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

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