ePHASORSIM supports CYME’s 2-winding transformer model.
Transformer Data
Entry | Description | Acceptable values |
Section ID | Transformer identifier | The section ID may not contain blank spaces. |
|---|---|---|
Phase | Phase present in the network | At least one phase should be selected. |
Primary (in ‘General’ sub-box of the ‘Settings’ box) | Primary side of the transformer | ‘At From Node’ or ‘At To Node’ |
Nominal Rating (in ‘Nominal Data’ box of 'General' tab) | Rating of the transformer in kVA | Any value |
Primary Voltage (in ‘Nominal Data’ box of ‘General’ tab) | Primary side rated line-to-line voltage in kV | |
Secondary Voltage (in ‘Nominal Data’ box in ‘General’ tab) | Primary side rated line-to-line voltage in kV | |
Z1 (in ‘Sequence Impedances’ box of ‘General’ tab) | Z1 Impedance in percent on transformer kVA base | |
Z0 (in ‘Sequence Impedances’ box of ‘General’ tab) | Z0 Impedance in percent on transformer kVA base | |
X1/R1 (in ‘Sequence Impedances’ box of ‘General’ tab) | X1 to R1 ratio | |
X0/R0 (in ‘Sequence Impedances’ box of ‘General’ tab) | X0 to R0 ratio | |
Primary (in ‘Configuration’ box) | Primary side connection of the transformer | ‘Star to ground’ or ‘delta’ |
Secondary (in ‘Configuration’ box) | Secondary side connection of the transformer | |
Phase shift | Phase shift of the transformer | Four type of connection (**) |
Final tap(*) | Tap position of the transformer | Any value |
* When a Load Tap Changer is defined for the transformer, This value is read from ‘Final Tap’ in ‘Load Tap changer’ box. However, if no tap changer is defined, a default zero value is given.
** In the current version of ePHASORSIM, 4 types of the transformer configuration are supported. They are ‘DD0’, ‘YGyg0’, ‘Dyg1’, ‘YGD1’.
Note: To access different pins for a transformer imported from CYME please look for multiphase transformer in Table 3.