Properties
The properties of the GICTransformer model, in order, are:
|
Basefreq |
Inherited Property for all PCElements. Base frequency for specification of reactance value. |
|
busH |
Name of bus High-side (H) bus. Node order definitions optional. |
|
busNH |
Name of Neutral bus for H, or first, winding. Defaults to all phases connected to H-side bus, node 0, if not specified and transformer type is either GSU or YY. (Shunt Wye Connection to ground reference)For Auto, this is automatically set to the X bus. |
|
busNX |
Name of Neutral bus for X, or Second, winding. Defaults to all phases connected to X-side bus, node 0, if not specified. (Shunt Wye Connection to ground reference). |
|
busX |
Name of bus Low-side (X) bus. Node order definitions optional. |
|
emergamps |
Maximum current. Typically not specified in GIC calculations. |
|
enabled |
{Yes|No or True|False} Indicates whether this element is enabled. Default is Yes/True. |
|
phases |
Number of phases. Default is 3. |
|
R1 |
Resistance, each phase, ohms for H winding, (Series winding, if Auto). Default is 0.0001. |
|
R2 |
Resistance, each phase, ohms for X winding, (Common winding, if Auto). Default is 0.0001. |
|
Type |
Type of transformer: {GSU* | Auto | YY}. Default is GSU. |
|
MVA |
Optional. MVA Rating assumed Transformer. Default is 100. Used for computing vars due to GIC and winding resistances if kV and MVA ratings are specified. |
|
KVLL1 |
Optional. kV LL rating for H winding (winding 1). Default is 500. Required if you are going to export vars for power flow analysis or enter winding resistances in percent. |
|
KVLL2 |
Optional. kV LL rating for X winding (winding 2). Default is 138. Required if you are going to export vars for power flow analysis or enter winding resistances in percent.. |
|
%R1 |
Optional. Percent Resistance, each phase, for H winding (1), (Series winding, if Auto). Default is 0.2. Alternative way to enter R1 value. It is the actual resistances in ohmns that matter. MVA and kV should be specified. |
|
%R2 |
Optional. Percent Resistance, each phase, for X winding (2), (Common winding, if Auto). Default is 0.2. Alternative way to enter R2 value. It is the actual resistances in ohms that matter. MVA and kV should be specified. |
|
K |
Mvar K factor. Default way to convert GIC Amps in H winding (winding 1) to Mvar. Default is 2.2. Commonly-used simple multiplier for estimating Mvar losses for power flow analysis. Mutually exclusive with using the VarCurve property and pu curves.If you specify this (default), VarCurve is ignored. |
|
VarCurve |
Optional. XYCurve object name. Curve is expected as TOTAL pu vars vs pu GIC amps/phase. Vars are in pu of the MVA property. No Default value. Required only if you are going to export vars for power flow analysis using curves. See K property. |
|
like |
Make like another object, e.g. New GICTransformer.T2 like=T1 ... |
The following properties are inherited from the Power Delivery element class, but are ignored for GIC calculations
|
normamps |
Normal rated current. Typically not specified in GIC calculations. |
|
emergamps |
Maximum current. Typically not specified in GIC calculations. |
|
pctperm |
Percent of failures that become permanent. Typically not specified in GIC calculations. |
|
repair |
Hours to repair. Typically not specified in GIC calculations. |