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ePHASORSIM native library have the following PSS/e supported Turbine and Governor models.

Turbine-Governor DEGOV

Turbine-Governor GAST

Name	Description	Unit
R	Permanent droop	pu
T1	Governor mechanism time constant	s
T2	Turbine power time constant	s
T3	Turbine exhaust temperature time constant	s
At	Ambient temperature load limit	pu
Kt	Temperature limiter gain	pu
Vmax	Maximum turbine power	pu
Vmin	Minimum turbine power	pu
Dturb	Turbine damping factor	pu

Name	Description	Unit
Rselect	Feedback signal for droop	-
Flag	Switch for fuel source characteristic	-
R	Permanent droop	pu
Tpelec	Electrical power transducer time constant	s
Maxerr	Maximum value for speed error signal	pu
Minerr	Minimum value for speed error signal	pu
Kpgov	Governor proportional gain	pu
Kigov	Governor integral gain	pu
Kdgov	Governor derivative gain	pu
Tdgov	Governor derivative time constant	s
Vmax	Maximum valve position limit	pu
Vmin	Minimum valve position limit	pu
Tact	Actuator time constant	s
Kturb	Turbine gain	pu
Wfnl	No load fuel flow	pu
Tb	Turbine lag time constant	s
Tc	Turbine lead time constant	s
Teng	Transport time delay for diesel engine	s
Tfload	Load limiter time constant	s
Kpload	Load limiter proportional gain	pu
Kiload	Load limiter integral gain	pu
Ldref	Load limiter reference value	pu
Dm	Speed sensivity coeficient	pu
Ropen	Maximum valve opening rate	pu
Rclose	Minimum valve opening rate	pu
Kimw	Power controller gain	pu
Aset	Acceleration limiter setpoint	pu
Ka	Acceleration limiter gain	pu
Ta	Acceleration limiter time constant	s
Trate	Base for power values	MW
Db	Speed governor deadband	pu
Tsa	Temperature detection lead time constant	s
Tsb	Temperature detection lag time constant
Rup	Maximum rate of load limit increase	pu
Rdown	Maximum rate of load limit decrease	pu

Name	Description	Unit
K	Governor gain	pu
T1	Governor lag time constant	s
T2	Governor lead time constant	s
T3	Valve positioner time constant	s
Uo	Maximum valve opening velocity	pu
Uc	Maximum valve closing velocity	pu
Pmax	Maximum valve opening	pu
Pmin	Minimum valve opening	pu
T4	Inlet/piping steam bowl time constant	s
K1	Fraction of HP shaft power after first boiler pass	pu
K2	Fraction of LP shaft power after first boiler pass	pu
T5	Time constant of second boiler pass	s
K3	Fraction of HP shaft power after second boiler pass	pu
K4	Fraction of LP shaft power after second boiler pass	pu
T6	Time constant of third boiler pass	s
K5	Fraction of HP shaft power after third boiler pass	pu
K6	Fraction of LP shaft power after third boiler pass	pu
T7	Time constant of fourth boiler pass	s
K7	Fraction of HP shaft power after fourth boiler pass	pu
K8	Fraction of LP shaft power after fourth boiler pass	pu

Name	Description	Unit
T1	Controller lag	s
T2	Controller lead compensation	s
T3	Governor lag	s
T4	Delay due to steam inlet volumes associated with steam chest and inlet piping	s
T5	Reheater delay including hot and cold leads	s
T6	Delay due to IP-LP turbine, crossover pipes and LP end hoods	s
K1	Regulation	s
K2	Fraction	pu
K3	Fraction	pu
Pmax	Upper lower limit	pu
Pmin	Lower power limit	pu

Name	Description	Unit
K	Governor Gain	pu
T1	Governor lead time constant	s
T2	Governor lag time constant	s
T3	Valve positioner time constant	s
Uo	Maximum valve opening velocity	pu
Uc	Maximum valve closing velocity	pu
Pmax	Maximum valve opening	pu
Pmin	Minimum valve opening	pu
T4	Inlet piping/steam bowl time constant	s
T5	Time constant of second boiler pass	s
Prmax	Max pressure in reheater	pu
T6	Time constant of crossover or third boiler pass	s
K1	Fraction of turbine power developed after first boiler pass	pu
K2	Fraction of turbine power developed after second boiler pass	pu
K3	Fraction of turbine power developed after crossover or third boiler pass	pu
Ta	Valve position at time 2	s
Tb	Valve position at time 3	s
Tc	Valve position at time 4	s

Name	Description	Unit
dB1	Intentional dead-band width	pu
dB2	Unintentional dead-band	pu
err	Intentional db hysteresis	pu
Td	Input filter time constant	s
K1	Single derivative gain	pu
Kd	Double derivative gain	pu
Tf	Washout time constant	s
Kp	Integral gain	pu
R	Steady state droop	pu
Tt	Power feedback time constant	s
Kg	Gate servo gain	pu
Tp	Gate servo time constant	s
VELopen	Max gate opening velocity	pu
VELclose	Max gate closing velocity	pu
Pmax	Maximum gate opening	pu
Pmin	Minimum gate opening	pu
Gv1	Nonlinear gain point 1	pu
PGv1	Nonlinear gain point 1	pu
Gv2	Nonlinear gain point 2	pu
PGv2	Nonlinear gain point 2	pu
Gv3	Nonlinear gain point 3	pu
PGv3	Nonlinear gain point 3	pu
Gv4	Nonlinear gain point 4	pu
PGv4	Nonlinear gain point 4	s
Gv5	Nonlinear gain point 5	s
PGv5	Nonlinear gain point 5	s
Aturb	Turbine numerator multiplier	pu
Bturb	Turbine denominator multiplier	pu
Tturb	Turbine time constant	s
Trate	Turbine rate	pu

Name	Description	Unit
dB1	Intentional dead-band width	pu
dB2	Unintentional dead-band	pu
err	Intentional db hysteresis	pu
Td	Input filter time constant	s
Kp	Proportional gain	pu
Ki	Integral gain	pu
Kd	Derivative gain	pu
Tf	Washout time constant	s
R	Steady state droop	pu
Tt	Power feedback time constant	s
Kg	Gate servo gain	pu
Tp	Gate servo time constant	s
VELopen	Max gate opening velocity	pu
VELclose	Max gate closing velocity	pu
Pmax	Maximum gate opening	pu
Pmin	Minimum gate opening	pu
Gv1	Nonlinear gain point 1	pu
PGv1	Nonlinear gain point 1	pu
Gv2	Nonlinear gain point 2	pu
PGv2	Nonlinear gain point 2	pu
Gv3	Nonlinear gain point 3	pu
PGv3	Nonlinear gain point 3	pu
Gv4	Nonlinear gain point 4	pu
PGv4	Nonlinear gain point 4	s
Gv5	Nonlinear gain point 5	s
PGv5	Nonlinear gain point 5	s
Aturb	Turbine numerator multiplier	pu
Bturb	Turbine denominator multiplier	pu
Tturb	Turbine time constant	s
Trate	Turbine rate	pu

No	Pin Description	Pin Type	Value/Unit	Instruction
1	Get initial governor reference	O	p.u.	turbineID/Gref0
2	Set/Get governor reference increment	I/O	p.u.	turbineID/pins/dGref
3	Get governor output Pmech	O	p.u.	turbineID/pins/Pmech

See the Turbine and Governor page in phasor01_IEEE39.xlsx file in demo PHASOR-01.