Modelling of Excitation Systems

1. Modelling of Excitation
System Components

2. Block diagram of Synchronous Gen. Excitation System

3. Excitation System Control and
Protection Circuits

5. a) Separately excited dc exciter
EX - depends on speed and winding
configuration of exciter armature.
EX – non linear function of Ief due to
magnetic saturation.
Ex – also affected by the load on the exciter

6. • Air gap line – tangent to the lower linear
portion of the open circuit saturation
curve
• Rg – slope of air gap line
• Δief – departure of the load saturation
curve from the air gap line

12. b) Self excited dc exciter

13. c) AC exciters and rectifiers

16. d) Amplifiers

17. e) Excitation system stabilizing circuit

19. f) Windup and non-windup limits

24. g) Gating Functions

25. h) Terminal voltage transduces and load compensator model

26. Modelling of complete excitation systems

27. Type DC1A Excitation Model

28. Type DC1 Excitation Model

29. Type AC1A Excitation Model

30. Type AC4A Excitation Model

31. Type ST1A Excitation Model

32. Type ST2A Excitation Model