Sensitivity and performance analysis – MCQs – EE

1. Sensitivity analysis in power systems is used to:
(A) Determine how small changes in system parameters affect outputs
(B) Step response only
(C) Measure line impedance
(D) Reduce system stability

2. Performance indices in power systems evaluate:
(A) System efficiency, reliability, and stability
(B) Step response only
(C) Only line current
(D) Reactive power

3. Participation factors help to:
(A) Identify contribution of each generator to system modes
(B) Step response only
(C) Only load flow
(D) Voltage measurement

4. Eigenvalue analysis is used for:
(A) Small-signal stability assessment
(B) Step response only
(C) Only reactive power control
(D) Load shedding

5. Voltage sensitivity shows:
(A) How bus voltage changes with load or reactive power variations
(B) Step response only
(C) Only frequency change
(D) Line current only

6. Frequency sensitivity helps to:
(A) Evaluate the effect of load changes on system frequency
(B) Step response only
(C) Only voltage measurement
(D) Load shedding

7. Performance analysis of power systems includes:
(A) Transient, small-signal, and voltage stability studies
(B) Step response only
(C) Only load flow
(D) Line impedance measurement

8. Sensitivity factors are used to:
(A) Assess the effect of parameter variations on system performance
(B) Step response only
(C) Only reactive power
(D) Transformer ratings

9. Modal analysis identifies:
(A) Dominant oscillation modes and their damping
(B) Step response only
(C) Only load flow
(D) Voltage magnitudes

10. System damping ratio is important for:
(A) Assessing oscillation decay rate
(B) Step response only
(C) Only voltage control
(D) Load shedding

11. Voltage stability can be analyzed using:
(A) Sensitivity of voltage to reactive power changes
(B) Step response only
(C) Only frequency analysis
(D) Load flow only

12. Participation factors are computed from:
(A) Eigenvectors of system matrix
(B) Step response only
(C) Only load flow
(D) Voltage measurements

13. Line outage sensitivity evaluates:
(A) How system parameters change when a line is removed
(B) Step response only
(C) Only generator voltage
(D) Reactive power injection

14. Generator sensitivity helps to:
(A) Assess influence of generator output changes on system states
(B) Step response only
(C) Only line voltage
(D) Load shedding

15. Performance indices can be:
(A) Quantitative measures of system stability or security
(B) Step response only
(C) Only current measurement
(D) Load flow only

16. Contingency analysis sensitivity studies:
(A) Identify weak points under faults or disturbances
(B) Step response only
(C) Only reactive power
(D) Load shedding only

17. Participation factors indicate:
(A) Contribution of each state variable to oscillatory modes
(B) Step response only
(C) Only load flow
(D) Voltage profile

18. Sensitivity matrix shows:
(A) Relation between parameter changes and system responses
(B) Step response only
(C) Only line current
(D) Voltage magnitudes

19. Small-signal stability performance is evaluated using:
(A) Eigenvalue and eigenvector analysis
(B) Step response only
(C) Only load flow
(D) Reactive power only

20. Voltage performance indices are used to:
(A) Quantify voltage deviation or instability risk
(B) Step response only
(C) Only frequency deviation
(D) Line current measurement

21. Sensitivity of power flow to parameter changes helps to:
(A) Identify critical lines and generators
(B) Step response only
(C) Only voltage magnitude
(D) Load shedding

22. System performance can be affected by:
(A) Load variations, generation changes, and line outages
(B) Step response only
(C) Only reactive power
(D) Step voltage only

23. Modal participation can help to design:
(A) Power system stabilizers
(B) Step response only
(C) Only load flow
(D) Voltage control devices

24. Sensitivity factors are used in:
(A) Security assessment, contingency ranking, and voltage control
(B) Step response only
(C) Only frequency control
(D) Load shedding

25. Performance metrics may include:
(A) Damping ratio, overshoot, settling time, and voltage deviation
(B) Step response only
(C) Only load flow
(D) Line impedance

26. Participation analysis identifies:
(A) Critical generators or buses contributing to modes
(B) Step response only
(C) Only line currents
(D) Voltage measurement only

27. Sensitivity analysis helps in:
(A) Prioritizing control actions and system improvements
(B) Step response only
(C) Only load flow
(D) Reactive power measurement

28. Eigenvalue location determines:
(A) System mode frequency and damping
(B) Step response only
(C) Only reactive power
(D) Load shedding

29. Voltage and frequency performance indices guide:
(A) Operation and control decisions in power systems
(B) Step response only
(C) Only load flow
(D) Line impedance

30. Sensitivity and performance analysis improves:
(A) System reliability, stability, and operational planning
(B) Step response only
(C) Only reactive power
(D) Load shedding only