: Public Class
Created: 07/05/2009 15:08:11
Modified: 18/05/2014 21:51:35
Project:
Advanced:
General model for any prime mover with a PID governor, used primarily for combustion turbine and combined cycle units.<br/>This model can be used to represent a variety of prime movers controlled by PID governors.  It is suitable, for example, for representation of <br/><ul>
<li>gas turbine and single shaft combined cycle turbines </li></ul>
<ul>
<li>diesel engines with modern electronic or digital governors  </li></ul>
<ul>
<li>steam turbines where steam is supplied from a large boiler drum or a large header whose pressure is substantially constant over the period under study </li><li>simple hydro turbines in dam configurations where the water column length is short and water inertia effects are minimal. </li></ul>
Additional information on this model is available in the 2012 IEEE report, <i><u>Dynamic Models for Turbine-Governors in Power System Studies</u></i>, section 3.1.2.3 page 3-4 (GGOV1).<br/>
Attribute
Public Float
  aset
Details:
Notes: Acceleration limiter setpoint (Aset).  Unit = PU/sec.  Typical Value = 0.01.<br/>
Public PU
  db
Details:
Notes: Speed governor dead band in per unit speed (db).  In the majority of applications, it is recommended that this value be set to zero.  Typical Value = 0.<br/>
Public PU
  dm
Details:
Notes: Speed sensitivity coefficient (Dm).  Dm can represent either the variation of the engine power with the shaft speed or the variation of maximum power capability with shaft speed.  If it is positive it describes the falling slope of the engine speed verses power characteristic as speed increases. A slightly falling characteristic is typical for reciprocating engines and some aero-derivative turbines.  If it is negative the engine power is assumed to be unaffected by the shaft speed, but the maximum permissible fuel flow is taken to fall with falling shaft speed. This is characteristic of single-shaft industrial turbines due to exhaust temperature limits.  Typical Value = 0.<br/>
Public PU
  ka
Details:
Notes: Acceleration limiter gain (Ka).  Typical Value = 10.<br/>
Public PU
  kdgov
Details:
Notes: Governor derivative gain (Kdgov).  Typical Value = 0.<br/>
Public PU
  kigov
Details:
Notes: Governor integral gain (Kigov).  Typical Value = 2.<br/>
Public PU
  kiload
Details:
Notes: Load limiter integral gain for PI controller (Kiload).  Typical Value = 0.67.<br/>
Public PU
  kimw
Details:
Notes: Power controller (reset) gain (Kimw).  The default value of 0.01 corresponds to a reset time of 100 seconds.  A value of 0.001 corresponds to a relatively slow acting load controller.  Typical Value = 0.01.<br/>
Public PU
  kpgov
Details:
Notes: Governor proportional gain (Kpgov).  Typical Value = 10.<br/>
Public PU
  kpload
Details:
Notes: Load limiter proportional gain for PI controller (Kpload).  Typical Value = 2.<br/>
Public PU
  kturb
Details:
Notes: Turbine gain (Kturb) (#gt;0).  Typical Value = 1.5.<br/>
Public PU
  ldref
Details:
Notes: Load limiter reference value (Ldref).  Typical Value = 1.<br/>
Public PU
  maxerr
Details:
Notes: Maximum value for speed error signal (maxerr).  Typical Value = 0.05.<br/>
Public PU
  minerr
Details:
Notes: Minimum value for speed error signal (minerr).  Typical Value = -0.05.<br/>
Public ActivePower
  mwbase
Details:
Notes: Base for power values (MWbase) (#gt; 0).  Unit = MW.<br/>
Public PU
  r
Details:
Notes: Permanent droop (R).  Typical Value = 0.04.<br/>
Public Float
  rclose
Details:
Notes: Minimum valve closing rate (Rclose).  Unit = PU/sec.  Typical Value = -0.1.<br/>
Public PU
  rdown
Details:
Notes: Maximum rate of load limit decrease (Rdown).  Typical Value = -99.<br/>
Public Float
  ropen
Details:
Notes: Maximum valve opening rate (Ropen).  Unit = PU/sec.  Typical Value = 0.10.<br/>
Public DroopSignalFeedbackKind
  rselect
Details:
Notes: Feedback signal for droop (Rselect).  Typical Value = electricalPower.<br/>
Public PU
  rup
Details:
Notes: Maximum rate of load limit increase (Rup).  Typical Value = 99.<br/>
Public Seconds
  ta
Details:
Notes: Acceleration limiter time constant (Ta) (#gt;0).  Typical Value = 0.1.<br/>
Public Seconds
  tact
Details:
Notes: Actuator time constant (Tact).  Typical Value = 0.5.<br/>
Public Seconds
  tb
Details:
Notes: Turbine lag time constant (Tb) (#gt;0).  Typical Value = 0.5.<br/>
Public Seconds
  tc
Details:
Notes: Turbine lead time constant (Tc).  Typical Value = 0.<br/>
Public Seconds
  tdgov
Details:
Notes: Governor derivative controller time constant (Tdgov).  Typical Value = 1.<br/>
Public Seconds
  teng
Details:
Notes: Transport time delay for diesel engine used in representing diesel engines where there is a small but measurable transport delay between a change in fuel flow setting and the development of torque (Teng).  Teng should be zero in all but special cases where this transport delay is of particular concern.  Typical Value = 0.<br/>
Public Seconds
  tfload
Details:
Notes: Load Limiter time constant (Tfload) (#gt;0).  Typical Value = 3.<br/>
Public Seconds
  tpelec
Details:
Notes: Electrical power transducer time constant (Tpelec) (#gt;0).  Typical Value = 1.<br/>
Public Seconds
  tsa
Details:
Notes: Temperature detection lead time constant (Tsa).  Typical Value = 4.<br/>
Public Seconds
  tsb
Details:
Notes: Temperature detection lag time constant (Tsb).  Typical Value = 5.<br/>
Public PU
  vmax
Details:
Notes: Maximum valve position limit (Vmax).  Typical Value = 1.<br/>
Public PU
  vmin
Details:
Notes: Minimum valve position limit (Vmin).  Typical Value = 0.15.<br/>
Public PU
  wfnl
Details:
Notes: No load fuel flow (Wfnl).  Typical Value = 0.2.<br/>
Public Boolean
  wfspd
Details:
Notes: Switch for fuel source characteristic to recognize that fuel flow, for a given fuel valve stroke, can be proportional to engine speed (Wfspd).<br/>true = fuel flow proportional to speed (for some gas turbines and diesel engines with positive displacement fuel injectors)<br/>false = fuel control system keeps fuel flow independent of engine speed.<br/>Typical Value = true.<br/>
Object Type Connection Direction Notes
TurbineGovernorDynamics Class Generalization To