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

Name	Description	Unit	Variable = {Possible Values}
Description	Use this field to add all kinds of information about the component		Description = {'string'}
Fundamental frequency	Fundamental frequency used for the calculation of the active power (P) and the reactive power (Q). This value cannot be modified during the simulation	Hz	Fnom = { [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 simulation	W	Pmean_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 simulation	Var	Qmean_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	Description	Unit
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.

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