Generator Relay Model: GP3
AutoCorrection PropertiesThis model represents a combination of the generic generator protection relay models GP1 and GP2. This model represent the generator protection for over and under voltage, over and under frequency, reverse power and stator and field over current.
The model followed the specifications develop by NERC and the attached pdf present the NERC GP3 Generic Protection Model for Generator specification. The model is coded exactly as presented in the NERC specificqations.
Model Equations and/or Block Diagrams
Parameters:
| flag1 | 0 = alarm only, 1 = trip generator |
| flag2 | 1 = monitor generator, 2 = monitor all generators in areas, 3 = monitor all generator in zone, 4 = monitor all generators in the entire case |
| vhz | V/Hz trip setting (pu) |
| tvhz | Definite time trip for V/Hz (s) |
| vuv | Under-voltage trip setting (pu) |
| tvuv | Definite time trip for UV (s) |
| vov | Over-voltage trip setting (pu) |
| tvov | Definite time trip for OV (s) |
| pmtr | Reverse power trip setting (pu) |
| tpmr | Definite time trip on reverse power (s) |
| Xz1 | Loss of field Zone 1 impedance (pu) |
| Xz2 | Loss of field Zone 2 impedance (pu)) |
| Xoff | Loss of field impedance off set (pu)) |
| tz1 | Definite time trip for Zone 1 of LOF (s) |
| tz2 | Definite time trip for Zone 2 of LOF (s) |
| ioc | Stator Over current trip pickup setting (pu) |
| koc | Time factor for over current trip (s) |
| boc | Time coefficient for over current trip (s) |
| poc | Exponent for inverse time |
| troc | Reset time for over current relay (s) |
| fof | Over speed trip setting (pu) |
| tof | Definite time trip for OF (s) |
| fuf | Under speed trip setting (pu) |
| tuf | Definite time trip for UF (s) |
| delp | Delta power imbalance for Power/Load Unbalance Relay (pu) |
| tdelp | Definite time trip for Power/Load Unbalance Relay (s) |
| ifoc | Over excitation trip setting (pu) |
| tfoc | Definite time trip for over excitation (s) |