Transformer

List of input parameters

Parameter
Description
Type
Value range
OpenDSS equivalent

name

a custom name

string

-

name

sn_mva*

rated apparent power in MVA

float

> 0

kvas

vn_hv_kv*

rated voltage on high voltage side in kV

float

> 0

kVs

vn_lv_kv*

rated voltage on low voltage side in kV

float

> 0

kVs

vkr_percent*

real part of relative short-circuit voltage in %

float

≥ 0

-

vk_percent*

relative short-circuit voltage in %

float

≥ 0

-

pfe_kw*

iron losses in kW

float

≥ 0

-

i0_percent*

open loop losses in percent of rated current in %"

float

≥ 0

-

shift_degree*

angle shift over the transformer

float

-

vector_group***

Vector group of the transformer; HV side is Uppercase letters and LV side is lower case

string

‘Dyn’,’Yyn’,’Yzn’,’YNyn’

-

vk0_percent***

zero sequence relative short-circuit voltage in %

float

≥ 0

-

vkr0_percent***

real part of zero sequence relative short-circuit voltage in %

float

≥ 0

-

mag0_percent***

zero sequence magnetizing impedance in %

float

≥ 0

-

si0_hv_partial***

distribution of zero sequence leakage impedances for HV sid

float

≥ 0

-

tap_pos

current tap position of the transformer

integer

-

tap_max

maximal allowed tap position

integer

-

tap_min

minimal allowed tap position

integer

-

tap_step_percent

tap step size for voltage magnitude in %

float

≥ 0

-

tap_step_degree

tap step size for voltage angle in degree

float

≥ 0

-

tap_phase_shifter

whether the transformer is an ideal phase shifter

bool

-

*necessary for executing a balanced power flow calculation

***necessary for executing a three phase power flow / single phase short circuit

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

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