Overview
The “Power swing blocking” detects power swings, evaluates the impedances per phase accordingly, checks the impedance trajectory on a continual basis, reports the power-swing detection per phase, blocks the selected zones of the distance protection in case of power swings, detects 1-phase, 2-phase, and 3-phase short circuits during a power swing and then cancels the blocking for the specific phase, works during a 1-pole dead time, activates only when the distance-protection function is active , does not generate tripping of the out-of-step condition; a separate out-of-step protection function is available for this purpose.
For more detailed information on “Power swing blocking”, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Power Swing Blocking Together with the Distance Protection Function
Setting Parameters
Setting parameters for Power swing blocking
| Addr. | Parameter | C | Setting Options | Default Setting |
| Power-Swing Blocking | ||||
| _:1 | 68 P.swing blk:Mode | off on test |
off | |
| _:103 | 68 P.swing blk:Max. blocking time | 0.00 s to 60.00 s; ∞ | -1 s | |
| _:102 | 68 P.swing blk:Zones to be blocked | Setting options depend on configuration | ||
Logic Diagrams & highlights
Power Swings
Impedance Vectors During a Power Swing and During a Short Circuit
Operating Range for the Power-Swing Detection for Polygonal and MHO Characteristic
Power-Swing Blocking Logic
