Electrical math
From HwB
(Difference between revisions)
(New page: == Power calculation == {| {{border}} ! Quantity !! Unit !! Name |- | P || W || Active power |- | Q || var || Reactive power |- | S || VA || Apparent power |} ...) |
|||
| Line 30: | Line 30: | ||
{| {{border}} | {| {{border}} | ||
| − | | +P || Import Active Power | + | | +P || Import Active Power |
|- | |- | ||
| − | | | + | | −P || Export Active Power |
|- | |- | ||
| − | | +Q || Import Reactive Power | + | | +Q || Import Reactive Power |
|- | |- | ||
| − | | | + | | −Q || Export Reactive Power |
|} | |} | ||
Revision as of 00:57, 10 February 2007
Power calculation
| Quantity | Unit | Name |
|---|---|---|
| P | W | Active power |
| Q | var | Reactive power |
| S | VA | Apparent power |
Power quadrants
| Quadrant | Phase angle φ |
Current relative to voltage |
|---|---|---|
| I | 0 to 90° | Lagging |
| II | 90 to 180° | Lagging |
| III | -180 to -90° | Leading |
| IV | -90 to 0° | Leading |
| +P | Import Active Power |
| −P | Export Active Power |
| +Q | Import Reactive Power |
| −Q | Export Reactive Power |