RLC (Three-Phase)

Three-phase impedance

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Description

The RLC (Three-Phase) block models a three-phase impedance with two three-phase connections. Each of the three identical impedance components can include any combination of a resistor (R), capacitor (C), and inductor (L), connected in series or in parallel.

Define the values for the R, L, and C components by specifying the appropriate block parameters. Do not set the parameter values to zero or infinity to remove terms; instead, select the correct option for the Component structure parameter.

For certain combinations of R, L, and C, for some circuit topologies, specify parasitic resistance or conductance values that help the simulation to converge numerically. These parasitic terms ensure that an inductor has a small parallel resistive path and that a capacitor has a small series resistance.

Block parameterization

The following two tables list the block parameters for each Component structure, based on the selected Parameterization option:

  • Specify by rated power

  • Specify component values directly

Component StructureMain ParametersParasitics ParametersInitial Conditions Parameters

R

Resistance

None

None

L

Inductance

Parasitic parallel conductance

Initial inductor current [ Ia Ib Ic ]

C

Capacitance

Parasitic series resistance

Initial capacitor voltage [ Va Vb Vc ]

Series RL

Resistance

Inductance

Parasitic parallel conductance

Initial inductor current [ Ia Ib Ic ]

Series RC

Resistance

Capacitance

None

Initial capacitor voltage [ Va Vb Vc ]

Series LC

Inductance

Capacitance

Parasitic parallel conductance

Initial inductor current [ Ia Ib Ic ]

Initial capacitor voltage [ Va Vb Vc ]

Series RLC

Resistance

Inductance

Capacitance

Parasitic parallel conductance

Initial inductor current [ Ia Ib Ic ]

Initial capacitor voltage [ Va Vb Vc ]

Parallel RL

Resistance

Inductance

None

Initial inductor current [ Ia Ib Ic ]

Parallel RC

Resistance

Capacitance

Parasitic series resistance

Initial capacitor voltage [ Va Vb Vc ]

Parallel LC

Inductance

Capacitance

Parasitic series resistance

Initial inductor current [ Ia Ib Ic ]

Initial capacitor voltage [ Va Vb Vc ]

Parallel RLC

Resistance

Inductance

Capacitance

Parasitic series resistance

Initial inductor current [ Ia Ib Ic ]

Initial capacitor voltage [ Va Vb Vc ]

Ports

Conserving

expand all

Expandable three-phase port.

Expandable three-phase port.

Parameters

expand all

Main

Select the desired combination of a resistor (R), capacitor (C), and inductor (L), connected in series or in parallel.

Resistance of each of the line impedances.

Dependencies

This parameter is visible only when you select a component structure that includes a resistor.

Inductance of each of the line impedances. This parameter is visible only when you select a component structure that includes an inductor.

Dependencies

This parameter is visible only when you select a component structure that includes an inductor.

Capacitance in each of the line impedances.

Dependencies

This parameter is visible only when you select a component structure that includes a capacitor.

Parasitics

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

Represents small parasitic effects. The parameter value corresponds to the parallel conductance value added across all instances of inductors in the load.

Initial Conditions

Initial current in the a, b, and c phase inductors, respectively.

Dependencies

This parameter is visible only when you select a component structure that includes an inductor.

Initial voltage across the a, b, and c phase capacitors, respectively.

Dependencies

This parameter is visible only when you select a component structure that includes a capacitor.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Introduced in R2013b