This set of FACTS Multiple Choice Questions & Answers (MCQs) focuses on “Shunt Compensation – STATCOM”.
1. STATCOM is an acronym for ________
a) Static Synchronous Compensator
b) Static Energy Compensator
c) Static Synchronous Compartment
d) Static Asynchronous Compensator
View Answer
Explanation: STATCOM is an acronym for static synchronous compensator. It injects current almost in quadrature to the line voltage. Thereby it matches the capacitive or inductive reactance at the point of its connection to the system.
2. STATCOM can be a controller exhibiting the property of ________
a) only voltage source
b) only current source
c) voltage source or current source
d) inductive source
View Answer
Explanation: STATCOM can be employed as a voltage source based FACT controller. It can also be used as a current source based FACT controller. But the preference of its use as a voltage source prevails. It matches the capacitive or inductive reactance at the point of its connection to the system.
3. STATCOM is constructed based on gate turnoff (GTO) thyristors.
a) True
b) False
View Answer
Explanation: The Static Compensator (STATCOM) is constructed based on gate turnoff (GTO) thyristors. It injects current almost in quadrature to the line voltage to match the capacitive or inductive reactance at the point of its connection to the system. On the other hand the Static VAR Compensator (SVC) is assembled based on conventional thyristors.
4. STATCOM is basically a _______ compensator.
a) series
b) parallel
c) non-parallel
d) series-parallel combination
View Answer
Explanation: STATCOM is basically a parallel compensator. It can also be called a shunt controller. It can be used to absorb system harmonics.
5. STATCOM is an example of VIT FACTS controller.
a) True
b) False
View Answer
Explanation: Static synchronous compensator is an example of voltage source FACTS controller. It is not a variable impedance type FACTS controller. STATCOM is basically a shunt controller.
6. STATCOM is designed to act as ________ to absorb system harmonics.
a) an active filter
b) a passive filter
c) either an active or a passive filter
d) neither an active nor a passive filter
View Answer
Explanation: STATCOM is designed to act as an active filter to absorb system harmonics. It thus helps to damp the undesired oscillations due to those harmonics. It, therefore, helps to improve the power quality of a transmission system.
7. SSG is STATCOM.
a) True
b) False
View Answer
Explanation: Basically SSG is a combination of STATCOM and any energy source. This can either supply or absorb power as required in the system. STATCOM is one of the key FACTS controllers.
8. The operation of the STATCOM is analogous to those compensation characterizing ideal synchronous machines.
a) True
b) False
View Answer
Explanation: The operation of the STATCOM is analogous to those compensation characterizing ideal synchronous machines. It also performs analogous to compensating ideal synchronous machines. Both of them provide approximately instantaneous speed of response and control features independent of system voltage during shunt operation and current during series operation.
9. STATCOM employs ________ switching converters.
a) self-commutated, voltage-sourced
b) self-commutated, current-sourced
c) forced-commutated, voltage-sourced
d) voltage-commutated, current-sourced
View Answer
Explanation: STATCOM employs self-commutated, voltage-sourced switching converters. In doing so, it realizes rapidly controllable, static synchronous voltage sources. Thus it becomes an important FACTS Controller.
10. The STATCOM provides reactive compensation without ac capacitors or reactors.
a) True
b) False
View Answer
Explanation: The STATCOM provides reactive compensation without ac capacitors or reactors. It automatically produces or takes in the reactive power exchanged with the system because of its intrinsic capability to exchange both real and reactive power with the ac system, just like a synchronous machine does. However, the real power exchanged must be supplied to it, or absorbed from it, by the ac system.
Sanfoundry Global Education & Learning Series – Flexible AC Transmission System (FACTS).
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