Overview
Sudden events in an electric power system such as large changes in load, fault occurrence or fault clearance, can cause power oscillations referred to as power swings. In a non-recoverable situation, the power swings become so severe that the synchronism is lost, a condition referred to as pole slipping. The main purpose of the “Pole slip protection (PSPPPAM)” is to
detect, evaluate, and take the required action for pole slipping occurrences in the power system.
For more detailed information on “Pole slip protection (PSPPPAM)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
Function Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Pole slip protection | PSPPPAM | Ucos | 78 |
Signals & Setting Parameters
PSPPPAM function block
PSPPPAM Input signals
| PSPPPAM Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Current group connection |
| U3P | GROUP SIGNAL | – | Voltage group connection |
| BLOCK | BOOLEAN | 0 | Block of function |
| BLKGEN | BOOLEAN | 0 | Block operation in generating direction |
| BLKMOTOR | BOOLEAN | 0 | Block operation in motor direction |
| EXTZONE1 | BOOLEAN | 0 | Extension of zone1 with zone2 region |
PSPPPAM Output signals
| PSPPPAM Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Common trip signal | |
| TRIP1 | BOOLEAN | Trip1 after the N1Limit slip in zone1 | |
| TRIP2 | BOOLEAN | Trip2 after the N2Limit slip in zone2 | |
| START | BOOLEAN | Common start signal | |
| ZONE1 | BOOLEAN | First slip in zone1 region | |
| ZONE2 | BOOLEAN | First slip in zone2 region | |
| GEN | BOOLEAN | Generator is faster than the system | |
| MOTOR | BOOLEAN | Generator is slower than the system | |
| SFREQ | REAL | Slip frequency | |
| SLIPZOHM | REAL | Slip impedance in ohms | |
| SLIPZPER | REAL | Slip impedance in percent of ZBase | |
| UCOS | REAL | UCosPhi voltage | |
| UCOSPER | REAL | UCosPhi voltage in percent of UBase | |
PSPPPAM Group settings (basic)
| PSPPPAM Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation On / Off |
| OperationZ1 | Off On |
– | – | On | Operation Zone1 On / Off |
| OperationZ2 | Off On |
– | – | On | Operation Zone2 On / Off |
| ImpedanceZA | 0.00 – 1000.00 | % | 0.01 | 10.00 | Forward impedance in % of Zbase |
| ImpedanceZB | 0.00 – 1000.00 | % | 0.01 | 10.00 | Reverse impedance in % of Zbase |
| ImpedanceZC | 0.00 – 1000.00 | % | 0.01 | 10.00 | Impedance of zone1 limit in % of Zbase |
| AnglePhi | 72.00 – 90.00 | Deg | 0.01 | 85.00 | Angle of the slip impedance line |
| StartAngle | 0.0 – 180.0 | Deg | 0.1 | 110.0 | Rotor angle for the start signal |
| TripAngle | 0.0 – 180.0 | Deg | 0.1 | 90.0 | Rotor angle for the trip1 and trip2 signals |
| N1Limit | 1 – 20 | – | 1 | 1 | Count limit for the trip1 signal |
| N2Limit | 1 – 20 | – | 1 | 3 | Count limit for the trip2 signal |
PSPPPAM Group settings (advanced)
| PSPPPAM Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| ResetTime | 0.000 – 60.000 | s | 0.001 | 5.000 | Time without slip to reset all signals |
PSPPPAM Non group settings (basic)
| PSPPPAM Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| MeasureMode | PosSeq L1L2 L2L3 L3L1 |
– | – | PosSeq | Measuring mode (PosSeq, L1L2, L2L3, L3L1) |
| InvertCTcurr | No Yes |
– | – | No | Invert current direction |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups |
PSPPPAM Monitored data
| PSPPPAM Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| SFREQ | REAL | – | Hz | Slip frequency |
| SLIPZOHM | REAL | – | Ohm | Slip impedance in ohms |
| SLIPZPER | REAL | – | % | Slip impedance in percent of ZBase |
| UCOS | REAL | – | kV | UCosPhi voltage |
| UCOSPER | REAL | – | % | UCosPhi voltage in percent of UBase |
Logics & highlights
Movements in the impedance plain
Different generator quantities as function of the angle between the equivalent generators
Simplified logic diagram for pole slip protection PSPPPAM
