Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads

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Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads

Package with load models for three-phase unbalanced AC systems

Information

This package contains models that represent different types of three phases unbalanced AC loads.

Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).

Package Content

Name	Description
Capacitive	Model of a three-phase unbalanced capacitive load without neutral cable
Capacitive_N	Model of a three-phase unbalanced capacitive load with neutral cable
Impedance	Model of a three-phase unbalanced impedance without neutral cable
Impedance_N	Model of a three-phase unbalanced impedance with neutral cable
Inductive	Model of a three-phase unbalanced inductive load without neutral cable
Inductive_N	Model of a three-phase unbalanced inductive load with neutral cable
Resistive	Model of a three-phase unbalanced resistive load without neutral cable
Resistive_N	Model of a three-phase unbalanced resistive load with neutral cable
Examples	Package with example models
BaseClasses	Package with base class models

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Capacitive

Model of a three-phase unbalanced capacitive load without neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Capacitive

Information

This model represents a three-phase unbalanced capacitive load. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl and uses the load model from the package Buildings.Electrical.AC.OnePhase.Loads. The model computes the voltages, currents and powers on each phase.

For more information, see Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl and Buildings.Electrical.AC.OnePhase.Loads.Capacitive.

Extends from BaseClasses.LoadCtrl (Partial model of a three-phase load with voltage controller without neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Modelling assumption
Boolean	linearized	false	If =true introduce a linearization in the load
Load	mode	Buildings.Electrical.Types.L...	Parameters that specifies the mode of the load (e.g., steady state, dynamic, prescribed power consumption, etc.)
Boolean	use_pf_in	false	If true, the power factor is defined by an input
Nominal conditions
Power	P_nominal		Nominal power (negative if consumed, positive if generated) [W]
Voltage	V_nominal		Nominal voltage (V_nominal >= 0) [V]
Real	pf	0.8	Power factor
Voltage CTRL
Boolean	voltageCtrl	false	This flag enables the voltage control
Real	vThresh	0.1	Threshold that activates voltage ctrl (ratio of nominal voltage)
Time	tDelay	300	Time to wait before plugging the load again after disconnection [s]
initialization
InitMode	initMode	Buildings.Electrical.Types.I...	Initialization mode for homotopy operator

Connectors

Type	Name	Description
input RealInput	y1	Fraction of the nominal power consumed
input RealInput	Pow1	Power consumed [W]
input RealInput	y2	Fraction of the nominal power consumed
input RealInput	Pow2	Power consumed [W]
input RealInput	y3	Fraction of the nominal power consumed
input RealInput	Pow3	Power consumed [W]
Terminal_n	terminal	Connector for three-phase unbalanced systems without neutral cable
input RealInput	pf_in_1	Power factor of load on phase 1 [1]
input RealInput	pf_in_2	Power factor of load on phase 2 [1]
input RealInput	pf_in_3	Power factor of load on phase 3 [1]

Modelica definition

model Capacitive "Model of a three-phase unbalanced capacitive load without neutral cable" extends BaseClasses.LoadCtrl( redeclare Buildings.Electrical.AC.OnePhase.Loads.Capacitive load1(pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Capacitive load2(pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Capacitive load3(pf=pf, use_pf_in=use_pf_in)); parameter Boolean use_pf_in = false "If true, the power factor is defined by an input"; parameter Real pf(min=0, max=1) = 0.8 "Power factor"; Modelica.Blocks.Interfaces.RealInput pf_in_1( min=0, max=1, unit="1") if (use_pf_in and plugPhase1) "Power factor of load on phase 1"; Modelica.Blocks.Interfaces.RealInput pf_in_2( min=0, max=1, unit="1") if (use_pf_in and plugPhase2) "Power factor of load on phase 2"; Modelica.Blocks.Interfaces.RealInput pf_in_3( min=0, max=1, unit="1") if (use_pf_in and plugPhase3) "Power factor of load on phase 3"; equation connect(pf_in_1, load1.pf_in); connect(pf_in_2, load2.pf_in); connect(pf_in_3, load3.pf_in); end Capacitive;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Capacitive_N

Model of a three-phase unbalanced capacitive load with neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Capacitive_N

Information

This model represents a three-phase unbalanced capacitive load. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl_N and uses the load model from the package Buildings.Electrical.AC.OnePhase.Loads. The model computes the voltages, currents and powers on each phase.

This model has a connector with four cables and it represents the neutral cable. The current in the neutral cable is computed as the algebraic sum of the currents of the loads.

For more information, see Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl_N and Buildings.Electrical.AC.OnePhase.Loads.Capacitive.

Extends from BaseClasses.LoadCtrl_N (Partial model of a three-phase unbalanced load with voltage controller and neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Modelling assumption
Boolean	linearized	false	If =true introduce a linearization in the load
Load	mode	Buildings.Electrical.Types.L...	Parameters that specifies the mode of the load (e.g., steady state, dynamic, prescribed power consumption, etc.)
Boolean	use_pf_in	false	If true, the power factor is defined by an input
Nominal conditions
Power	P_nominal		Nominal power (negative if consumed, positive if generated) [W]
Voltage	V_nominal		Nominal voltage (V_nominal >= 0) [V]
Real	pf	0.8	Power factor
Voltage CTRL
Boolean	voltageCtrl	false	This flag enables the voltage control
Real	vThresh	0.1	Threshold that activates voltage ctrl (ratio of nominal voltage)
Time	tDelay	300	Time to wait before plugging the load again after disconnection [s]
initialization
InitMode	initMode	Buildings.Electrical.Types.I...	Initialization mode for homotopy operator

Connectors

Type	Name	Description
input RealInput	y1	Fraction of the nominal power consumed
input RealInput	Pow1	Power consumed [W]
input RealInput	y2	Fraction of the nominal power consumed
input RealInput	Pow2	Power consumed [W]
input RealInput	y3	Fraction of the nominal power consumed
input RealInput	Pow3	Power consumed [W]
Terminal4_n	terminal	Connector for three-phase unbalanced systems with neutral cable
input RealInput	pf_in_1	Power factor of load on phase 1 [1]
input RealInput	pf_in_2	Power factor of load on phase 2 [1]
input RealInput	pf_in_3	Power factor of load on phase 3 [1]

Modelica definition

model Capacitive_N "Model of a three-phase unbalanced capacitive load with neutral cable" extends BaseClasses.LoadCtrl_N( redeclare Buildings.Electrical.AC.OnePhase.Loads.Capacitive load1(pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Capacitive load2(pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Capacitive load3(pf=pf, use_pf_in=use_pf_in)); parameter Boolean use_pf_in = false "If true, the power factor is defined by an input"; parameter Real pf(min=0, max=1) = 0.8 "Power factor"; Modelica.Blocks.Interfaces.RealInput pf_in_1( min=0, max=1, unit="1") if (use_pf_in and plugPhase1) "Power factor of load on phase 1"; Modelica.Blocks.Interfaces.RealInput pf_in_2( min=0, max=1, unit="1") if (use_pf_in and plugPhase2) "Power factor of load on phase 2"; Modelica.Blocks.Interfaces.RealInput pf_in_3( min=0, max=1, unit="1") if (use_pf_in and plugPhase3) "Power factor of load on phase 3"; equation connect(pf_in_1, load1.pf_in); connect(pf_in_2, load2.pf_in); connect(pf_in_3, load3.pf_in); end Capacitive_N;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Impedance

Model of a three-phase unbalanced impedance without neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Impedance

Information

This model represents a three-phase unbalanced impedance without neutral cable. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.Impedance and uses the load model from the package Buildings.Electrical.AC.OnePhase.Impedance. The model computes the voltages, currents and powers on each phase.

Extends from BaseClasses.Impedance (Partial model of a three-phase unbalanced impedance without neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Boolean	inductive	true	If =true the load is inductive, otherwise it is capacitive
Resistance	R	1	Resistance [Ohm]
Inductance	L	0	Inductance [H]
Capacitance	C	0	Capacitance [F]
Variable load
Resistance
Boolean	use_R_in	false	if true, R is specified by an input
Resistance	RMin	1e-4	Minimum value of the resistance [Ohm]
Resistance	RMax	1e2	Maximum value of the resistance [Ohm]
Capacitance
Boolean	use_C_in	false	if true, C is specified by an input
Capacitance	CMin	1e-4	Minimum value of the capacitance [F]
Capacitance	CMax	1e2	Maximum value of the capacitance [F]
Inductance
Boolean	use_L_in	false	if true, L is specified by an input
Inductance	LMin	1e-4	Minimum value of the inductance [H]
Inductance	LMax	1e2	Maximum value of the inductance [H]

Connectors

Type	Name	Description
input RealInput	y_R	Input that sepecifies variable R
input RealInput	y_C	Input that sepecifies variable C
input RealInput	y_L	Input that sepecifies variable L
Terminal_n	terminal	Electrical connector

Modelica definition

model Impedance "Model of a three-phase unbalanced impedance without neutral cable" extends BaseClasses.Impedance( redeclare Buildings.Electrical.AC.OnePhase.Loads.Impedance load1, redeclare Buildings.Electrical.AC.OnePhase.Loads.Impedance load2, redeclare Buildings.Electrical.AC.OnePhase.Loads.Impedance load3); equation end Impedance;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Impedance_N

Model of a three-phase unbalanced impedance with neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Impedance_N

Information

This model represents a three-phase unbalanced impedance with neutral cable. The current in the neutral cable is computed as the algebraic sum of the currents of the loads. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.Impedance_N and uses the load model from the package Buildings.Electrical.AC.OnePhase.Impedance. The model computes the voltages, currents and powers on each phase.

Extends from BaseClasses.Impedance_N (Partial model of a three-phase unbalanced impedance with neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Boolean	inductive	true	If =true the load is inductive, otherwise it is capacitive
Resistance	R	1	Resistance [Ohm]
Inductance	L	0	Inductance [H]
Capacitance	C	0	Capacitance [F]
Variable load
Resistance
Boolean	use_R_in	false	if true, R is specified by an input
Resistance	RMin	1e-4	Minimum value of the resistance [Ohm]
Resistance	RMax	1e2	Maximum value of the resistance [Ohm]
Capacitance
Boolean	use_C_in	false	if true, C is specified by an input
Capacitance	CMin	1e-4	Minimum value of the capacitance [F]
Capacitance	CMax	1e2	Maximum value of the capacitance [F]
Inductance
Boolean	use_L_in	false	if true, L is specified by an input
Inductance	LMin	1e-4	Minimum value of the inductance [H]
Inductance	LMax	1e2	Maximum value of the inductance [H]

Connectors

Type	Name	Description
input RealInput	y_R	Input that sepecifies variable R
input RealInput	y_C	Input that sepecifies variable C
input RealInput	y_L	Input that sepecifies variable L
Terminal4_n	terminal	Electrical connector

Modelica definition

model Impedance_N "Model of a three-phase unbalanced impedance with neutral cable" extends BaseClasses.Impedance_N( redeclare Buildings.Electrical.AC.OnePhase.Loads.Impedance load1, redeclare Buildings.Electrical.AC.OnePhase.Loads.Impedance load2, redeclare Buildings.Electrical.AC.OnePhase.Loads.Impedance load3); equation end Impedance_N;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Inductive

Model of a three-phase unbalanced inductive load without neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Inductive

Information

This model represents a three-phase unbalanced inductive load. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl and uses the load model from the package Buildings.Electrical.AC.OnePhase.Loads. The model computes the voltages, currents and powers on each phase.

For more information, see Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl and Buildings.Electrical.AC.OnePhase.Loads.Inductive.

Extends from BaseClasses.LoadCtrl (Partial model of a three-phase load with voltage controller without neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Modelling assumption
Boolean	linearized	false	If =true introduce a linearization in the load
Load	mode	Buildings.Electrical.Types.L...	Parameters that specifies the mode of the load (e.g., steady state, dynamic, prescribed power consumption, etc.)
Boolean	use_pf_in	false	If true, the power factor is defined by an input
Nominal conditions
Power	P_nominal		Nominal power (negative if consumed, positive if generated) [W]
Voltage	V_nominal		Nominal voltage (V_nominal >= 0) [V]
Real	pf	0.8	Power factor
Voltage CTRL
Boolean	voltageCtrl	false	This flag enables the voltage control
Real	vThresh	0.1	Threshold that activates voltage ctrl (ratio of nominal voltage)
Time	tDelay	300	Time to wait before plugging the load again after disconnection [s]
initialization
InitMode	initMode	Buildings.Electrical.Types.I...	Initialization mode for homotopy operator

Connectors

Type	Name	Description
input RealInput	y1	Fraction of the nominal power consumed
input RealInput	Pow1	Power consumed [W]
input RealInput	y2	Fraction of the nominal power consumed
input RealInput	Pow2	Power consumed [W]
input RealInput	y3	Fraction of the nominal power consumed
input RealInput	Pow3	Power consumed [W]
Terminal_n	terminal	Connector for three-phase unbalanced systems without neutral cable
input RealInput	pf_in_1	Power factor of load on phase 1 [1]
input RealInput	pf_in_2	Power factor of load on phase 2 [1]
input RealInput	pf_in_3	Power factor of load on phase 3 [1]

Modelica definition

model Inductive "Model of a three-phase unbalanced inductive load without neutral cable" extends BaseClasses.LoadCtrl( redeclare Buildings.Electrical.AC.OnePhase.Loads.Inductive load1( pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Inductive load2( pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Inductive load3( pf=pf, use_pf_in=use_pf_in)); parameter Boolean use_pf_in = false "If true, the power factor is defined by an input"; parameter Real pf(min=0, max=1) = 0.8 "Power factor"; Modelica.Blocks.Interfaces.RealInput pf_in_1( min=0, max=1, unit="1") if (use_pf_in and plugPhase1) "Power factor of load on phase 1"; Modelica.Blocks.Interfaces.RealInput pf_in_2( min=0, max=1, unit="1") if (use_pf_in and plugPhase2) "Power factor of load on phase 2"; Modelica.Blocks.Interfaces.RealInput pf_in_3( min=0, max=1, unit="1") if (use_pf_in and plugPhase3) "Power factor of load on phase 3"; equation connect(pf_in_1, load1.pf_in); connect(pf_in_2, load2.pf_in); connect(pf_in_3, load3.pf_in); end Inductive;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Inductive_N

Model of a three-phase unbalanced inductive load with neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Inductive_N

Information

This model represents a three-phase unbalanced inductive load. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl_N and uses the load model from the package Buildings.Electrical.AC.OnePhase.Loads. The model computes the voltages, currents and powers on each phase.

This model has a connector with four cables and it represents the neutral cable. The current in the neutral cable is computed as the algebraic sum of the currents of the loads.

For more information, see Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl_N and Buildings.Electrical.AC.OnePhase.Loads.Inductive.

Extends from BaseClasses.LoadCtrl_N (Partial model of a three-phase unbalanced load with voltage controller and neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Modelling assumption
Boolean	linearized	false	If =true introduce a linearization in the load
Load	mode	Buildings.Electrical.Types.L...	Parameters that specifies the mode of the load (e.g., steady state, dynamic, prescribed power consumption, etc.)
Boolean	use_pf_in	false	If true, the power factor is defined by an input
Nominal conditions
Power	P_nominal		Nominal power (negative if consumed, positive if generated) [W]
Voltage	V_nominal		Nominal voltage (V_nominal >= 0) [V]
Real	pf	0.8	Power factor
Voltage CTRL
Boolean	voltageCtrl	false	This flag enables the voltage control
Real	vThresh	0.1	Threshold that activates voltage ctrl (ratio of nominal voltage)
Time	tDelay	300	Time to wait before plugging the load again after disconnection [s]
initialization
InitMode	initMode	Buildings.Electrical.Types.I...	Initialization mode for homotopy operator

Connectors

Type	Name	Description
input RealInput	y1	Fraction of the nominal power consumed
input RealInput	Pow1	Power consumed [W]
input RealInput	y2	Fraction of the nominal power consumed
input RealInput	Pow2	Power consumed [W]
input RealInput	y3	Fraction of the nominal power consumed
input RealInput	Pow3	Power consumed [W]
Terminal4_n	terminal	Connector for three-phase unbalanced systems with neutral cable
input RealInput	pf_in_1	Power factor of load on phase 1 [1]
input RealInput	pf_in_2	Power factor of load on phase 2 [1]
input RealInput	pf_in_3	Power factor of load on phase 3 [1]

Modelica definition

model Inductive_N "Model of a three-phase unbalanced inductive load with neutral cable" extends BaseClasses.LoadCtrl_N( redeclare Buildings.Electrical.AC.OnePhase.Loads.Inductive load1(pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Inductive load2(pf=pf, use_pf_in=use_pf_in), redeclare Buildings.Electrical.AC.OnePhase.Loads.Inductive load3(pf=pf, use_pf_in=use_pf_in)); parameter Boolean use_pf_in = false "If true, the power factor is defined by an input"; parameter Real pf(min=0, max=1) = 0.8 "Power factor"; Modelica.Blocks.Interfaces.RealInput pf_in_1( min=0, max=1, unit="1") if (use_pf_in and plugPhase1) "Power factor of load on phase 1"; Modelica.Blocks.Interfaces.RealInput pf_in_2( min=0, max=1, unit="1") if (use_pf_in and plugPhase2) "Power factor of load on phase 2"; Modelica.Blocks.Interfaces.RealInput pf_in_3( min=0, max=1, unit="1") if (use_pf_in and plugPhase3) "Power factor of load on phase 3"; equation connect(pf_in_1, load1.pf_in); connect(pf_in_2, load2.pf_in); connect(pf_in_3, load3.pf_in); end Inductive_N;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Resistive

Model of a three-phase unbalanced resistive load without neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Resistive

Information

This model represents a three-phase unbalanced resistive load. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl and uses the load model from the package Buildings.Electrical.AC.OnePhase.Loads. The model computes the voltages, currents and powers on each phase.

For more information, see Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl and Buildings.Electrical.AC.OnePhase.Loads.Resistive.

Extends from BaseClasses.LoadCtrl (Partial model of a three-phase load with voltage controller without neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Modelling assumption
Boolean	linearized	false	If =true introduce a linearization in the load
Load	mode	Buildings.Electrical.Types.L...	Parameters that specifies the mode of the load (e.g., steady state, dynamic, prescribed power consumption, etc.)
Nominal conditions
Power	P_nominal		Nominal power (negative if consumed, positive if generated) [W]
Voltage	V_nominal		Nominal voltage (V_nominal >= 0) [V]
Voltage CTRL
Boolean	voltageCtrl	false	This flag enables the voltage control
Real	vThresh	0.1	Threshold that activates voltage ctrl (ratio of nominal voltage)
Time	tDelay	300	Time to wait before plugging the load again after disconnection [s]
initialization
InitMode	initMode	Buildings.Electrical.Types.I...	Initialization mode for homotopy operator

Connectors

Type	Name	Description
input RealInput	y1	Fraction of the nominal power consumed
input RealInput	Pow1	Power consumed [W]
input RealInput	y2	Fraction of the nominal power consumed
input RealInput	Pow2	Power consumed [W]
input RealInput	y3	Fraction of the nominal power consumed
input RealInput	Pow3	Power consumed [W]
Terminal_n	terminal	Connector for three-phase unbalanced systems without neutral cable

Modelica definition

model Resistive "Model of a three-phase unbalanced resistive load without neutral cable" extends BaseClasses.LoadCtrl( redeclare Buildings.Electrical.AC.OnePhase.Loads.Resistive load1, redeclare Buildings.Electrical.AC.OnePhase.Loads.Resistive load2, redeclare Buildings.Electrical.AC.OnePhase.Loads.Resistive load3); equation end Resistive;

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Resistive_N

Model of a three-phase unbalanced resistive load with neutral cable

Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.Resistive_N

Information

This model represents a three-phase unbalanced resistive load. The model extends from Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl_N and uses the load model from the package Buildings.Electrical.AC.OnePhase.Loads. The model computes the voltages, currents and powers on each phase.

This model has a connector with four cables and it represents the neutral cable. The current in the neutral cable is computed as the algebraic sum of the currents of the loads.

For more information, see Buildings.Electrical.AC.ThreePhasesUnbalanced.Loads.BaseClasses.LoadCtrl_N and Buildings.Electrical.AC.OnePhase.Loads.Resistive.

Extends from BaseClasses.LoadCtrl_N (Partial model of a three-phase unbalanced load with voltage controller and neutral cable).

Parameters

Type	Name	Default	Description
Boolean	plugPhase1	true	If true, phase 1 is connected
Boolean	plugPhase2	true	If true, phase 2 is connected
Boolean	plugPhase3	true	If true, phase 3 is connected
LoadConnection	loadConn	Buildings.Electrical.Types.L...	Type of load connection (Yg or D)
Modelling assumption
Boolean	linearized	false	If =true introduce a linearization in the load
Load	mode	Buildings.Electrical.Types.L...	Parameters that specifies the mode of the load (e.g., steady state, dynamic, prescribed power consumption, etc.)
Nominal conditions
Power	P_nominal		Nominal power (negative if consumed, positive if generated) [W]
Voltage	V_nominal		Nominal voltage (V_nominal >= 0) [V]
Voltage CTRL
Boolean	voltageCtrl	false	This flag enables the voltage control
Real	vThresh	0.1	Threshold that activates voltage ctrl (ratio of nominal voltage)
Time	tDelay	300	Time to wait before plugging the load again after disconnection [s]
initialization
InitMode	initMode	Buildings.Electrical.Types.I...	Initialization mode for homotopy operator

Connectors

Type	Name	Description
input RealInput	y1	Fraction of the nominal power consumed
input RealInput	Pow1	Power consumed [W]
input RealInput	y2	Fraction of the nominal power consumed
input RealInput	Pow2	Power consumed [W]
input RealInput	y3	Fraction of the nominal power consumed
input RealInput	Pow3	Power consumed [W]
Terminal4_n	terminal	Connector for three-phase unbalanced systems with neutral cable

Modelica definition

model Resistive_N "Model of a three-phase unbalanced resistive load with neutral cable" extends BaseClasses.LoadCtrl_N( redeclare Buildings.Electrical.AC.OnePhase.Loads.Resistive load1, redeclare Buildings.Electrical.AC.OnePhase.Loads.Resistive load2, redeclare Buildings.Electrical.AC.OnePhase.Loads.Resistive load3); equation end Resistive_N;

Automatically generated Mon May 4 10:19:19 2015.