IEEX2A

This article is incomplete, some sections must be written.

Context

To be completed

Model use, assumptions, validity domain and limitations

To be completed

Model inputs and output

The input variables are :

Variable	Description	Units
\(U_s P_u\)	measured stator voltage	\({pu}\) (base \(U_{Nom}\))
\(U_{s} R_{ef} P_u\)	reference stator voltage	\({pu}\) (base \(U_{Nom}\))
\(U O_{el} P_u\) (optional)	output voltage of overexcitation limiter	\({pu}\) (base \(U N_{om}\))
\(U P_{ss} P_u\) (optional)	output voltage of power system stabilizer	\({pu}\) (base \(U N_{om}\))
\(U U_{el} P_u\) (optional)	output voltage of underexcitation limiter	\({pu}\) (base \(U N_{om}\))

The output signal is \(E_{fd} P_u\), the excitation voltage in \({pu}\) (user-selected base voltage).

Model parameters

Parameter	Description	Units
\(A_{Ex}\)	Gain of saturation function	\({pu}\)
\(B_{Ex}\)	Exponential coefficient of saturation function	\(-\)
\(E_{fd} Min P_u\)	Minimum excitation voltage	\({pu}\) (user-selected base voltage)
\(K_a\)	Voltage regulator gain	\({pu}\)
\(K_e\)	Exciter field proportional constant	\({pu}\)
\(K_f\)	Exciter rate feedback gain	\({pu}\)
\(t_A\)	Voltage regulator time constant	\({s}\)
\(t_B\)	Voltage regulator lag time constant	\({s}\)
\(t_C\)	Voltage regulator lead time constant	\({s}\)
\(t_E\)	Exciter field time constant	\({s}\)
\(t_{F1}\)	Feedback lead time constant	\({s}\)
\(t_R\)	Stator voltage filter time constant	\({s}\)
\(V_{r} Max P_u\)	Maximum field voltage	\({pu}\) (user-selected base voltage)
\(V_{r} Min P_u\)	Minimum field voltage	\({pu}\) (user-selected base voltage)

Model diagram

Figure 1: IEEX2A block 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