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The Power, 3-ph component computes the mean value of the instantaneous active power P (in watts) and reactive power Q (in vars) associated with a periodic set of three-phase voltages and currents over a running window of one cycle of the specified fundamental frequency.

The output signal Q is accurate only for balanced and harmonic-free three-phase voltages and currents.

The output is held constant to the specified Initial active power and Initial reactive power values for one cycle of the specified fundamental frequency.

Symbol

Mask Parameters

NameDescriptionUnitVariable = {Possible Values}
DescriptionUse this field to add all kinds of information about the component
Description = {'string'}
Fundamental frequencyFundamental frequency used for the calculation of the active power (P) and the reactive power (Q). This value cannot be modified during the simulationHzFnom = { [0, 1e12] }
Initial active power
Initial active power value of the magnitude of the output signal for the first simulation cycle. This value cannot be modified during the simulationWPmean_init = { [-1e64 1e64] }
Initial reactive power
Initial reactive power value of the magnitude of the output signal for the first simulation cycle. This value cannot be modified during the simulationVarQmean_init = { [-1e64 1e64] }

Input/Output Signals

Name

Description

Type

Vabc

Vectorized signal containing phase-to-ground voltages (Va, Vb and Vc)

Input

Iabc

Vectorized signal containing phase-to-ground currents (Ia, Ib and Ic)

Input

Pmean

Signal containing the average active power resulting from the voltage and current signals

Output

Qmean

Signal containing the average reactive power resulting from the voltage and current signals

Output

Sensor Descriptions

Name

DescriptionUnit

Vabc[a]

Signal containing the voltage of phase A

V

Vabc[b]

Signal containing the voltage of phase B

V

Vabc[c]

Signal containing the voltage of phase C

V

Iabc[a]

Signal containing the current of phase A

A

Iabc[b]

Signal containing the current of phase B

A

Iabc[c]

Signal containing the current of phase C

A

Pmean

Signal containing the average active power resulting from the voltage and current signals

W

Qmean

Signal containing the average reactive power resulting from the voltage and current signals

Var

Internal Circuit of the Component

Example Model

This example demonstrates the usage of the 3-phase power calculation block. A 240V 60Hz signal connected to a 3kW 0.6 kVar load is used for demonstration.

Note that the following demo requires that users edit the ScopeView template, and replace the existing .oprec data source with the data generated during the simulation.

Simulation results

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