modelACACTransformerStepUpYD

AC AC transformer simplified equivalent circuit (YD step up)

Extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterStepUpYD (Model of a transformer with Y connection primary side and D connection secondary side (Voltage step up)).

Information

This is a simplified equivalent transformer model with Y-Delta connection (voltage step up). The model accounts for winding Joule losses and leakage reactances that are represented by a series of a resistance R and an inductance L. The resistance and the inductance represent the effects of the secondary and primary side of the transformer.

The model is parameterized using the following parameters

Vhigh - RMS voltage at primary side,
Vlow - RMS voltage at secondary side,
VAbase - apparent nominal power of the transformer,
XoverR - ratio between reactance and resistance, and
Zperc - the short circuit impedance.

Given the nominal conditions, the model computes the values of the resistance and inductance.

Configuration:

The image below describes the connection of the windings.

Note:

This model reuses models from Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer.

See Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterStepUpYD for details on the connections.

Parameters

Type	Name	Default	Description
Modelica.Units.SI.Voltage	VHigh		Rms voltage on side 1 of the transformer (primary side)
Modelica.Units.SI.Voltage	VLow		Rms voltage on side 2 of the transformer (secondary side)
Modelica.Units.SI.ApparentPower	VABase		Nominal power of the transformer
Real	XoverR		Ratio between the complex and real components of the impedance (XL/R)
Real	Zperc		Short circuit impedance
Ground › side 1
Boolean	ground_1	false	Connect side 1 of transformer to ground
Ground › side 2
Boolean	ground_2	true	Connect side 2 of transformer to ground

Connectors

Type	Name	Default	Description
Interfaces.Terminal_n	terminal_n (from PartialConverter)		Electrical connector side N
Interfaces.Terminal_p	terminal_p (from PartialConverter)		Electrical connector side P

Components

Type	Name	Description
Buildings.Electrical.Interfaces.PartialConversion	conv1 (from PartialConverter)
Buildings.Electrical.Interfaces.PartialConversion	conv2 (from PartialConverter)
Buildings.Electrical.Interfaces.PartialConversion	conv3 (from PartialConverter)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Interfaces.WyeToWyeGround	wye_to_wyeg (from PartialConverterStepUpYD)	Wye to wye grounded connection
Buildings.Electrical.AC.ThreePhasesUnbalanced.Interfaces.WyeToDelta	delta_to_wye (from PartialConverterStepUpYD)	Delta to wye connection

Revisions

October 3, 2014, by Marco Bonvini:
Revised documentation.
June 6, 2014, by Marco Bonvini:
First implementation.