Wye-Connected Load

A three-phase load connected according to the Star scheme.

blockType: AcausalElectricPowerSystems.Passive.RLC_Assemblies.WyeConnectedLoad

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Description

Block Wye-Connected Load simulates a three-phase load connected according to the Star scheme. Each phase of the load can include any combination of resistor , of the capacitor and the inductors , connected in series or in parallel. The load is phase-symmetric, that is, the values of resistance, capacitance and inductance of all phases are the same.

Component values , and They can be set either directly as resistance, inductance, and capacitance, or through the values of rated powers (i.e., at rated voltage and frequency).

If the block is parameterized directly through the values , and , then a three-element vector is set for initialization-a string of initial voltages for the capacitor and a three-element vector-a string of initial currents for the inductor.
If the unit is parameterized through the nominal power values, the initial voltage value, the initial voltage phase, and the initial frequency are set for initialization. For example, if the load is connected directly to a three-phase voltage source, the initial values should be equal to the RMS values of the line voltage, frequency, and phase of this source. To set the initial voltage to zero, set the initial voltage to 0.

Parameterization of the block

The following two tables list the block parameters for each component structure based on the selected parameterization option.

According to the rated power.

The structure of the components Basic parameters Parameters of the initial conditions

The structure of the components	Basic parameters	Parameters of the initial conditions
`R`	Rated voltage Active power	No
`L`	Rated voltage Rated frequency Inductive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`C`	Rated voltage Rated frequency Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Series RL`	Rated voltage Rated frequency Active power Inductive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Series RC`	Rated voltage Rated frequency Active power Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Series LC`	Rated voltage Rated frequency Inductive reactive power Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Series RLC`	Rated voltage Rated frequency Active power Inductive reactive power Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Parallel RL`	Rated voltage Rated frequency Active power Inductive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Parallel RC`	Rated voltage Rated frequency Active power Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Parallel LC`	Rated voltage Rated frequency Inductive reactive power Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency
`Parallel RLC`	Rated voltage Rated frequency Active power Inductive reactive power Capacitive reactive power	The amount of voltage at the terminals Terminal voltage phase Frequency

R

Rated voltage

Active power

L

Rated voltage

Rated frequency

Inductive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

C

Rated voltage

Rated frequency

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Series RL

Rated voltage

Rated frequency

Active power

Inductive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Series RC

Rated voltage

Rated frequency

Active power

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Series LC

Rated voltage

Rated frequency

Inductive reactive power

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Series RLC

Rated voltage

Rated frequency

Active power

Inductive reactive power

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Parallel RL

Rated voltage

Rated frequency

Active power

Inductive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Parallel RC

Rated voltage

Rated frequency

Active power

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Parallel LC

Rated voltage

Rated frequency

Inductive reactive power

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

Parallel RLC

Rated voltage

Rated frequency

Active power

Inductive reactive power

Capacitive reactive power

The amount of voltage at the terminals

Terminal voltage phase

Frequency

The values of the components directly.

The structure of the components Basic parameters Parameters of the initial conditions

The structure of the components	Basic parameters	Parameters of the initial conditions
`R`	Resistance	No
`L`	Inductance	The initial current of the inductor `[Ia Ib Ic]`
`C`	Container	Initial voltage of the capacitor `[Va Vb Vc]`
`Series RL`	Resistance Inductance	The initial current of the inductor `[Ia Ib Ic]`
`Series RC`	Resistance Container	Initial voltage of the capacitor `[Va Vb Vc]`
`Series LC`	Inductance Container	The initial current of the inductor `[Ia Ib Ic]` Initial voltage of the capacitor `[Va Vb Vc]`
`Series RLC`	Resistance Inductance Container	The initial current of the inductor `[Ia Ib Ic]` Initial capacitor voltage `[Va Vb Vc]`
`Parallel RL`	Resistance Inductance	The initial current of the inductor `[Ia Ib Ic]`
`Parallel RC`	Resistance Container	Initial voltage of the capacitor `[Va Vb Vc]`
`Parallel LC`	Inductance Container	The initial current of the inductor `[Ia Ib Ic]` Initial voltage of the capacitor `[Va Vb Vc]`
`Parallel RLC`	Resistance Inductance Container	The initial current of the inductor `[Ia Ib Ic]` Initial voltage of the capacitor `[Va Vb Vc]`

R

Resistance

L

Inductance

The initial current of the inductor [Ia Ib Ic]

C

Container

Initial voltage of the capacitor [Va Vb Vc]

Series RL

Resistance

Inductance

The initial current of the inductor [Ia Ib Ic]

Series RC

Resistance

Container

Initial voltage of the capacitor [Va Vb Vc]

Series LC

Inductance

Container

The initial current of the inductor [Ia Ib Ic]

Initial voltage of the capacitor [Va Vb Vc]

Series RLC

Resistance

Inductance

Container

The initial current of the inductor [Ia Ib Ic]

Initial capacitor voltage [Va Vb Vc]

Parallel RL

Resistance

Inductance

The initial current of the inductor [Ia Ib Ic]

Parallel RC

Resistance

Container

Initial voltage of the capacitor [Va Vb Vc]

Parallel LC

Inductance

Container

The initial current of the inductor [Ia Ib Ic]

Initial voltage of the capacitor [Va Vb Vc]

Parallel RLC

Resistance

Inductance

Container

The initial current of the inductor [Ia Ib Ic]

Initial voltage of the capacitor [Va Vb Vc]

Variables

Use the parameter group Initial Targets to set the priority and initial target values for the block parameter variables before modeling. For more information, see Configuring physical blocks using target values.

Ports

Conserving

# ~ — three-phase port
electricity

Details

Three-phase electrical port for connecting the load to the network.

Program usage name

port

# n — neutral
electricity

Details

The electrical port corresponds to the neutral point of the star.

Program usage name

n

Parameters

Main

# Parameterization — parameterization
Specify component values directly | Specify by rated power

Details

Parameterization of the block:

Specify by rated power — values for components , and They are set using the values of rated power at rated voltage and frequency.
Specify component values directly — values for components , and They are set directly as resistance, inductance, and capacitance.

Switching the parameter value Parameterization resets the parameter value Component structure. First, select the parameter value Parameterization and then Component structure. If you switch the parameter value later Parameterization, check the parameter value Component structure and select it again, if necessary.

Values	`Specify component values directly` \| `Specify by rated power`
Default value	`Specify by rated power`
Program usage name	`parameterization`
Evaluatable	No

Details

Sets the resistor combination ( ), the capacitor ( ) and inductors ( ), connected in series or in parallel.

Values	`R` \| `L` \| `C` \| `Series RL` \| `Series RC` \| `Series LC` \| `Series RLC` \| `Parallel RL` \| `Parallel RC` \| `Parallel LC` \| `Parallel RLC`
Default value	`R`
Program usage names	`component_structure`, `component_structure_PQ`
Evaluatable	No

# Resistance — resistance
Ohm | mOhm | kOhm | MOhm | GOhm

Details

The resistance of each resistor.

Dependencies

This parameter is used only when selecting a value. Specify component values directly the parameter Parameterization and choosing the structure of the component that includes the resistor.

Units	`Ohm` \| `mOhm` \| `kOhm` \| `MOhm` \| `GOhm`
Default value	`1.0 Ohm`
Program usage name	`R`
Evaluatable	Yes

# Inductance — inductance
H | nH | uH | mH

Details

The inductance of each coil.

Dependencies

This parameter is used only when selecting a value. Specify component values directly the parameter Parameterization and the choice of the component structure, including the inductor.

Units	`H` \| `nH` \| `uH` \| `mH`
Default value	`1e-3 H`
Program usage name	`L`
Evaluatable	Yes

# Capacitance — container
F | pF | nF | uF | mF

Details

The capacity of each capacitor.

Dependencies

This parameter is used only when selecting a value. Specify component values directly the parameter Parameterization and the choice of the component structure, including the capacitor.

Units	`F` \| `pF` \| `nF` \| `uF` \| `mF`
Default value	`1e-06 F`
Program usage name	`C`
Evaluatable	Yes

# Rated voltage — Rated voltage
V | uV | mV | kV | MV

Details

The voltage for which the load capacities are specified.

Dependencies

This parameter is used only when selecting a value. Specify by rated power the parameter Parameterization.

Units	`V` \| `uV` \| `mV` \| `kV` \| `MV`
Default value	`24e3 V`
Program usage name	`V_rated`
Evaluatable	Yes

# Rated electrical frequency — Rated frequency
Hz | kHz | MHz | GHz

Details

The frequency for which the reactive power of the load is specified.

Dependencies

This parameter is used only when selecting a value. Specify by rated power the parameter Parameterization.

Units	`Hz` \| `kHz` \| `MHz` \| `GHz`
Default value	`50 Hz`
Program usage name	`f_rated`
Evaluatable	Yes

# Real power — total active power dissipation
W | uW | mW | kW | MW | GW | V*A | HP_DIN

Details

The total active power dissipated by a three-phase load at rated voltage. The value must be higher 0.

Dependencies

This parameter is used only when selecting a value. Specify by rated power the parameter Parameterization and choosing the structure of the component that includes the resistor.

Units	`W` \| `uW` \| `mW` \| `kW` \| `MW` \| `GW` \| `V*A` \| `HP_DIN`
Default value	`1e3 W`
Program usage name	`P`
Evaluatable	Yes

# Inductive reactive power — inductive reactive power
W | uW | mW | kW | MW | GW | V*A | HP_DIN

Details

The total inductive reactive power consumed by a three-phase load at rated voltage. The value must be greater than 0.

Dependencies

This parameter is used only when selecting a value. Specify by rated power the parameter Parameterization and the choice of the component structure, including the inductor.

Units	`W` \| `uW` \| `mW` \| `kW` \| `MW` \| `GW` \| `V*A` \| `HP_DIN`
Default value	`1e2 V*A`
Program usage name	`Q_l`
Evaluatable	Yes

# Capacitive reactive power — total capacitive reactive power
W | uW | mW | kW | MW | GW | V*A | HP_DIN

Details

The total capacitive reactive power consumed by a three-phase load at rated voltage. The value should be less than 0.

Dependencies

This parameter is used only when selecting a value. Specify by rated power the parameter Parameterization and the choice of the component structure, including the capacitor.

Units	`W` \| `uW` \| `mW` \| `kW` \| `MW` \| `GW` \| `V*A` \| `HP_DIN`
Default value	`-1e2 V*A`
Program usage name	`Q_c`
Evaluatable	Yes

Parasitics

# Parasitic series resistance — parasitic sequential resistance
Ohm | mOhm | kOhm | MOhm | GOhm

Details

It represents small parasitic effects. The value of the parameter corresponds to the value of the series resistance added to all instances of capacitors in the load.

Units	`Ohm` \| `mOhm` \| `kOhm` \| `MOhm` \| `GOhm`
Default value	`0.0 Ohm`
Program usage names	`R_parasitic`, `R_parasitic_PQ`
Evaluatable	Yes

# Parasitic parallel conductance — parasitic parallel conduction
S | nS | uS | mS | 1/Ohm

Details

It represents small parasitic effects. The parameter value corresponds to the parallel conduction value added to all instances of inductors in the load.

If you set for the parameter Component structure one of the values is Series RL, Series LC or Series RLC The parasitic parallel conduction is connected through a complete block branch.

Units	`S` \| `nS` \| `uS` \| `mS` \| `1/Ohm`
Default value	`0.0 1/Ohm`
Program usage names	`G_parasitic`, `G_parasitic_PQ`
Evaluatable	Yes

Initial Conditions

# Terminal voltage magnitude — the initial voltage amplitude at the terminals
V | uV | mV | kV | MV

Details

Dependencies

To use this parameter, set for the parameter Parameterization meaning Specify by rated power, and for the parameter Component structure any value other than R.

Units	`V` \| `uV` \| `mV` \| `kV` \| `MV`
Default value	`24e3 V`
Program usage name	`V_mag_start`
Evaluatable	Yes

# Terminal voltage angle — the initial phase of terminal voltage
rad | deg | rev | mrad | arcsec | arcmin | gon

Details

The initial phase of the terminal voltage.

Dependencies

To use this parameter, set for the parameter Parameterization meaning Specify by rated power, and for the parameter Component structure any value other than R.

Units	`rad` \| `deg` \| `rev` \| `mrad` \| `arcsec` \| `arcmin` \| `gon`
Default value	`0 deg`
Program usage name	`V_ang_start`
Evaluatable	Yes

# Frequency — Initial frequency
Hz | kHz | MHz | GHz

Details

The frequency of the first simulation cycle.

Dependencies

To use this parameter, set for the parameter Parameterization meaning Specify by rated power, and for the parameter Component structure any value other than R.

Units	`Hz` \| `kHz` \| `MHz` \| `GHz`
Default value	`50 Hz`
Program usage name	`f_start`
Evaluatable	Yes

Wye-Connected Load

Description

Parameterization of the block

Variables

Ports

Conserving

Parameters

Main

Parasitics

Initial Conditions

Examples