External Grid

List of input parameters

Parameter	Description	Type	Value range	OpenDSS equivalent
name	a custom name	string	-	name
vm_pu*	voltage at the slack node in per unit	float	> 0	pu
va_degree	voltage angle at the slack node in degrees. Only considered in loadflow if calculate_voltage_angles = True	float	≥ 0	-
s_sc_max_mva**	maximal short circuit apparent power to calculate internal impedance of ext_grid for short circuit calculations	float	≥ 0	mvasc3
s_sc_min_mva**	minimal short circuit apparent power to calculate internal impedance of ext_grid for short circuit calculations	float	≥ 0	-
rx_max**	maximal R/X-ratio to calculate internal impedance of ext_grid for short circuit calculations	float	0…1	-
rx_min**	minimal R/X-ratio to calculate internal impedance of ext_grid for short circuit calculations	float	0…1	-
r0x0_max***	maximal R/X-ratio to calculate Zero sequence internal impedance of ext_grid	float	0…1	-
x0x_max***	maximal X0/X-ratio to calculate Zero sequence internal impedance of ext_grid	float	0…1	-

*necessary for executing a power flow calculation

**short-circuit calculation parameter

***single phase short circuit/Three Phase load flow calculation parameters

The exact model and result parameters (for pandapower) are defined in the link below: https://pandapower.readthedocs.io/en/latest/elements/ext_grid.html