OEL3C
Reviewers: Lampros Papangelis (CRESYM)
IEEE OEL3C model
Context
This overexcitation limiter model first appeared in the IEEE Std 421.5-2016 (of Electrical & Engineers, 2016).
Model use, assumptions, validity domain and limitations
This model is associated to one of the voltage regulators (types AC, DC, ST) defined by the IEEE Std 421.5-2016 (of Electrical & Engineers, 2016).
The model provides an overexcitation limiter signal for the purpose of summation : the overexcitation limiter signal is added to the stator voltage deviation from the reference, thus being taken into account in the calculation of the excitation voltage.
Model input and output
The input signal is either the generator field current (for static excitation systems) or the exciter field current (for rotating exciters), in pu.
The output signal is UOelPu, the overexcitation limiter voltage in pu (base UNom).
Model parameters
Parameter | Description | Unit | Value |
---|---|---|---|
ITfPu | OEL timed field current limiter pick up level | pu | 3.7 |
K1 | Exponent for OEL error calculation | - | 1 |
KOel | OEL gain | pu | 1 |
KpOel | OEL proportional gain | pu | 1 |
KScale | OEL input signal scaling factor | pu | - |
tF | OEL field current measurement time constant | s | 0.02 |
tOel | OEL integral time constant | s | 24 |
VOel1MaxPu | OEL integrator maximum output | pu (base UNom) | 0.66 |
VOel1MinPu | OEL integrator minimum output | pu (base UNom) | -1 |
VOel2MaxPu | OEL maximum output | pu (base UNom) | 0 |
VOel2MinPu | OEL minimum output | pu (base UNom) | -1 |
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 | 09/10/2024 |
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