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

Turbine-Governor GAST

 

Parameters 

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

Turbine-Governor GGOV1

 

Parameters 

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

Turbine-Governor HYGOV

 

Parameters 

Name

Description

Unit

R

Permanent droop 

pu

r

Temporary droop

pu

Tr

Governor time constant

 s

Tf

Filter time constant

s

Tg

Servo time constant 

s

Velm

Gate velocity limit

pu

Gmax

Maximum gate limit

pu

Gmin

Minimum gate limit

pu

Tw

Water inertia time constant

s

At

Turbine gain

pu

Dturb

Turbine damping factor

pu

qNL

No-load flow

pu


Turbine-Governor IEEEG1

 

Parameters 

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

Turbine-Governor IEEEG2

Parameters 

Name

Description

Unit

K

Governor gain

 pu

T1

Governor lag time constant

s

T2

Governor lead time constant

s

T3

Gate actuator time constant 

s

Pmax

Gate maximum

pu

Pmin

Gate minimum 

pu

T4

Water starting time 

s

Turbine-Governor IEESGO

 

Parameters 

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

Turbine-Governor TGOV1

Parameters 

Name

Description

Unit

R

Permanent droop

 pu

T1

Steam bowl time constant

s

Vmax

Maximum valve position

pu

Vmin

Minimum valve position

pu

T2

Time constant

s

T3

Time constant

s

Dt

Turbine damping coeficient

pu

Available I/O Pins

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

3Get governor output PmechOp.u.turbineID/pins/Pmech

Example

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

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