Overview
The “Power Swing Logic (PSLPSCH)” is a complementary function to Power Swing Detection (ZMRPSB) function. It provides possibility for selective tripping of faults on power lines during system oscillations (power swings or pole slips), when the distance protection function should normally be blocked.
For more detailed information on “Power Swing Logic (PSLPSCH)”, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
Signals & Setting Parameters
PSLPSCH Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Power swing logic | PSLPSCH | – | – |
PSLPSCH function block
PSLPSCH Input signals
| PSLPSCH Input signals | |||
| Name | Type | Default | Description |
| BLOCK | BOOLEAN | 0 | Block of function |
| STZMUR | BOOLEAN | 0 | Start of the underreaching zone |
| STZMOR | BOOLEAN | 0 | Start of the overreaching zone |
| STPSD | BOOLEAN | 0 | Power swing detected |
| STDEF | BOOLEAN | 0 | Start from Earth Fault Protection in forward or reverse direction |
| STZMPSD | BOOLEAN | 0 | Operation of Power Swing Detection external characteristic |
| CACC | BOOLEAN | 0 | Overreaching ZM zone to be accelerated |
| AR1P1 | BOOLEAN | 0 | Single pole auto-reclosing in progress |
| CSUR | BOOLEAN | 0 | Carrier send by the underreaching power-swing zone |
| CR | BOOLEAN | 0 | Carrier receive signal during power swing detection operation |
PSLPSCH Output signals
| PSLPSCH Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Trip through Power Swing Logic | |
| STZMURPS | BOOLEAN | Start of Underreaching zone controlled by PSL to be used in configuration | |
| BLKZMUR | BOOLEAN | Block trip of underreaching impedance zone | |
| BLKZMOR | BOOLEAN | Block trip of overreaching distance protection zones | |
| CS | BOOLEAN | Carrier send signal controlled by the power swing | |
PSLPSCH Group settings (basic)
| PSLPSCH Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| tDZ | 0.000 – 60.000 | s | 0.001 | 0.050 | Permitted max oper time diff between higher and lower zone |
| tDZMUR | 0.000 – 60.000 | s | 0.001 | 0.200 | Delay for oper of underreach zone with detected diff in oper time |
| tCS | 0.000 – 60.000 | s | 0.001 | 0.100 | Conditional timer for sending the CS at power swings |
| tTrip | 0.000 – 60.000 | s | 0.001 | 0.100 | Conditional timer for tripping at power swings |
| tBlkTr | 0.000 – 60.000 | s | 0.001 | 0.300 | Timer for blocking the overreaching zones trip |
Logics & highlights
Simplified logic diagram – power swing communication and tripping logic
Control of underreaching distance protection (Zone 1) at power swings caused by the faults and their clearance on adjacent lines and other system elements
