pywr.nodes.SeasonalVirtualStorage

class pywr.nodes.SeasonalVirtualStorage(*args, **kwargs)

A virtual storage node that operates only for a specified period within a year.

This node is most useful for representing licences that are only enforced during specified periods. The reset_day and reset_month parameters indicate when the node starts operating and the end_day and end_month when it stops operating. For the period when the node is not operating, the volume of the node remains unchanged and the node does not apply any constraints to the model.

The end_day and end_month can represent a date earlier in the year that the reset_day and and reset_month. This situation represents a licence that operates across a year boundary. For example, one that is active between October and March and not active between April and September.

Parameters:

reset_dayint

The day of the month (0-31) when the node starts operating and its volume is reset to the initial value or maximum volume.

reset_monthint

The month of the year (0-12) when the node starts operating and its volume is reset to the initial value or maximum volume.

reset_to_initial_volumebool

Reset the volume to the initial volume instead of maximum volume each year (default is False).

end_dayint

The day of the month (0-31) when the node stops operating.

end_monthint

The month of the year (0-12) when the node stops operating.

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
after(self, Timestep ts, double[)
before(self, Timestep ts)	Called at the beginning of the timestep
check(self)
commit(self, int scenario_index, double value)	Called once for each route the node is a member of
commit_all(self, double[)	Called once for each route the node is a member of
finalise_load()	Finish loading a node by converting parameter name references to instance references.
finish(self)
get_all_cost(self, double[)
get_all_max_volume(self, double[)
get_all_min_volume(self, double[)
get_area(self, ScenarioIndex scenario_index)
get_cost(self, ScenarioIndex scenario_index)	Get the cost per unit flow at a given timestep
get_current_pc(self, ...)	Return the current proportion of full of the storage node.
get_initial_pc(self)	Returns the initial volume as a proportion.
get_initial_volume(self)	Returns the absolute initial volume.
get_level(self, ScenarioIndex scenario_index)
get_max_volume(self, ...)
get_min_volume(self, ...)
pre_load(model, data)	Create a node instance from data.
reset(self)
setup(self, model)	Called before the first run of the model

Attributes

active	active: 'bool'
allow_isolated	A property to flag whether this Node can be unconnected in a network.
area
comment	comment: basestring
component_attrs
components	Generator that returns all of the Components attached to the Node
cost	The cost per unit increased in volume stored
current_pc	Current proportion full.
domain
factors
flow	Total flow via this node in the current timestep
fully_qualified_name
has_fixed_cost	Returns true if cost is not a Parameter.
initial_volume
initial_volume_pc
level
max_volume
min_volume
model	The recorder for the node, e.g. a NumpyArrayRecorder.
name	Name of the node.
nodes
parent	The parent Node/Storage of this object.
prev_flow	Total flow via this node in the previous timestep
recorders	Returns a list of pywr.recorders.Recorder objects attached to this node.
virtual	virtual: 'bool'
volume