PSS6C
PSS6C model
This article is incomplete, some sections must be written.
Context
This power system stabilizer model first appeared in the IEEE Std 421.5-2016 (of Electrical & Engineers, 2016). It has been reproduced identically in the IEC 61970-302:2024 version (Commission, 2024).
Model use, assumptions, validity domain and limitations
To be completed
Model inputs and output
The input variables are :
| Variable | Description | Units |
|---|---|---|
| omegaPu | measured angular frequency | pu (base omegaNom) |
| omegaRefPu | reference angular frequency | pu (base omegaNom) |
| PGenPu | active power | pu (base SnRef) |
The output signal is VPssPu in pu (base UNom).
Model parameters
| Parameter | Description | Units |
|---|---|---|
| KOmega | Coefficient applied to angular frequency | - |
| KOmegaRef | Coefficient applied to reference angular frequency | - |
| K0 | Gain of first integrator input | pu |
| K1 | Gain of first integrator output | pu |
| K2 | Gain of second integrator output | pu |
| K3 | Gain of third integrator output | pu |
| K4 | Gain of fourth integrator output | pu |
| Ki3 | Gain of third integrator | pu |
| Ki4 | Gain of fourth integrator | pu |
| Ks | Gain of power system stabilizer | pu |
| Ks1 | Gain of active power branch | pu |
| Ks2 | Gain of angular frequency branch | pu |
| MAcc | Gain of angular velocity | pu |
| OmegaMaxPu | Maximum angular velocity | pu (base omegaNom) |
| OmegaMinPu | Minimum angular velocity | pu (base omegaNom) |
| PGenMaxPu | Maximum active power | pu (base SNom) (generator convention) |
| PGenMinPu | Minimum active power | pu (base SNom) (generator convention) |
| PPssOffPu | Lower active power threshold for PSS activation | pu (base SNom) (generator convention) |
| PPssOnPu | Higher active power threshold for PSS activation | pu (base SNom) (generator convention) |
| t1 | Transducer time constant (active power branch) | s |
| t2 | Transducer time constant (angular frequency branch) | s |
| t3 | First order time constant (active power branch) | s |
| t4 | Derivative time constant (angular frequency branch) | s |
| tD | Washout time constant | s |
| tI1 | Time constant of first integrator, | s |
| tI2 | Time constant of second integrator, | s |
| tI3 | Time constant of third integrator, | s |
| tI4 | Time constant of fourth integrator, | s |
| VPssMaxPu | Maximum output voltage of power system stabilizer | pu (base UNom) |
| VPssMinPu | Minimum output voltage of power system stabilizer | pu (base UNom) |
| SNom | Nominal apparent power | MVA |
Model diagram
Open source implementations
This model has been successfully implemented in :
| Software | URL | Language | Open-Source License | Last consulted date | Comments |
|---|---|---|---|---|---|
| Dynawo | Link | Modelica | MPL v2.0 | 24/05/2024 |
References
- of Electrical, T. I., & Engineers, E. (2016). IEEE recommended practice for excitation system models for power system stability studies . IEEE Std 421.5-2016. https://home.engineering.iastate.edu/ jdm/ee554/IEEEstd421.5-2016RecPracExSysModsPwrSysStabStudies.pdf
- Commission, I. E. (2024). Energy management system application program interface (EMS-API) Part 302: Common information model (CIM) dynamics. IEC 61970-302. https://webstore.iec.ch/preview/info_iec61970-302%7Bed2.0%7Db.pdf