IPQ & Facts Question Bank of Unit 3rd,4th & 5th - Vision Institute of Technology

Electrical transients

Important Questions

Explain power factor improvement using capacitor switching transient.
What are the devices for over voltage protection? Explain at least two giving suitablediagram.
What are the sources of transient over voltage? Explain some with suitable example.
Explain the sources of transient overvoltage also the devices used for overvoltage protection.
Write short note on – a) Capacitor switching transient , b) ups switching transients.
State and explain different mitigation methods and operational measures to minimize the voltage disturbances of customer site
What are different types of electrical transients that occur in power system.
Define crowbar devices.
Explain clamping devices.

(Fact System)

Important Questions-

Explain the working principle of Unified power quality conditioner (UPQC).
Discuss load compensation and voltage regulation using DSTATCOM.
Explain the operation of Distribution STATic COMpensator (DSTATCOM) used for sag mitigation.
Explain Unified Power Quality Conditioner (UPQC)
Explain in detail about Flicker Meter with suitable diagram.

(Harmonics)

Important Questions-

Explain complication introduced by power electronic switches.
What do you mean by harmonics?
What is power factor?
Define best possible method of harmonic elimination.
Explain harmonic analyzers.
Define Disturbance analyzers.
What are the effect of harmonics on Transformers and AC Motors?
Write a short notes on: (1) Harmonic Indices (2) Inter Harmonics.
What kinds of harmonics are generated due to switching operation of devices like IGBT, MOSFET and BJT Explain the problems associated with kind of harmonics.
What are the causes of voltage and current harmonics? Discuss the harmonic measurement technique.
Explain the impact of harmonic distortion on: (i) capacitors (ii) transformers (iii) motors.
What are the causes of voltage and Current harmonic? Determine RMS and THD of the following waveform.