PSS3C
PSS3C 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). In the previous standard version (2005), its predecessor model was called PSS3B. Compared to PSS3B, PSS3C has an additional output logic.
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 |
|---|---|---|
| A1 | First numerator coefficient of first notch filter | s |
| A2 | Second numerator coefficient of first notch filter | \(s ^ 2\) |
| A3 | First denominator coefficient of first notch filter | s |
| A4 | Second denominator coefficient of first notch filter | \(s ^ 2\) |
| A5 | First numerator coefficient of second notch filter | s |
| A6 | Second numerator coefficient of second notch filter | \(s ^ 2\) |
| A7 | First denominator coefficient of second notch filter | s |
| A8 | Second denominator coefficient of second notch filter | \(s ^ 2\) |
| KOmega | Coefficient applied to angular frequency | - |
| KOmegaRef | Coefficient applied to reference angular frequency | - |
| Ks1 | Gain of active power branch | pu |
| Ks2 | Gain of angular frequency branch | pu |
| t1 | Transducer time constant (active power branch) | s |
| t2 | Transducer time constant (angular frequency branch) | s |
| tW1 | Washout time constant (active power branch) | s |
| tW2 | Washout time constant (angular frequency branch) | s |
| tW3 | Washout time constant (main branch) | s |
| VPssMaxPu | Maximum voltage output of power system stabilizer | pu (base UNom) |
| VPssMinPu | Minimum voltage output of power system stabilizer | pu (base UNom) |
| SNom | Nominal apparent power | MVA |
Model diagram
Model variant
In the PSS3B model, the PSS deactivation for low active power values is absent \(PPssOffPu = -1000, PPssOnPu = -999\).
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