Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion

Package with converter and transformer models for three-phase unbalanced AC systems

Information

This package contains models that represent different types of three phases unbalanced AC/AC transformers and AC/DC converters.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name Description
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACConverter ACACConverter AC AC converter single phase systems (YY)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformer ACACTransformer AC AC transformer simplified equivalent circuit (YY)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerDD ACACTransformerDD AC AC transformer simplified equivalent circuit (DD)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerFull ACACTransformerFull AC AC transformer detailed equivalent circuit (YY)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownDY ACACTransformerStepDownDY AC AC transformer simplified equivalent circuit (DY step down)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownYD ACACTransformerStepDownYD AC AC transformer simplified equivalent circuit (YD step down)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpDY ACACTransformerStepUpDY AC AC transformer simplified equivalent circuit (DY step up)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpYD ACACTransformerStepUpYD AC AC transformer simplified equivalent circuit (YD step up)
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples Examples Package with example models
Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses BaseClasses Package with base class models

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACConverter Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACConverter

AC AC converter single phase systems (YY)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACConverter

Information

This is an AC AC converter, based on a power balance between both circuit sides. The parameter conversionFactor defines the ratio between the RMS voltages

V2 = conversionFactor * V1

where V1 and V2 are the RMS voltages at the primary and secondary sides of the transformer (connector N and P respectively).

The loss of the converter is proportional to the power transmitted. The parameter eta is the efficiency of the transfer. The loss is computed as

Ploss = (1-η) Ptr

where Ptr is the power transmitted. The model is bi-directional and the power can flow from both the primary to the secondary and vice-versa. Furthermore, reactive power on both side are set to 0.

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

Extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterYY (Model of a transformer with Y connection primary side and Y connection secondary side).

Parameters

TypeNameDefaultDescription
RealconversionFactor Ratio of QS rms voltage on side 2 / QS rms voltage on side 1
Efficiencyetaeta(max=1)Converter efficiency, pLoss = (1-eta) * Ptr [1]
Ground
side 1
Booleanground_1falseConnect side 1 of converter to ground
side 2
Booleanground_2trueConnect side 2 of converter to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACConverter "AC AC converter single phase systems (YY)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterYY ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACConverter conv1( conversionFactor=conversionFactor, eta=eta, ground_1=ground_1, ground_2=ground_2), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACConverter conv2( conversionFactor=conversionFactor, eta=eta, ground_1=ground_1, ground_2=ground_2), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACConverter conv3( conversionFactor=conversionFactor, eta=eta, ground_1=ground_1, ground_2=ground_2)); parameter Real conversionFactor "Ratio of QS rms voltage on side 2 / QS rms voltage on side 1"; parameter Modelica.SIunits.Efficiency eta(max=1) "Converter efficiency, pLoss = (1-eta) * Ptr"; parameter Boolean ground_1 = false "Connect side 1 of converter to ground"; parameter Boolean ground_2 = true "Connect side 2 of converter to ground"; end ACACConverter;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformer Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformer

AC AC transformer simplified equivalent circuit (YY)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformer

Information

This is a simplified equivalent transformer model. 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 both the effects of the secondary and primary side of the transformer.

The model is parameterized using the following parameters

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

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

Extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterYY (Model of a transformer with Y connection primary side and Y connection secondary side).

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
RealXoverR Ratio between the complex and real components of the impedance (XL/R)
RealZperc Short circuit impedance
Ground
side 1
Booleanground_1falseConnect side 1 of transformer to ground
side 2
Booleanground_2trueConnect side 2 of transformer to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformer "AC AC transformer simplified equivalent circuit (YY)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterYY ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv1( VHigh=VHigh/sqrt(3), VLow=VLow/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, phi_1=0), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv2( VHigh=VHigh/sqrt(3), VLow=VLow/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, phi_1=-2.0943951023932), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv3( VHigh=VHigh/sqrt(3), VLow=VLow/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, phi_1=2.0943951023932)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Real XoverR "Ratio between the complex and real components of the impedance (XL/R)"; parameter Real Zperc "Short circuit impedance"; parameter Boolean ground_1 = false "Connect side 1 of transformer to ground"; parameter Boolean ground_2 = true "Connect side 2 of transformer to ground"; equation end ACACTransformer;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerDD Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerDD

AC AC transformer simplified equivalent circuit (DD)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerDD

Information

This is a simplified equivalent transformer model with Delta-Delta connection. 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

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

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

Extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterDD (Model of a transformer with D connection primary side and D connection secondary side).

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
RealXoverR Ratio between the complex and real components of the impedance (XL/R)
RealZperc Short circuit impedance
Ground
side 1
Booleanground_1falseConnect side 1 of transformer to ground
side 2
Booleanground_2trueConnect side 2 of transformer to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformerDD "AC AC transformer simplified equivalent circuit (DD)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterDD ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv1( XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VHigh=VHigh, VLow=VLow, phi_1=0.5235987755983), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv2( XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VHigh=VHigh, VLow=VLow, phi_1=-1.5707963267949), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv3( XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VHigh=VHigh, VLow=VLow, phi_1=2.6179938779915)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Real XoverR "Ratio between the complex and real components of the impedance (XL/R)"; parameter Real Zperc "Short circuit impedance"; parameter Boolean ground_1 = false "Connect side 1 of transformer to ground"; parameter Boolean ground_2 = true "Connect side 2 of transformer to ground"; equation end ACACTransformerDD;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerFull Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerFull

AC AC transformer detailed equivalent circuit (YY)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerFull

Information

This is a detailed transformer model that takes into accounts the winding Joule losses, and the leakage reactances on the primary and secondary side. The model also takes into account the core or iron losses and the losses due to magnetization effects.

The losses are represented by a series of resistances R1, R2, Rm and inductances L1, L2, and Lm.

The model is parameterized using the following parameters

Given the nominal conditions, the model computes the values of the nominal impedances at the primary and secondary side. Given these values, the per unit values are transformed into the actual values of the resistances and inductancs.

The magnetization losses can be enabled or disabled using the boolean flag magEffects.

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

Extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterYY (Model of a transformer with Y connection primary side and Y connection secondary side).

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
Frequencyff(start=60)Nominal frequency [Hz]
PerUnitR1R1(min=0)Resistance on side 1 of the transformer (pu) [1]
PerUnitL1L1(min=0)Inductance on side 1 of the transformer (pu) [1]
PerUnitR2R2(min=0)Resistance on side 2 of the transformer (pu) [1]
PerUnitL2L2(min=0)Inductance on side 2 of the transformer (pu) [1]
Magnetization
BooleanmagEffectsfalseIf =true introduce magnetization effects
PerUnitRmRm(min=0, start=0)Magnetization resistance (pu) [1]
PerUnitLmLm(min=0, start=0)Magnetization inductance (pu) [1]
Ground
side 1
Booleanground_1falseConnect side 1 of converter to ground
side 2
Booleanground_2trueConnect side 2 of converter to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformerFull "AC AC transformer detailed equivalent circuit (YY)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterYY ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformerFull conv1( VHigh=VHigh/sqrt(3), VLow=VLow/sqrt(3), f = f, VABase=VABase, R1=R1,L1=L1,R2=R2,L2=L2, magEffects=magEffects, Rm=Rm,Lm=Lm, ground_1=ground_1, ground_2=ground_2), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformerFull conv2( VHigh=VHigh/sqrt(3), VLow=VLow/sqrt(3), f = f, VABase=VABase, R1=R1,L1=L1,R2=R2,L2=L2, magEffects=magEffects, Rm=Rm,Lm=Lm, ground_1=ground_1, ground_2=ground_2), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformerFull conv3( VHigh=VHigh/sqrt(3), VLow=VLow/sqrt(3), f = f, VABase=VABase, R1=R1,L1=L1,R2=R2,L2=L2, magEffects=magEffects, Rm=Rm,Lm=Lm, ground_1=ground_1, ground_2=ground_2)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Modelica.SIunits.Frequency f(start=60) "Nominal frequency"; parameter Buildings.Electrical.Types.PerUnit R1(min=0) "Resistance on side 1 of the transformer (pu)"; parameter Buildings.Electrical.Types.PerUnit L1(min=0) "Inductance on side 1 of the transformer (pu)"; parameter Buildings.Electrical.Types.PerUnit R2(min=0) "Resistance on side 2 of the transformer (pu)"; parameter Buildings.Electrical.Types.PerUnit L2(min=0) "Inductance on side 2 of the transformer (pu)"; parameter Boolean magEffects = false "If =true introduce magnetization effects"; parameter Buildings.Electrical.Types.PerUnit Rm(min=0,start=0) "Magnetization resistance (pu)"; parameter Buildings.Electrical.Types.PerUnit Lm(min=0,start=0) "Magnetization inductance (pu)"; parameter Boolean ground_1 = false "Connect side 1 of converter to ground"; parameter Boolean ground_2 = true "Connect side 2 of converter to ground"; end ACACTransformerFull;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownDY Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownDY

AC AC transformer simplified equivalent circuit (DY step down)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownDY

Information

This is a simplified equivalent transformer model with Y-Delta connection (voltage step down). 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

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

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

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

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
RealXoverR Ratio between the complex and real components of the impedance (XL/R)
RealZperc Short circuit impedance
Ground
side 1
Booleanground_1falseConnect side 1 of transformer to ground
side 2
Booleanground_2trueConnect side 2 of transformer to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformerStepDownDY "AC AC transformer simplified equivalent circuit (DY step down)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterStepDownDY ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv1( VHigh=VHigh, XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=-VLow/sqrt(3), phi_1=2.6179938779915), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv2( VHigh=VHigh, XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=-VLow/sqrt(3), phi_1=0.5235987755983), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv3( VHigh=VHigh, XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=-VLow/sqrt(3), phi_1=-1.5707963267949)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Real XoverR "Ratio between the complex and real components of the impedance (XL/R)"; parameter Real Zperc "Short circuit impedance"; parameter Boolean ground_1 = false "Connect side 1 of transformer to ground"; parameter Boolean ground_2 = true "Connect side 2 of transformer to ground"; equation end ACACTransformerStepDownDY;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownYD Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownYD

AC AC transformer simplified equivalent circuit (YD step down)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepDownYD

Information

This is a simplified equivalent transformer model with Y-Delta connection (voltage step down). 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

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

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

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

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
RealXoverR Ratio between the complex and real components of the impedance (XL/R)
RealZperc Short circuit impedance
Ground
side 1
Booleanground_1falseConnect side 1 of transformer to ground
side 2
Booleanground_2trueConnect side 2 of transformer to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformerStepDownYD "AC AC transformer simplified equivalent circuit (YD step down)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterStepDownYD ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv1( VHigh=VHigh/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=VLow, phi_1=0), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv2( VHigh=VHigh/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=VLow, phi_1=-2.0943951023932), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv3( VHigh=VHigh/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=VLow, phi_1=2.0943951023932)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Real XoverR "Ratio between the complex and real components of the impedance (XL/R)"; parameter Real Zperc "Short circuit impedance"; parameter Boolean ground_1 = false "Connect side 1 of transformer to ground"; parameter Boolean ground_2 = true "Connect side 2 of transformer to ground"; equation end ACACTransformerStepDownYD;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpDY Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpDY

AC AC transformer simplified equivalent circuit (DY step up)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpDY

Information

This is a simplified equivalent transformer model with Delta-Y 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

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

Configuration:

The image below describes the connection of the windings.

image

Note:

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

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

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

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
RealXoverR Ratio between the complex and real components of the impedance (XL/R)
RealZperc Short circuit impedance
Ground
side 1
Booleanground_1falseConnect side 1 of transformer to ground
side 2
Booleanground_2trueConnect side 2 of transformer to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformerStepUpDY "AC AC transformer simplified equivalent circuit (DY step up)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterStepUpDY ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv1( VHigh=VHigh, XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=VLow/sqrt(3), phi_1=0.5235987755983), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv2( VHigh=VHigh, XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=VLow/sqrt(3), phi_1=-1.5707963267949), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv3( VHigh=VHigh, XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=VLow/sqrt(3), phi_1=2.6179938779915)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Real XoverR "Ratio between the complex and real components of the impedance (XL/R)"; parameter Real Zperc "Short circuit impedance"; parameter Boolean ground_1 = false "Connect side 1 of transformer to ground"; parameter Boolean ground_2 = true "Connect side 2 of transformer to ground"; equation end ACACTransformerStepUpDY;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpYD Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpYD

AC AC transformer simplified equivalent circuit (YD step up)

Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.ACACTransformerStepUpYD

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

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

Configuration:

The image below describes the connection of the windings.

image

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.

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)).

Parameters

TypeNameDefaultDescription
VoltageVHigh Rms voltage on side 1 of the transformer (primary side) [V]
VoltageVLow Rms voltage on side 2 of the transformer (secondary side) [V]
ApparentPowerVABase Nominal power of the transformer [VA]
RealXoverR Ratio between the complex and real components of the impedance (XL/R)
RealZperc Short circuit impedance
Ground
side 1
Booleanground_1falseConnect side 1 of transformer to ground
side 2
Booleanground_2trueConnect side 2 of transformer to ground

Connectors

TypeNameDescription
Terminal_nterminal_nElectrical connector side N
Terminal_pterminal_pElectrical connector side P

Modelica definition

model ACACTransformerStepUpYD "AC AC transformer simplified equivalent circuit (YD step up)" extends Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.BaseClasses.PartialConverterStepUpYD ( redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv1( VHigh=VHigh/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=-VLow, phi_1=0), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv2( VHigh=VHigh/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=-VLow, phi_1=-2.0943951023932), redeclare Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer conv3( VHigh=VHigh/sqrt(3), XoverR=XoverR, Zperc=Zperc, ground_1=ground_1, ground_2=ground_2, VABase=VABase/3, VLow=-VLow, phi_1=2.0943951023932)); parameter Modelica.SIunits.Voltage VHigh "Rms voltage on side 1 of the transformer (primary side)"; parameter Modelica.SIunits.Voltage VLow "Rms voltage on side 2 of the transformer (secondary side)"; parameter Modelica.SIunits.ApparentPower VABase "Nominal power of the transformer"; parameter Real XoverR "Ratio between the complex and real components of the impedance (XL/R)"; parameter Real Zperc "Short circuit impedance"; parameter Boolean ground_1 = false "Connect side 1 of transformer to ground"; parameter Boolean ground_2 = true "Connect side 2 of transformer to ground"; equation end ACACTransformerStepUpYD;