: Public Class
Created: 03/02/2012 09:15:51
Modified: 23/04/2012 09:25:01
Project:
Advanced:
The class represents IEEE Std 421.5-2005 type DC3A model. This model represents represent older systems, in particular those dc commutator exciters with non-continuously acting regulators that were commonly used before the development of the continuously acting varieties.  These systems respond at basically two different rates, depending upon the magnitude of voltage error. For small errors, adjustment is made periodically with a signal to a motor-operated rheostat. Larger errors cause resistors to be quickly shorted or inserted and a strong forcing signal applied to the exciter. Continuous motion of the motor-operated rheostat occurs for these larger error signals, even though it is bypassed by contactor action.<br/><br/><br/>Reference: IEEE Standard 421.5-2005 Section 5.3. <br/>
Attribute
Public PU
  efd1
Details:
Notes: Exciter voltage at which exciter saturation is defined (E<sub>FD1</sub>).  Typical Value = 3.375.<br/>
Public PU
  efd2
Details:
Notes: Exciter voltage at which exciter saturation is defined (E<sub>FD2</sub>).  Typical Value = 3.15.<br/>
Public Boolean
  exclim
Details:
Notes: (exclim).  IEEE standard is ambiguous about lower limit on exciter output.<br/>true = a lower limit of zero is applied to integrator output<br/>false = a lower limit of zero is not applied to integrator output.<br/>Typical Value = true.<br/>
Public PU
  ke
Details:
Notes: Exciter constant related to self-excited field (K<sub>E</sub>).  Typical Value = 0.05.<br/>
Public PU
  kv
Details:
Notes: Fast raise/lower contact setting (K<sub>V</sub>).  Typical Value = 0.05.<br/>
Public Float
  seefd1
Details:
Notes: Exciter saturation function value at the corresponding exciter voltage, E<sub>FD1</sub> (S<sub>E</sub>[E<sub>FD1</sub>]).  Typical Value = 0.267.<br/>
Public Float
  seefd2
Details:
Notes: Exciter saturation function value at the corresponding exciter voltage, E<sub>FD2</sub> (S<sub>E</sub>[E<sub>FD2</sub>]).  Typical Value = 0.068.<br/>
Public Seconds
  te
Details:
Notes: Exciter time constant, integration rate associated with exciter control (T<sub>E</sub>).  Typical Value = 0.5.<br/>
Public Seconds
  trh
Details:
Notes: Rheostat travel time (T<sub>RH</sub>).  Typical Value = 20.<br/>
Public PU
  vrmax
Details:
Notes: Maximum voltage regulator output (V<sub>RMAX</sub>).  Typical Value = 1.<br/>
Public PU
  vrmin
Details:
Notes: Minimum voltage regulator output (V<sub>RMIN</sub>).  Typical Value = 0.<br/>
Object Type Connection Direction Notes
ExcitationSystemDynamics Class Generalization To