B.TECH - Semester 8 power electronics applications in power systems Question Paper 2019 (nov)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What is meant by Selective Harmonic Elimination?
- Draw the phase to neutral voltage of a star connected load in a 3phase voltage source inverter working in $180^{\circ}$ conduction mode.
- What is meant by hysteresis control?
- Draw the circuit of a self commutated inverter.
- Explain how we can control the inverter in a PV system to change the active power delivered to the grid?
- Explain how the reactive power requirements of an induction machine are met in a wind generating system?
- Draw the block diagram of a static Kramer system.
- What is meant by an Active Filter?
- What is meant by series compensation?
- How is a static compensator different from active filters?
- (a) Obtain the Fourier analysis of phase to neutral voltage of a 3 ph VSI operating in $180^{\circ}$ conduction mode.
- (b) Formulate the equations for finding the switching angles for elimination the $3^{\text {rd }}$ and $5^{\text {th }}$ and $7^{\text {th }}$ harmonics from a single phase selected harmonic elimination inverter.
- (a) Draw the diagram of a Flying Capacitor type 3 level inverter and explain its functioning.
- (b) Show that the switching frequency of a hysteresis controlled inverter varies continuously for a sinusoidal reference signal.
- Explain the working of a solar PV Grid connected system with self commutated inverter with the help of block diagrams.
- Explain the working principle of a PV inverter with high frequency transformer, along with typical waveforms.
- Explain the working principle of a static Scherbius system based wind energy generation system with necessary diagrams.
- With block diagrams, describe the operating principle of a synchronous generator based wind energy generator with power electronic interface.
- Explain the principle of separating the harmonics and reactive power from the fundamental waveform in a static synchronous compensator. Give schematic diagrams and waveforms.
- Describe any one Shunt Active filter topology along with its control scheme. Draw block schematic diagram.