Power values and harmonics: Difference between revisions
From Electrical Installation Guide
(Created page with '{{Menu_Harmonic_management}} __TOC__ ===== Active power ===== The active power P of a signal comprising harmonics is the sum of the active powers resulting from the currents a…') |
No edit summary |
||
| Line 2: | Line 2: | ||
__TOC__ | __TOC__ | ||
== Active power == | |||
The active power P of a signal comprising harmonics is the sum of the active powers resulting from the currents and voltages of the same order. | The active power P of a signal comprising harmonics is the sum of the active powers resulting from the currents and voltages of the same order. | ||
== Reactive power == | |||
Reactive power is defined exclusively in terms of the fundamental, i.e.<br><math>Q=U1 \times I1 \times Sin \phi 1</math> | Reactive power is defined exclusively in terms of the fundamental, i.e.<br><math>Q=U1 \times I1 \times Sin \phi 1</math> | ||
== Distortion power == | |||
When harmonics are present, the distortion power D is defined as <br><math>D= \left(S^2 - P^2 -Q^2 \right)^{1/2} </math>where S is the apparent power. | When harmonics are present, the distortion power D is defined as <br><math>D= \left(S^2 - P^2 -Q^2 \right)^{1/2} </math>where S is the apparent power. | ||
Revision as of 08:58, 16 June 2011
Active power
The active power P of a signal comprising harmonics is the sum of the active powers resulting from the currents and voltages of the same order.
Reactive power
Reactive power is defined exclusively in terms of the fundamental, i.e.
[math]\displaystyle{ Q=U1 \times I1 \times Sin \phi 1 }[/math]
Distortion power
When harmonics are present, the distortion power D is defined as
[math]\displaystyle{ D= \left(S^2 - P^2 -Q^2 \right)^{1/2} }[/math]where S is the apparent power.
