MCQs on FACTS Page 1

1. FACTS devices used in

a) Generation             

b) AC transmission

c) DC transmission   

 d) None


2. Voltage control means

a) Boosting the feeder voltage

b) Reducing the line voltage under over voltage conditions

c) Keeping the voltage level within the allowable limits.

d) None 


3. Line drop compensation corrects for

a) Line drop lagging P.F                

b) voltage at leading P.F

c) Transformer voltage drop     

d) voltage drop in feeder lines


4. Which are the shunt compensation devices

a) TCSC                                              

b) SSSC

c) UPFC                                                

d) SVC


5. FACTS devices are generally used for to compensate__________of the transmission line

a) reactive power

b) active power

c) apparent power


6. Transmission efficiency increases as

a) voltage and power factor both increase

b) voltage and power factor both decrease

c) voltage increases but power factor decreases

d) voltage decreases but power factor increases.


7. SVC and STATCOM are______________ devices.

a. series

b. series and shunt 

c. shunt and series 

d. shunt


8. SVC stands for________________.

a.Static Var Compensator

b. Static voltage controller

c. Static var converter

d. Static voltage converter


9. STATCOM stands for_________________.

ANS: Static Synchronous Compensator


10. STATCOM is______________ regulating device.

a. Current 

b. Voltage

c. Current and Voltage

d. Power factor


11. The main Objective of series compensation

a) It improve the power factor                                   

b) It reduces the fault currents

c) Reduce the voltage drop over long distance          

d) None


12. TCSC is a

a) Shunt compensation device         

b) Series compensation device

c) Both a & b                                   

d) None of the above


13. SSSC is a

a) Series compensation device        

b) shunt compensation device

c) combined compensator               

d) loss reduction device


14. Disadvantage with series compensation

a) Reduce the stability

b) increase the voltage drop

c) Reduce the power factor 

d) Increase in fault current


15. SSSC stands _________________.

ANS: Static Synchronous Series Compensator 


16. UPFC stands _________________.

ANS: Unified power flow controller


17. The purpose of the transmission network is to ___________

ANS: pool power plants and load centres


18. Transmission Interconnection is done for________

a. economic reasons

b. to reduce the cost of electricity and

c. to improve reliability of power supply.

d. All of these


19. FACTS controllers can enable a line to carry power closer to its_______

a. Full efficiency

b. Dielectric rating

c. Thermal rating


20. What limits the loading capability__________

a. Thermal

b. Dielectric

c. Stability

d. All of these


21.Basic types of FACTS controller___________

a. Series Controllers and Shunt Controllers

b.Combined series-series Controllers

c.Combined series-shunt Controllers

d. All of these


22.The voltage fluctuations are largely a consequence of the ______ in series impedances of lines, transformers, and generators.

a. Current

b. Power

c. Voltage drop

d. None of these


23. Unified Power Flow Controller (UPFC) is combination of _________

a. STATCOM and TCSC

b. SSSC and TSC

c. STATCOM and SSSC

d. TSSC and TCR


24. Load compensation is the management of _______ to improve the quality of supply in ac power systems.

a. Active power 

b. Reactive power

c. Apparent power

d. Both a & b


25. Objectives of Load compensation________

a. Power-factor correction.

b. Improvement of voltage regulation.

c. Load balancing

d. All of these



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