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ePHASORSIM native library has the following PSS/e supported exciter models.

Exciter ESAC1A

Parameters 

Name

Description

Unit

Tr

 Regulator input filter time constant

s

Tb

 AVR lead-leg numerator time constant

s

Tc

 AVR lead-leg denominator time constant

 s

Ka

AVR filter gain

pu

Ta

 AVR filter time constant

s

Vamax

Maximum filter output

pu

Vamin

Minimum filter output

pu

Vrmax

Maximum voltage regulator output

pu

Vrmin

Minimum voltage regulator output

pu

Kf

Excitation control system stabilizer gain

pu

Tf

Excitation control system stabilizer time constant

pu

Te

Exciter time constant

s

Ke

Exciter constant related to self-excited field

pu

Kd

Demagnetizing factor

pu

Kc

Rectifier loading factor

pu

E1

Field voltage value 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Field voltage value 2

pu

SE2

Exciter Saturation factor at E2 

-

Exciter ESAC5A

 

Parameters 

Name

Description

Unit

Tr

Input filter time constant

s

Ka

Gain

pu

Ta

 Time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Kf

Rate feedback gain

pu

Te

Exciter time constant

s

Ke

Exciter field resistance line slope

pu

Tf1

Rate feebdack lag time constant

s

Tf2

Rate feebdack lag time constant

s

Tf3

Rate feebdack lead time constant

s

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

pu

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2 

pu

Exciter ESAC6A

 

Parameters 

Name

Description

Unit

Tr

 Filter time constant

s

Ka

Gain

pu

Ta

Time constant

s

Tk

Lag time constant=0

s

Tb

Time constant

s

Tc

Lead time constant

s

Vamax

Maximum controller output

pu

Vamin

Minimum controller output

pu

Vrmax

Maximum exciter output

pu

Vrmin

Minimum exciter output

pu

Te

Exciter time constant

s

Kh

Exciter field current limiter gain

pu

Tj

Field current limiter time constant

s

Th

Field current limiter time constant

s

Vfelim

Exciter field current limit reference

pu

Vhmax

Maximum field current limiter

pu

Kd

Exciter internal reactance

pu

Kc

Rectifier regulation factor

pu

Ke

Exciter field resistance constant

pu

E1

Field voltage value 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Field voltage value 2

pu

SE2

Exciter Saturation factor at E2

-

Exciter ESAC8B

 

Parameters 

Name

Description

Unit

Tr

Voltage transducer time constant

s

Kp

Voltage regulator proportional gain

pu

Ki

Voltage regulator integral gain

pu

Kd

Voltage regulator derivative gain

pu

Td

Voltage regulator derivative time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Ka

Amplifier gain

pu

Ta

Amplifier time constant

s

Te

Exciter field time constant

s

Ke

Exciter field proportional constant=0

pu

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

pu

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2 

pu

Exciter ESDC1A

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Ka

Gain

pu

Ta

Time constant

s

Tb

Lag time constant

s

Tc

Lead time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Ke

Exciter field resistance line slope

pu

Te

Exciter time constant

s

Kf

Rate feedback gain

pu

Tf1

Rate feedback time constant

s

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

pu

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2 

pu

Exciter ESDC2A

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Ka

Gain

pu

Ta

Time constant

s

Tb

Lag time constant

s

Tc

Lead time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Ke

Exciter field resistance line slope

pu

Te

Exciter time constant

s

Kf

Rate feedback gain

pu

Tf1

Rate feedback time constant

s

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

pu

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2 

pu

Exciter ESST1A

 

Parameters 

Name

Description

Unit

Uel

Under excitation limit 

pu

Vos


pu

Tr

Voltage transducer time constant

s

Vimax

Maximum error

pu

Vimin

Minimum error

pu

Ka

Gain

pu

Ta

Time constant

s

Tb

Lag time constant

s

Tb1

Lag time constant

s

Tc

Lead time constant

s

Tc1

Lead time constant

s

Vrmax

Excitation voltage upper limit

pu

Vrmin

Excitation voltage lower limit

pu

Kc

Excitation system regulation factor

pu

Kf

Rate feedback gain

pu

Tf

Rate feedback time constant

s

Vamax

Maximum control element output

pu

Vamin

Minimum control element output

pu

Ilr

Maximum field current

pu

Klr

Gain on field current limit

pu

Exciter ESST4B

 

Parameters 

Name

Description

Unit

Tr

Voltage transducer time constant

s

Kpr

AVR proportional gain

pu

Kir

AVR integral gain

pu

Vrmax

Maximum AVR output

pu

Vrmin

Minimum AVR output

pu

Ta

AVR Time constant

s

Kpm

Proportional gain of inner loop regulator

pu

Kim

Integral gain of inner loop regulator

pu

Vmmax

Maximum inner loop regulator output

pu

Vmmin

Minimum inner loop regulator output

pu

Kg

Inner loop feedback again

pu

Kp

Potential source gain

pu

Thetap

Phase angle of potential source

deg

Ki

Current source gain

pu

Vbmax

Maximum excitation voltage

pu

Kc

Exciter regulation factor

pu

Xl

Bar leakage reactance

pu

Exciter EXAC1

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Tb

Lag time constant

s

Tc

Lead time constant

s

Ka

AVR Gain

pu

Ta

AVR time constant

s

Te

Exciter time constant 

s

Kf

Rate feedback gain

pu

Tf

Rate feedback time constant

s

Kc

Rectifier regulation factor

pu

Kd

Exciter internal reactance

pu

Ke

Exciter field resistance constant

pu

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2

-

Vrmax

Maximum exciter control

pu

Vrmin

Minimum exciter control

pu

Exciter EXAC2

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Tb

Lag time constant

s

Tc

Lead time constant

s

Ka

AVR Gain

pu

Ta

AVR time constant

s

Vamax

Maximum output

pu

Vamin

Minimum output

pu

Kb

Exciter field current controller gain

pu

Kl

Exciter field current limiter gain

pu

Kh

Exciter field current feedback gain

pu

Te

Exciter time constant 

s

Kf

Rate feedback gain

pu

Tf

Rate feedback time constant

s

Kc

Rectifier regulation factor

pu

Kd

Exciter internal reactance

pu

Ke

Exciter field resistance constant

pu

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2

-

Vlr

Maximum exciter field voltage

pu

Vrmax

Maximum exciter control

pu

Vrmin

Minimum exciter control

pu

Exciter EXAC4

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Tb

Lag time constant

s

Tc

Lead time constant

s

Vimax

Maximum error 

pu

Vimin

Minimum error

pu

Ka

Gain

pu

Ta

Time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Kc

Excitation system regulataion 

pu


Exciter EXDC2

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Tb

Voltage regulator time constant

s

Tc

Voltage regulator time constant

s

Ka

Gain

pu

Ta

Time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Te

Exciter time constant 

s

Ke

Exciter field resistance line slope

pu

Kf

Rate feedback gain

pu

Tf1

Rate feedback lag time constant

s

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2

-

Exciter EXPIC1

 

Parameters 

Name

Description

Unit

Tr

Regulator input filter time constant

s

Kpr

Proportional controller gain

pu

Kir

Integral controller gain

pu

Vr1

Controller maximum limit

pu

Vr2

Controller minimum limit

pu

Tas

Voltage regulator time constant

s

Tas2

Voltage regulator time constant

s

Tas4

Voltage regulator time constant

s

Vrmax

Voltage maximum regulator output

pu

Vrmin

Voltage minimum regulator output

pu

Kf

Rate feedback gain

pu

Tf1

Rate feedback time constant

s

Tf2

Rate feedback time constant

s

Efdmax

Efd maximum output 

pu

Efdmin

Efd minimum output 

pu

Ke

Exciter constant related to self-excited field

pu

Te

Exciter time constant

s

Kp

Potential circuit real part gain

pu

Ki

Potential circuit imaginary part gain

pu

Kc

Rectifier loading factor 

pu

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2

-

Exciter EXST1

Parameters 

Name

Description

Unit

Tr

Regulator input filter time constant

s

Vimax

Maximum regulator input voltage

pu

Vimin

Minimum regulator input voltage

pu

Tb

AVR lead-lag denominator time constant

s

Tc

AVR lead-lag numerator time constant

s

Ka

AVR filter gain

pu

Ta

AVR filter time constant

s

Vrmax

Maximum voltage regulator output

pu

Vrmin

Minimum voltage regulator output

pu

Kf

Excitation control system stabilizer gain

pu

Tf

Excitation control system stabilizer time constant

s

Kc

Rectifier loading factor

pu

Exciter IEEET1

 

Parameters 

Name

Description

Unit

Tr

Regulator input filter time constant

s

Ka

Voltage regulator gain

pu

Ta

Voltage regulator time constant

s

Vrmax

Maximum voltage regulator output

pu

Vrmin

Minimum voltage regulator output

pu

Te

Exciter time constant 

s

Ke

Exciter constant related to self-excited field

pu

Kf

Excitation control system stabilizer gain

pu

Tf

Excitation control system stabilizer time constant

s

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2

-

Exciter IEEEX1

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Tb

Lag time constant

s

Tc

Lead time constant

s

Ka

Gain

pu

Ta

Time constant

s

Vrmax

Maximum controller output

pu

Vrmin

Minimum controller output

pu

Kf

Rate feedback gain

pu

Tf

Rate feedback time constant

s

Ke

Exciter field resistance line slope

pu

Te

Exciter time constant

s

E1

Excitation voltage at point 1

pu

SE1

Exciter Saturation factor at E1 

-

E2

Excitation voltage at point 2

pu

SE2

Exciter Saturation factor at E2

-

Exciter IVOEX

 

Parameters 

Name

Description

Unit

K1

Gain

pu

A1

Lead constant

pu

A2

Lag constant

pu

T1

Lead time constant

s

T2

Lag time constant

s

Max1

Maximum output

pu

Min1

Minimum output

pu

K3

Gain

pu

A3

Lead constant

pu

A4

Lag constant

pu

T3

Lead time constant

s

T4

Lag time constant

s

Max3

Maximum output

pu

Min3

Minimum output

pu

K5

Gain

pu

A5

Lead constant

pu

A6

Lag constant

pu

T5

Lead time constant

s

T6

Lag time constant

s

Max5

Maximum output

pu

Min5

Minimum output

pu

Exciter SCRX

 

Parameters 

Name

Description

Unit

Ta/Tb

Gain reduction ratio 

-

Tb

Time constant

s

K

Exciter Gain

pu

Te

Time constant

s

Emax

Maximum field voltage output

pu

Emin

Minimum field voltage output

pu

Cswitch

Voltage source switch – Bus fed = 0, Solid fed = 1.

-

Rc/Rfd

Ratio of the crowbar resistance to field winding resistance Rc/Rfd

-

Exciter SEXS

 

Parameters 

Name

Description

Unit

Ta

Lead time constant of transient filter

s

Tb

Lag time constant of transient filter 

s

K

Exciter Gain

pu

Te

Lag time constant of exciter

s

Emax

Maximum field voltage limit

pu

Emin

Minimum field voltage limit

pu

Exciter URST5T

 

Parameters 

Name

Description

Unit

Tr

Filter time constant

s

Tc1

Regulator time constant

s

Tb1

Regulator time constant

s

Tc2

Regulator time constant

s

Tb2

Regulator time constant

s

Kr

Regulator gain

pu

Vrmax

Maximum voltage regulator output

pu

Vrmin

Minimum voltage regulator output

pu

T1

Regulator time constant

s

Kc

Rectifier regulation factor

pu

Available I/O Pins

No

Pin Description

Pin Type

Value/Unit

Instruction

1

Get initial voltage reference

O

p.u.

exciterID/Vref0

2

Set/Get voltage reference increment

I/O

p.u.

exciterID/pins/dVref

3Get exciter output EfdOp.u.exciterID/pins/Efd

Example

See the Exciter page in phasor01_IEEE39.xlsx file in demo PHASOR-01.

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