This set of FACTS Multiple Choice Questions & Answers (MCQs) focuses on “Power Semiconductor Devices – Thyristor Based Converter – Set 3”.
1. Inverters are ________
a) AC – DC converters
b) DC – DC converters
c) DC – AC converters
d) AC – AC converters
View Answer
Explanation: Inverters are dc-ac converters. It converts fixed dc into a variable ac voltage. The output voltage can be single phase or three phase.
2. Power Converters cannot introduce current harmonics into the supply system.
a) True
b) False
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Explanation: Power Converters can introduce current harmonics into the supply system. They also cause in injection of voltage harmonics into the supply system. This happens mainly due to their switching actions.
3. The output voltage of Power Converters is distorted.
a) True
b) False
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Explanation: The output voltage of Power Converters is distorted. This is because the converters output contain harmonics which may be fed into the supply system connected. Thus it results in distortion of the system voltage also.
4. Filters are required to be introduced in the input of a power converter fed system.
a) True
b) False
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Explanation: Filters are required to be introduced in the input of a power converter fed system. Filters are also required to be introduced in the output of a power converter fed system. This helps to minimize the harmonic level to an acceptable magnitude.
5. THD is an acronym for ________
a) Total harmonic distortion
b) Total hyperbolic distortion
c) Thyristor harmonic distortion
d) Transistor harmonic distortion
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Explanation: THD is an acronym for Total harmonic distortion. It determines the quality of a waveform of any power electronic device. Harmonic content of the waveform is required to determine THD.
6. DF is an acronym for ________
a) Distortion Factor
b) Displacement Factor
c) Dependence Factor
d) Disassociation Factor
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Explanation: DF is an acronym for Displacement Factor. It determines the quality of a waveform of any power electronic device. Harmonic content of the waveform is required to determine DF.
7. IPF is an acronym for ________
a) Input Power Factor
b) Inverter Power Factor
c) Inductive Positive Factor
d) Industrial Position Factor
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Explanation: IPF is an acronym for Input Power Factor. It determines the quality of a waveform of any power electronic device. Harmonic content of the waveform is required to determine IPF.
8. Buck converter is ________ converter.
a) step up voltage
b) step down voltage
c) step down or step up voltage
d) neither step down nor step up voltage
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Explanation: Buck converter is a step down voltage converter. The converter functions such that its output voltage is lower than its input voltage. Also it steps up its output current than its input current.
9. Fourier series is very helpful to evaluate the performance of a power converter.
a) True
b) False
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Explanation: Fourier series is very helpful to evaluate the performance of a power converter. Fourier series is used to assess the input and output voltages of a power converter. Fourier series is used to express the input and output currents of a power converter.
10. Boost converter is ________ converter.
a) step up voltage
b) step down voltage
c) step down or step up voltage
d) neither step down nor step up voltage
View Answer
Explanation: Buck converter is a step up voltage converter. The converter functions such that its output voltage is higher than its input voltage. Also it steps down its output current than its input current.
Sanfoundry Global Education & Learning Series – Flexible AC Transmission System (FACTS).
To practice all areas of Flexible AC Transmission System (FACTS), here is complete set of 1000+ Multiple Choice Questions and Answers.
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