Buildings.Electrical.DC.Sources

Package with models for DC sources

Information

This package contains models that represent different types of DC sources.

Extends from Modelica.Icons.SourcesPackage (Icon for packages containing sources).

Package Content

Name	Description
ConstantVoltage	Model of a constant DC voltage source
PVSimple	Simple PV model
PVSimpleOriented	Simple PV model with orientation
VoltageSource	Model of a generoic DC voltage source
WindTurbine	Wind turbine with power output based on table as a function of wind speed
Examples	Package with example models
BaseClasses	Package with base classes for DC sources

Buildings.Electrical.DC.Sources.ConstantVoltage

Model of a constant DC voltage source

Information

This model represents a simple DC voltage source with constant voltage.

Extends from Buildings.Electrical.Interfaces.Source (Partial model of a generic source.).

Parameters

Connectors

Modelica definition

Buildings.Electrical.DC.Sources.PVSimple

Simple PV model

Information

Model of a simple photovoltaic array.

This model computes the power as

P=A   f_act   η   G

where A is the panel area, f_act is the fraction of the aperture area, η is the panel efficiency and G is the total solar irradiation. This power is equal to P = v   i, where v is the voltage across the panel and i is the current that flows through the panel.

To avoid a large voltage drop the panel electric connector, it is recommended to use this model together with a model that prescribes the voltage. See Buildings.Electrical.DC.Sources.Examples.PVSimple.

Note: This model takes as input the total solar irradiation on the panel. This has to be computed converting the incoming radiation to take tilt and azimuth into account.

Extends from Buildings.Electrical.Interfaces.PartialPV (Base model for a PV system).

Parameters

Connectors

Modelica definition

Buildings.Electrical.DC.Sources.PVSimpleOriented

Simple PV model with orientation

Information

Model of a simple photovoltaic array.

This model computes the power as

P=A   f_act   η   G

where A is the panel area, f_act is the fraction of the aperture area, η is the panel efficiency and G is the total solar irradiation, which is the sum of direct and diffuse irradiation. The model takes into account the location and the orientation of the PV panel, specified by the surface tilt, latitude and azimuth.

This power is equal to P = v   i, where v is the voltage across the panel and i is the current that flows through the panel.

To avoid a large voltage drop the panel electric connector, it is recommended to use this model together with a model that prescribes the voltage. See Buildings.Electrical.DC.Sources.Examples.PVSimpleOriented.

This model takes as an input the direct and diffuse solar radiation from the weather data bus.

Extends from Buildings.Electrical.Interfaces.PartialPVOriented (Base model of a PV system with orientation).

Parameters

Connectors

Modelica definition

Buildings.Electrical.DC.Sources.VoltageSource

Model of a generoic DC voltage source

Information

This model represents a simple DC voltage source with variable voltage.

Extends from Buildings.Electrical.Interfaces.VariableVoltageSource (Partial model of a generic variable voltage source.).

Parameters

Connectors

Modelica definition

Buildings.Electrical.DC.Sources.WindTurbine

Wind turbine with power output based on table as a function of wind speed

Information

Model of a wind turbine whose power is computed as a function of wind-speed as defined in a table.

Input to the model is the local wind speed. The model requires the specification of a table that maps wind speed in meters per second to generated power P_t in Watts. The model has a parameter called scale with a default value of one that can be used to scale the power generated by the wind turbine. The generated DC electrical power is

P = P_t scale = v i,

where v is the voltage and i is the current. For example, the following specification (with default scale=1) of a wind turbine

  WindTurbine_Table tur(
    table=[3.5, 0;
           5.5,   100;
           12, 900;
           14, 1000;
           25, 1000]) "Wind turbine";

yields the performance shown below. In this example, the cut-in wind speed is 3.5 meters per second, and the cut-out wind speed is 25 meters per second, as entered by the first and last entry of the wind speed column. Below and above these wind speeds, the generated power is zero.

Extends from Buildings.Electrical.Interfaces.PartialWindTurbine (Partial model of a wind turbine with power output based on table as a function of wind speed).

Parameters

Connectors

Modelica definition