Learn more about SimPowerSystems

Three-Phase Series RLC Load - Implement three-phase series RLC load with selectable connection

Library

Elements

Description

The Three-Phase Series RLC Load block implements a three-phase balanced load as a series combination of RLC elements. At the specified frequency, the load exhibits a constant impedance. The active and reactive powers absorbed by the load are proportional to the square of the applied voltage.

Only elements associated with nonzero powers are displayed in the block icon.

Dialog Box and Parameters

Configuration

The connection of the three phases. Select one of the following four connections:

Y(grounded)	Neutral is grounded.
Y(floating)	Neutral is not accessible.
Y(neutral)	Neutral is made accessible through a fourth connector.
Delta	Three phases connected in delta

The block icon is updated according to the load connection.

Nominal phase-to-phase voltage Vn

The nominal phase-to-phase voltage of the load, in volts RMS (Vrms).

Nominal frequency fn

The nominal frequency, in hertz (Hz).

Active power P

The three-phase active power of the load, in watts (W).

Inductive reactive power QL

The three-phase inductive reactive power QL, in vars. Specify a positive value, or 0.

Capacitive reactive power Qc

The three-phase capacitive reactive power QC, in vars. Specify a positive value, or 0.

Measurements

Select Branch voltages to measure the three voltages across each phase of the Three-Phase Series RLC Load block terminals. For a Y connection, these voltages are the phase-to-ground or phase-to-neutral voltages. For a delta connection, these voltages are the phase-to-phase voltages.

Select Branch currents to measure the three total currents (sum of R, L, C currents) flowing through each phase of the Three-Phase Series RLC Load block. For a delta connection, these currents are the currents flowing in each branch of the delta.

Select Branch voltages and currents to measure the three voltages and the three currents of the Three-Phase Series RLC Load block.

Place a Multimeter block in your model to display the selected measurements during the simulation. In the Available Measurements list box of the Multimeter block, the measurements are identified by a label followed by the block name.

Measurement		Label
Branch voltages	Y(grounded): Uag, Ubg, Ucg	Uag: , Ubg: , Ucg:
	Y(floating): Uan, Ubn, Ucn	Uan: , Ubn: , Ucn:
	Y(neutral): Uan, Ubn, Ucn	Uan: , Ubn: , Ucn:
	Delta: Uab, Ubc, Uca	Uab: , Ubc: , Uca:
Branch currents	Y(grounded): Ia, Ib, Ic	Iag: , Ibg: , Icg:
	Y(floating): Ia, Ib, Ic	Ian: , Ibn: , Icn:
	Y(neutral): Ia, Ib, Ic	Ian: , Ibn: , Icn:
	Delta: Iab, Ibc, Ica	Iab: , Ibc: , Ica:

See Also

Multimeter, Three-Phase Dynamic Load, Three-Phase Parallel RLC Branch, Three-Phase Parallel RLC Load, Three-Phase Series RLC Branch

Three-Phase Series RLC Branch

Three-Phase Source

© 1984-2009- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS