MCQs on FACTS Page 6

1. Shunt connected, fixed or switched reactors are applied to___________.

a. minimize line overvoltage under light load conditions

b. minimize line overvoltage under heavy load conditions

c. maximize voltage levels under light load conditions

d. maximize voltage levels under heavy load conditions

2. Shunt connected, fixed or switched capacitors are applied to________.

a. maintain line voltage levels under light load conditions

b. maintain line voltage levels under any load conditions

c. maintain line voltage levels under heavy load conditions

d. maintain line voltage levels under no load conditions

3. The objectives of applying reactive shunt compensation in a transmission system is to_______.

a. increase the transmittable power.

b. improve the steady-state transmission characteristics

c. the stability of the system

d. all the above

4. The midpoint shunt compensation can increase the transmittable power doubling its maximum value at the expense_________.

a. doubling reactive power demand on the midpoint compensator and end generator

b. 4 times the reactive power demand on the midpoint compensator and end generator

c. 6 times reactive power demand on the midpoint compensator and end generator

d. without any change of reactive power demand

5. For the single-line system the midpoint of the transmission line is the best location for the compensator. This is because_____.

a. the voltage sag along the uncompensated transmission line is the weakest at the midpoint

b. the voltage sag along the uncompensated transmission line is not largest at the midpoint

c. the voltage sag along the uncompensated transmission line is the largest at the endpoints

d. the voltage sag along the uncompensated transmission line is the largest at the midpoint

6. With the increase of the number of segment shunt compensators, the voltage variation along the line would______.

a. rapidly decrease

b. rapidly increase

c. not change

d. slightly increase

7. The shunt compensation does________.

a. not provide end of line voltage support to prevent voltage instability

b. provide only mid of line voltage support to prevent voltage instability

c. provide end of line voltage support to prevent voltage instability

d. may or may not provide end of line voltage support to prevent voltage instability

8. Without compensation the voltage at the receiving end would________.

a. not vary with the load and load power factor

b. vary with only the load

c. vary with the load and load power factor

d. vary with only the load power factor

9. The voltage stability limit______________.

a. increases with inductive loads and decreases with capacitive loads_________.

b. decreases with inductive loads and increases with capacitive loads

c. decreases with inductive loads and capacitive loads

d. increases with inductive loads and capacitive loads

10. Appropriately controlled shunt compensation can enhance transient stability by_______.

a. providing effective voltage support, it can increase the transmission capability of the post-fault system

b. increasing the transmission capability of the post-fault system only

c. providing effective voltage support only

d. none of the above

11. If the uncompensated system has a sufficient transient stability margin, shunt compensation can_________.

a. considerably increase the transmittable power without decreasing transient stability margin

b. considerably increase the transmittable power with decreasing transient stability margin

c. considerably decrease the transmittable power without decreasing transient stability margin

d. considerably increase the transmittable power by increasing transient stability margin

12. A phase shifting of the transformer is adjusted by_________.

a. SCR

b. Chopper

c. Cycloconverter

d. Phase advancer

13. Power systems are normally designed to be transiently stable, when subjected to a major disturbance_________.

a. with defined pre-fault contingency scenarios

b. with defined pre-fault contingency scenarios and post-fault system degradation

c. with post-fault system degradation

d. with required enhancement in power transmission capability

14. It is economically savvy to employ fast acting compensation techniques, instead of overall network compensation, _________.

a. dynamic events and increase the transmission capability of the degraded system

b. dynamic events of the degraded system

c. transmission capability of the degraded system

d. voltage of the system

15. In power oscillation damping with shunt compensator, when the rotationally oscillating generator accelerates and__________.

a. the electric power transmitted must be decreased

b. the electric power transmitted must be constant

c. the electric power transmitted must be increased

d. mechanical input power must be decreased

16. In power oscillation damping with shunt compensator, when the generator decelerates and angle delta decreases, _________.

a. the electric power must be increased

b. the electric power must be constant

c. the mechanical input power must be increased

d. the electric power must be decreased

17. In power oscillation damping with shunt compensator, when the rotationally oscillating generator accelerates and___________.

a. compensator shall introduce capacitive reactive power

b. compensator introduce inductive reactive power

c. no changes in reactive power shall be made

d. mechanical input power must be decreased

18. In power oscillation damping with shunt compensator, when the rotationally oscillating generator decelerates and___________.

a. compensator shall introduce capacitive reactive power

b. compensator introduce inductive reactive power

c. no changes in reactive power shall be made

d. mechanical input power must be increased

19. The compensator must stay in_______with the ac system at the compensated bus under all operating condition______.

a. asynchronous operation

b. disconnected mode

c. synchronous operation

d. none of the above

20. What are the sources of Real Power?

a. AC Generators

b. DC Generators

c. All AC & DC Generators

d. None

21. FACTS technology essential can overcome every type of hurdle in the transmission system_____.

a. True

b. False

c. Can not be determined

d. None of these

22. A Device whose output current which is either inductive or capacitive can be controlled effectively the system potential difference is known as________.

a. SSG

b. BESS

c. SMES

d. STATCOM

 

23. TCBR involves cycle by cycle switching of a resistor, the resistor is basically a_______.

a. Non-Inductive

b. Linear

c. Nonlinear

d. None of The Above

24. The device which based on thyristor but having no gate turn off capability_________.

a. TCSC

b. TCR

c. TSSR

d. TSSC

25. Which of the following is the alternative for STATCOM at lower cost_______.

a. TCR

b. SMES

c. SSSC

d. SVC

26. STATCOM was first implemented in the year_________.

a. January 1980

b. January 1981

c. January 1983

d. January 1985

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