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Turbine and Governor
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ePHASORSIM native library have the following PSS/e supported Turbine and Governor models.
Turbine-Governor DEGOV
Parameters
Name | Description | Unit |
T1 | Time constant | s |
T2 | Time constant | s |
T3 | Time constant | s |
K | Turbine gain | pu |
T4 | Time constant | s |
T5 | Time constant | s |
T6 | Time constant | s |
Td | Time delay | s |
Tmax | Maximum limit | pu |
Tmin | Minimum limit | pu |
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 |
Turbine-Governor TGOV3
Parameters
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 |
Turbine-Governor WSHYDD
Parameters
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 |
Turbine-Governor WSHYGP
Parameters
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 |
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 |
3 | Get governor output Pmech | O | p.u. | turbineID/pins/Pmech |
Example
See the Turbine and Governor page in phasor01_IEEE39.xlsx file in demo PHASOR-01.
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