Power System Stability and Control MCQs

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1. Which of the following phenomena can lead to power system instability?





2. The swing equation in power system stability analysis describes the dynamics of:





3. The critical clearing angle in a power system is related to:





4. The main objective of power system stabilizers (PSS) is to:





5. Damping torque in a synchronous generator helps in:





6. The transient stability of a power system is primarily affected by:





7. An under-excited synchronous generator:





8. The time interval between fault occurrence and the instant when the fault is cleared is crucial for:





9. In a power system stabilizer (PSS), the signal used for control is typically derived from:





10. The angle δ in the swing equation represents the:





11. The critical clearing time in transient stability analysis refers to the time:





12. The term ‘voltage collapse’ in power systems refers to:





13. In a power system, FACTS devices are used primarily for:





14. The main function of an automatic voltage regulator (AVR) is to:





15. The primary purpose of load shedding in a power system is to:





16. In power system stability analysis, the swing curve represents the variation of:





17. The concept of ‘voltage stability’ in a power system is concerned with:





18. The steady-state stability limit of a power system is primarily determined by:





19. In a power system, the term ‘generator inertia’ refers to:





20. An ‘excitation system’ in a synchronous generator is responsible for:





21. A ‘reactive power loop’ in power systems involves:





22. The primary function of a ‘load frequency control’ system in a power network is to:





23. The term ‘damping ratio’ in power system stability analysis indicates:





24. A ‘static VAR compensator’ (SVC) is used in power systems to:





25. A ‘voltage regulator’ in a power system primarily controls:





26. The term ‘power angle’ in power system stability analysis refers to:





27. A ‘fault ride-through capability’ of a generator refers to its ability to:





28. The ‘steady-state stability limit’ of a power system is primarily determined by:





29. In a power system, the term ‘angle stability’ refers to the ability of:





30. A ‘dynamic braking resistor’ in a generator is used to:





31. The ‘critical fault clearing time’ in transient stability analysis is the time required to:





32. The ‘inertia constant’ of a synchronous generator represents its:





33. ‘Primary frequency control’ in power systems is typically achieved through:





34. The term ‘dynamic stability’ in a power system refers to the ability to:





35. A ‘pole slipping’ event in power systems can lead to:





36. The ‘reactive power demand’ in a power system is primarily influenced by:





37. The term ‘synchronizing power’ in power systems refers to:





38. The ‘voltage collapse’ phenomenon in power systems is often triggered by:





39. The ‘angle stability limit’ in power systems is primarily determined by:





40. A ‘transient voltage dip’ in a power system can result from:





41. The ‘swing equation’ in power system stability analysis describes the dynamics of:





42. A ‘load shedding’ scheme in a power system is activated to:





43. The ‘fault duration’ in transient stability analysis affects:





44. In power system stability analysis, ‘small signal stability’ refers to the stability of:





45. A ‘power system stabilizer’ (PSS) is primarily designed to improve:





46. The ‘critical clearing angle’ in transient stability analysis is defined as the angle between:





47. The ‘inrush current’ in transformers during energization can lead to:





48. The ‘steady-state stability’ of a power system is determined primarily by:





49. The ‘dynamic braking resistor’ in a generator helps in:





50. The ‘angular stability’ of a synchronous generator refers to its ability to:





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