Power (Phasor)

Compute active and reactive powers using voltage and current phasors

Library

Simscape / Electrical / Specialized Power Systems / Sensors and Measurements

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Description

The Power (Phasor) block computes the active power P and reactive power Q of a pair of voltage-current signals. P and Q are computed as follows:

$$P+jQ=\frac{1}{2}\left(V\times I^{\ast }\right)$$

I^* = complex conjugate of I.

Sign conventions are defined as

Inputs and Outputs

V

The phasor (complex signal) voltage, in volts peak.

I

The phasor (complex signal) current, in amperes peak.

P

Returns the active power, in watts.

Q

Returns the active power, in vars.

Characteristics

Direct Feedthrough	Yes
Dimensionalized	Yes

Examples

The power_PhasorPowerMeasurements example shows the use of the Power (Phasor) block.

Version History

Introduced in R2013a