Power (dq0, Instantaneous)
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Three-phase instantaneous active and reactive power.
Description
The Power (dq0, Instantaneous) block calculates three-phase instantaneous active and reactive powers from a periodic set of three-phase voltages and currents expressed in the coordinate system .
The calculations are performed using the following formulae:
The Vdq0 and Idq0 inputs (direct axis, quadrature axis and zero-sequence components) of three-phase voltage and current are normally connected to the outputs of the abc-to-dq0 conversion unit. According to these formulae, the current flowing in the RL circuit produces a positive value of P and a positive value of Q. The calculated instantaneous reactive power is accurate only for balanced and harmonic-free three-phase voltages and currents.
Ports
Input
#
Vdq0
—
voltage signal expressed in the reference frame
scalar
Details
Voltage signal expressed in the reference frame .
| Data types |
|
| Complex numbers support |
No |
#
Idq0
—
current signal expressed in the reference frame
scalar
Details
Current signal expressed in the reference frame .
| Data types |
|
| Complex numbers support |
No |
Output
#
P
—
three-phase instantaneous active power
scalar
Details
Three-phase instantaneous active power P, in W.
| Data types |
|
| Complex numbers support |
No |
#
Q
—
three-phase instantaneous reactive power
scalar
Details
Three-phase instantaneous reactive power Q, in VAR.
| Data types |
|
| Complex numbers support |
No |