Bus - Outputs

Output attributes are calculated by the optimization solver or power flow analysis. These values are read-only and represent the results of network calculations.

Basic

Attribute	Data Type	Unit	Default	Required	Storage Type	Description
control	string	n/a	PQ	No	static	P,Q,V control strategy for PF, must be "PQ", "PV" or "Slack". Note that this attribute is an output inherited from the controls of the generators attached to the bus; setting it directly on the bus will not have any effect.
generator	string	n/a	n/a	No	static	Name of slack generator attached to slack bus.
sub_network	string	n/a	n/a	No	static	Name of connected sub-network to which bus belongs. This attribute is set by PyPSA in the function network.determine_network_topology(); do not set it directly by hand.

Electrical

Attribute	Data Type	Unit	Default	Required	Storage Type	Description
p	float	MW	0	No	timeseries	active power at bus (positive if net generation at bus)
q	float	MVar	0	No	timeseries	reactive power (positive if net generation at bus)
v_mag_pu	float	per unit	1	No	timeseries	Voltage magnitude, per unit of v_nom
v_ang	float	radians	0	No	timeseries	Voltage angle

Costs

Attribute	Data Type	Unit	Default	Required	Storage Type	Description
marginal_price	float	currency/MWh	0	No	timeseries	Locational marginal price from LOPF from power balance constraint