Buildings.Electrical.AC.OnePhase.Conversion

Package with models for AC/AC and AC/DC conversion

Information

This package contains models for AC/AC and AC/DC conversion.

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

Package Content

Name	Description
ACACConverter	AC AC converter single phase systems
ACACTransformer	AC AC transformer simplified equivalent circuit
ACACTransformerFull	AC AC transformer with detailed equivalent circuit
ACDCConverter	AC DC converter
Examples	Package with example models

Buildings.Electrical.AC.OnePhase.Conversion.ACACConverter

AC AC converter single phase systems

Information

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

V₂ = conversionFactor V₁

where V₁ and V₂ are the RMS voltages at the primary and secondary sides of the transformer, i.e., the 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

P_loss = (1-η) P_tr,

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

Note:

This model is derived from Modelica.Electrical.QuasiStationary.SinglePhase.Utilities.IdealACDCConverter.

Extends from Buildings.Electrical.Icons.RefAngleConversion (Icon that represents if the angle symble should be displayed or not), Buildings.Electrical.Interfaces.PartialConversion (Model representing a generic two port system for conversion).

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformer

AC AC transformer simplified equivalent circuit

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

• 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 the inductance.

Extends from Buildings.Electrical.Icons.RefAngleConversion (Icon that represents if the angle symble should be displayed or not), Buildings.Electrical.Interfaces.PartialConversion (Model representing a generic two port system for conversion).

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Conversion.ACACTransformerFull

AC AC transformer with detailed equivalent circuit

Information

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

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

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,
• f - frequency,
• R_1, L_1 - resistance and inductance at primary side (per unit),
• R_2, L_2 - resistance and inductance at secondary side (per unit), and
• R_m, L_m - resistance and inductance for magnetization effects (per unit).

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

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

Extends from Buildings.Electrical.Icons.RefAngleConversion (Icon that represents if the angle symble should be displayed or not), Buildings.Electrical.Interfaces.PartialConversion (Model representing a generic two port system for conversion).

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Conversion.ACDCConverter

AC DC converter

Information

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

V_DC = conversionFactor V_AC,

where V_DC is the voltage of the DC circuit and V_AC is the RMS voltage at the primary side of the transformer.

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

P_loss = (1-η) P_tr

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

Note:

This model is derived from Modelica.Electrical.QuasiStationary.SinglePhase.Utilities.IdealACDCConverter.

Extends from Buildings.Electrical.Interfaces.PartialConversion (Model representing a generic two port system for conversion).

Parameters

Connectors

Modelica definition