: Public Class
Created: |
29/04/2013 11:26:53 |
Modified: |
17/02/2017 11:16:01 |
|
Project: |
|
Author: |
J87773 |
Version: |
1.0 |
Phase: |
1.0 |
Status: |
Proposed |
Complexity: |
Easy |
Difficulty: |
|
Priority: |
|
Multiplicity: |
|
Advanced: |
|
UUID: |
{52234EA7-B754-42a8-B5D1-7A138CE08985} |
Appears In: |
CDPSM classes, Transformers |
An electrical device consisting of two or more coupled windings, with or without a magnetic core, for introducing mutual coupling between electric circuits. Transformers can be used to control voltage and phase shift (active power flow).<br/>A power transformer may be composed of separate transformer tanks that need not be identical.<br/>The same power transformer can be modelled in two ways, namely with and without tanks:<br/><ol>
<li>The power transformer that uses power transformer ends directly (without tanks) is suitable for balanced three-phase models. This is typical for transmission and sub-transmission network modelling. Such a transformer will require one power transformer end for each physical winding. There must be a one-to-one association between PowerTransformerEnd and Core::Terminal.</li> <li>The power transformer that uses transformer tanks is suitable for an unbalanced transformer, a balanced transformer within a single tank, or a balanced transformer made up of three tanks. This is typical for distribution network modelling and the only choice when modelling an unbalanced transformer, or a transformer that has more than three windings. Power transformer modelled with tanks will require for each tank, one transformer tank end per physical winding in the tank. There may be one, two, or three phases in the transformer tank end. Examples: 3 phases for 3-phase delta or wye connected windings, 2 for one phase-to-phase winding, and 1 for a phase-to-neutral or phase-to-ground winding. With 1 or 2 phases, more than one transformer tank end may be associated to the same 3-phase Core::Terminal instance, while with 3 phases there should be a one-to-one association.</li></ol>
This power transformer model is flexible in order to support different kinds of data exchange requirements. There are 5 possible ways to combine available classes and their attributes:<br/><ol>
<li>Instance parameters - Use the r, x, r0, x0, b, b0, g, and g0 attributes on PowerTransformerEnd and ignore related TransformerStarImpedance, TransformerMeshImpedance, or TransformerCoreAdmittance. This option assumes a star connection of the series impedances. It is suitable for typical transmission, balanced three-phase transformer models, for transformers with 2 or three windings.</li> <li>Star instance parameters by association - Instead of the r, x, r0, x0, b, b0, g, and g0 attributes, use associations to TransformerStarImpedance and TransformerCoreAdmitance. This option is suitable in same scenarios as option 1, but when catalogue data is available for transformers.</li> <li>Mesh instance parameters by association: Instead of the r, x, r0, x0, b, b0, g, and g0 attributes, use associations to TransformerMeshImpedance and TransformerCoreAdmittance. This option supports transformers with more than three windings.</li> <li>Catalog mesh parameters by association - Instead of attributes r, x, r0, x0, b, b0, g, and g0 and associations to TransformerStarImpedance, TransformerMeshImpedance, or TransformerCoreAdmittance, use the association to TransformerEndInfo. The TransformerEnd.endNumber should match the corresponding TransformerEndInfo.endNumber, following the IEC standard convention of numbering from the highest voltage ends to the lowest, starting at 1. This matching supports higher-level use of a catalog, through just one association between TransformerTank and TransformerTankInfo, with simpler exchanges and incremental updates. The associated TransformerEndInfo will have associations to TransformerMeshImpedance and TransformerCoreAdmittance. This option supports unbalanced transformer, with more than three windings and is suitable whenever the transformer test data has been converted to an electrical model.</li> <li>Catalog test data by association - This is the same as option 4, except TransformerEndInfo will have associations to AssetModels::TransformerTest decendents, instead of to TransformerMeshImpedance and TransformerCoreAdmittance. This option is suitable when the test data is available, and the receiving application is able to interpret the test data.</li></ol>
Every profile should specify which one or more of these options are supported.<br/><br/>
- Attributes
- Associations To
- Tagged Values
- Other Links
Attribute |
Public String vectorGroup
|
Details:
Alias: |
|
Initial: |
|
Stereotype: |
|
Ordered: |
|
Range: |
Range:0 to 1 |
Transient: |
False |
Derived: |
False |
IsID: |
False |
GUIDBasedOn={5A4A0AC2-AE76-4849-9563-015909DD9F2F}
Notes:
|
Vector group of the transformer for protective relaying, e.g., Dyn1. For unbalanced transformers, this may not be simply determined from the constituent winding connections and phase angle dispacements.<br/><br/>The vectorGroup string consists of the following components in the order listed: high voltage winding connection, mid voltage winding connection (for three winding transformers), phase displacement clock number from 0 to 11, low voltage winding connection <br/>phase displacement clock number from 0 to 11. The winding connections are D (delta), Y (wye), YN (wye with neutral), Z (zigzag), ZN (zigzag with neutral), A (auto transformer). Upper case means the high voltage, lower case mid or low. The high voltage winding always has clock postion 0 and is not included in the vector group string. Some examples: YNy0 (two winding wye to wye with no phase displacement), YNd11 (two winding wye to delta with 330 degrees phase displacement), YNyn0d5 (three winding transformer wye with neutral high voltgage, wye with neutral mid voltgage and no phase displacement, delta low voltage with 150 degrees displacement).<br/><br/>Phase displacement is defined as the angular difference between the phasors representing the voltages between the neutral point (real or imaginary) and the corresponding terminals of two windings, a positive sequence voltage system being applied to the high-voltage terminals, following each other in alphabetical sequence if they are lettered, or in numerical sequence if they are numbered: the phasors are assumed to rotate in a counter-clockwise sense.<br/><br/>
|
|
Element |
Source Role |
Target Role |
PowerTransformerEnd
Class
|
Name: PowerTransformer
The power transformer of this power transformer end.
|
Name: PowerTransformerEnd
The ends of this power transformer.
|
 Details:
|
Tag |
Value |
GUIDBasedOn |
{3D50627C-324C-4e9d-AB5C-592E0A1E0AFE} |
 Details:
|
isParentOf |
{98600D44-B4AA-45d6-94A5-265A79024C6D} |
 Details:
|