) -> bool

Check if two Components are equal.

Does not check the attached Network, but only component specific data. Therefore two components can be equal even if they are attached to different networks.

Parameters:

other (Any) –

Other object to compare with.

Returns:

bool –

True if components are equal, otherwise False.

See Also

pypsa.Components.equals

pypsa.Components.len ¶

__len__() -> int

Get the number of components.

Returns:

int –

Number of components.

Examples:

>>> len(n.components.generators)
6

Which is the same as:

>>> n.components.generators.static.shape[0]
6

pypsa.Components.equals ¶

equals(other: Any, log_mode: str = 'silent') -> bool

Check if two Components are equal.