TGOV3
TGOV3 model
This article is incomplete, some sections must be written.
Context
This governor model appears under the name GovSteamFV3 in the Common Information Model for Dynamics - Standard Models (2012) (missing reference) and 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 |
|---|---|---|
| fastValving | a Boolean which, if true, initiates the fast valving | - |
| omegaPu | measured angular frequency | pu (base omegaNom) |
| omegaRefPu | reference angular frequency | pu (base omegaNom) |
| PmRefPu | reference mechanical power | pu (base PNomTurb) |
The output signal is PmPu, the mechanical power in pu (base PNomTurb).
Model parameters
| Parameter | Description | Units |
|---|---|---|
| K | Governor gain(reciprocal of droop) | pu |
| K1 | Fraction of HP shaft power after first boiler pass | - |
| K2 | Fraction of LP shaft power after first boiler pass | - |
| K3 | Fraction of HP shaft power after second boiler pass | - |
| PMaxPu | Maximum valve opening | pu (base PNomTurb) |
| PMinPu | Minimum valve opening | pu (base PNomTurb) |
| PrMaxPu | Maximum pressure in reheater | pu (base PNomTurb) |
| t1 | Governor lag time constant | s |
| t2 | Governor lead time constant | s |
| t3 | Valve positioner time constant | s |
| t4 | Inlet piping / steam bowl time constant | s |
| t5 | Time constant of second boiler pass (reheater) | s |
| t6 | Time constant of crossover of third boiler pass | s |
| tA | Time to close intercept valve | s |
| tB | Time until intercept valve starts to reopen | s |
| tC | Time until intercept valve is fully open | s |
| Uo | Maximum valve opening velocity | pu/s |
| Uc | Maximum valve closing velocity | pu/s |
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
- 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