POWER QUALITY (EEE 061) –
UPTU Sample Question Papers
– BY Mr. Abhishek (JSSATEN)
SECOND SESSIONAL
Section A
1.
What are the steps for estimating voltage sag
performance? Explain the concept of area of vulnerability.
2.
Explain the fundamental principle of protection
against voltage sag.
3.
What is UPS? Write down its classifications and
applications. Explain working of Hybrid UPS.
Section B
4.
What is transient over-voltage? What are
different sources of transient over-voltage? Explain magnification of
capacitance switching transients in power system.
5.
Explain the fundamental priciple of protection
against transient over-voltage.
6.
Explain the phenomena “Ferroresonance” with
clearly writing its comparison with series RLC resonance.
Section C
7.
Discuss the following as solution to end user
agains voltage sag”
i.
Ferroresonance transformers.
ii.
Superconducting magnetic energy storage (SMES)
devices.
8.
Discuss the following for transient over-voltage
protection:
a.
Low impedance power conditioners.
b.
Low pass filters.
FIRST SESSIONAL
A1. What is power quality? Explain in terms of voltage
quality. Why we are concerned
about it ?
A2. Define voltage fluctuations along with suitable
waveforms, what are the causes & effects of voltage fluctuations on utility
& users ?
A3. What are the causes & effects of voltage imbalance
& power frequency variations ?
B.1. What are transients? Differentiate between impulsive
& oscillatory trnasients with suitable waveforms.
B.2. What are short duration voltage transients? Explain
along with suitable waveforms, also explain its different types?
B.3. What are long duration voltage transients? Explain
along with suitable waveforms, also explain its different types.
C. 1 What is voltage sag? What are the different sources of
voltage sag? Explain.
C2. Define waveform distortion. Explain following types of
waveform distortions as per IEEE standards :
Harmonics, Inter-harmonics, DC offset, Notching, Noise
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