: Public Class
Created: 03/02/2012 11:41:13
Modified: 05/08/2012 08:08:42
Project:
Advanced:
The class represents IEEE Std 421.5-2005 type ST7B model. This model is representative of static potential-source excitation systems. In this system, the AVR consists of a PI voltage regulator. A phase lead-lag filter in series allows introduction of a derivative function, typically used with brushless excitation systems. In that case, the regulator is of the PID type. In addition, the terminal voltage channel includes a phase lead-lag filter.  The AVR includes the appropriate inputs on its reference for overexcitation limiter (OEL1), underexcitation limiter (UEL), stator current limiter (SCL), and current compensator (DROOP). All these limitations, when they work at voltage reference level, keep the PSS (VS signal from Type PSS1A, PSS2A, or PSS2B) in operation. However, the UEL limitation can also be transferred to the high value (HV) gate acting on the output signal. In addition, the output signal passes through a low value (LV) gate for a ceiling overexcitation limiter (OEL2).<br/><br/>Reference: IEEE Standard 421.5-2005 Section 7.7. <br/>
Attribute
Public PU
  kh
Details:
Notes: High-value gate feedback gain (K<sub>H</sub>).  Typical Value 1.<br/>
Public PU
  kia
Details:
Notes: Voltage regulator integral gain (K<sub>IA</sub>).  Typical Value = 1.<br/>
Public PU
  kl
Details:
Notes: Low-value gate feedback gain (K<sub>L</sub>).  Typical Value 1.<br/>
Public PU
  kpa
Details:
Notes: Voltage regulator proportional gain (K<sub>PA</sub>).  Typical Value = 40.<br/>
Public ExcST7BOELselectorKind
  oelin
Details:
Notes: OEL input selector (OELin). Typical Value = noOELinput.<br/>
Public Seconds
  tb
Details:
Notes: Regulator lag time constant (T<sub>B</sub>).  Typical Value 1.<br/>
Public Seconds
  tc
Details:
Notes: Regulator lead time constant (T<sub>C</sub>).  Typical Value 1.<br/>
Public Seconds
  tf
Details:
Notes: Excitation control system stabilizer time constant (T<sub>F</sub>).  Typical Value 1.<br/>
Public Seconds
  tg
Details:
Notes: Feedback time constant of inner loop field voltage regulator (T<sub>G</sub>). Typical Value 1.<br/>
Public Seconds
  tia
Details:
Notes: Feedback time constant (T<sub>IA</sub>).  Typical Value = 3.<br/>
Public ExcST7BUELselectorKind
  uelin
Details:
Notes: UEL input selector (UELin). Typical Value = noUELinput.<br/>
Public PU
  vmax
Details:
Notes: Maximum voltage reference signal (V<sub>MAX</sub>).  Typical Value = 1.1.<br/>
Public PU
  vmin
Details:
Notes: Minimum voltage reference signal (V<sub>MIN</sub>).  Typical Value = 0.9.<br/>
Public PU
  vrmax
Details:
Notes: Maximum voltage regulator output (V<sub>RMAX</sub>).  Typical Value = 5.<br/>
Public PU
  vrmin
Details:
Notes: Minimum voltage regulator output (V<sub>RMIN</sub>).  Typical Value = -4.5.<br/>
Object Type Connection Direction Notes
ExcitationSystemDynamics Class Generalization To