SCRX

Authors: Erwan Guichard (DPS for RTE)

Reviewers: Mathilde Bongrain (CRESYM)

SCRX model

This article is incomplete, some sections must be written.

Context

This voltage regulator model appears under the name ExcSCRX 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
IrPu rotor current pu (base SNom, user-selected base voltage)
UsPu measured stator voltage pu (base UNom)
UsRefPu reference stator voltage pu (base UNom)
UOelPu (optional) output voltage of overexcitation limiter pu (base UNom)
UPssPu (optional) output voltage of power system stabilizer pu (base UNom)
UUelPu (optional) output voltage of underexcitation limiter pu (base UNom)

The output signal is EfdPu, the excitation voltage in pu (user-selected base voltage).

Model parameters

Parameter Description Units
CSwitch If true, exciter is solid-fed, if false, exciter is bus-fed -
IrThresholdOn If true, rotor current threshold applies -
K Voltage regulator gain pu
RcToRfd Ratio of field discharge resistance to field winding resistance -
tA Transient gain reduction lead time constant s
tB Transient gain reduction lag time constant s
tE Voltage regulator time constant s
VrMaxPu Maximum output voltage of voltage regulator pu (user-selected base voltage)
VrMinPu Minimum output voltage of voltage regulator pu (user-selected base voltage)

Model diagram

SCRX

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

  1. 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
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