Buildings.Electrical.AC.OnePhase.Sources

Package with sources models for one phase AC systems

Information

This package contains models of AC sources.

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

Package Content

Name	Description
FixedVoltage	Fixed single phase AC voltage source
Generator	Model of a generator
Grid	Electrical grid
PVSimple	Simple PV model
PVSimpleOriented	Simple PV model with orientation
WindTurbine	Simple wind turbine model
Examples	Package with example models

Buildings.Electrical.AC.OnePhase.Sources.FixedVoltage

Fixed single phase AC voltage source

Information

This is a constant voltage source. The complex voltage is specified by the RMS voltage and the phase shift.

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

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Sources.Generator

Model of a generator

Information

Model of a generator that produces real power P with a given phase shift phiGen.

This model must be used with Buildings.Electrical.AC.Sources.Grid or with a voltage source from the package Modelica.Electrical.QuasiStationary.SinglePhase.Sources. Otherwise, there will be no equation that defines the phase angle of the voltage.

The boolean flags potentialReference and definiteReference allows to select the phase angle of the generator as reference for the models connected to it. More info about these flags are available in Buildings.Electrical.AC.UsersGuide.

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

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Sources.Grid

Electrical grid

Information

Model that can be used to represent the electrical grid supply.

The model has an output connector named P that contains information about the power supplied by the grid to the network. The convention is that P.real is positive if real power is consumed from the grid, and negative if it is fed into the grid.

The parameter V is the root means square of the voltage. In US households, this is 120 Volts at 60 Hz, in Europe it is 230 Volts at 50 Hz.

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Sources.PVSimple

Simple PV model

Information

Model of a simple photovoltaic array.

The electrical connector is an AC interface.

This model computes the active power as

P=A   f_act   η   G   η_DCAC,

where A is the panel area, f_act is the fraction of the aperture area, η is the panel efficiency, G is the total solar irradiation, which is the sum of direct and diffuse irradiation, and η_DCAC is the efficiency of the conversion between DC and AC.

This active power is equal to P, while the reactive power is equal to Q = P   tan(acos(pf)) where pf is the power factor.

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. For a model that implements this conversion, use Buildings.Electrical.AC.OnePhase.Sources.PVSimpleOriented.

Extends from Buildings.Electrical.Interfaces.PartialAcDcParameters (Partial model that contains basic parameters for a DC/AC conversion system), Buildings.Electrical.Interfaces.PartialPV (Base model for a PV system).

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Sources.PVSimpleOriented

Simple PV model with orientation

Information

Model of a simple photovoltaic array.

This model takes as an input the direct and diffuse solar radiation from the weather bus. The electrical connector is an AC one phase interface.

This model computes the active power as

P=A   f_act   η   G   η_DCAC,

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

This active power is equal to P, while the reactive power is equal to Q = P   tan(acos(pf)), where pf is the power factor.

Extends from Buildings.Electrical.Interfaces.PartialAcDcParameters (Partial model that contains basic parameters for a DC/AC conversion system), Buildings.Electrical.Interfaces.PartialPVOriented (Base model of a PV system with orientation).

Parameters

Connectors

Modelica definition

Buildings.Electrical.AC.OnePhase.Sources.WindTurbine

Simple wind turbine model

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 active electrical power is

P = P_t scale η_DCAC

where η_DCAC is the efficiency of the conversion of the DC electrical power to AC. 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