Delta-Connected Variable Load

Three-phase AC load connected in a Delta pattern.

delta connected variable load

Description

The Delta-Connected Variable Load unit simulates a delta-connected variable three-phase load. Each phase of the load contains a resistor. The block calculates the resistance required to produce an active power equal to the value at the P input port at a given nominal voltage. In this way, the block can represent an active load.

To ensure that the resistance is always greater than zero, the minimum active power consumed by the load is set. The minimum active power must be greater than zero.

Equations

Resistance is defined as follows:

Where:

- is the series resistance of each phase.

- RMS nominal line voltage.

- the required three-phase active power.

If the value at the P input port is less than the Minimum real power, the unit uses the minimum active power to calculate the resistance.

Ports

Input

P - active power
scalar

The signal input port associated with the active power.

Non-directional

~ - three-phase port
electricity

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

Parameters

Main

Rated voltage - rated line voltage
`24e3 V (By default)

RMS value of the nominal linear voltage for the resistance equation.

Minimum real power - minimum active power
1e3 W (by default)

The minimum active power dissipated by a three-phase load when the nominal voltage is applied. The value must be greater than 0.