Compare buck, boost and buck-boost converter with reference to technical parameters.
[3 marks]Write the advantages of resonance converter as compared to PWM converter.
[4 marks]Illustrate the push pull converter with neat circuit diagram & waveform and derive the equation of output voltage in terms of input voltage & duty cycle.
[7 marks]Define duty cycle and write its importance.
[3 marks]Differentiate between continuous mode of conduction and discontinuous mode of conduction.
[4 marks]Justify the name of converter as zero voltage switching converter with necessary diagram and waveform.
[7 marks]Illustrate how the harmonic current are canceled by phase shifting transformer in 12 pulse rectifier.
[7 marks]Compare the three topologies of multilevel inverter.
[3 marks]Compare HVAC and HVDC transmission line.
[4 marks]The buck-boost regulator has an input voltage = 12 V, duty cycle = 0.25, switching frequency = 25 kHz, inductor = 150 μH, filter capacitor = 220 μF and average load current = 1.25 A. Determine (a) Average output voltage (b) Peak to peak output voltage ripple (c) Peak to peak ripple current (d) Peak current of switch (e) Critical value of Land C.
[7 marks]Introduce the multi pulse converter.
[3 marks]Draw circuit diagram of 9 level asymmetric cascaded Hbridge multilevel inverter and mention the switching states to generate 0 level.
[4 marks]The class Eresonance inverter operates at resonance and has Vs = 12 V, R= 10 Ω, fs = 25 kHz and Q = 7. Determine optimum value of L, C, Ce and Le.
[7 marks]Draw block diagram of HVDC transmission system. Mention equipment required for HVDC system.
[3 marks]Justify: ZVS is better than ZCS.
[4 marks]Explain in detail about rectifier and inverter control characteristic of HVDC converter.
[7 marks]State the need of reactive power compensation.
[3 marks]Draw and explain bipolar HVDC power transmission system based on pulse converters for each pole.
[4 marks]Discuss the operation of thyristor switched capacitor.
[7 marks]Compare SVC and STATCOM.
[3 marks]Classify carrier based PWM technique for multilevel inverter. Discuss any one in detail.
[4 marks]Explain in brief about FACTS.
[7 marks]Explain star/delta phase shifting transformer with phasor diagram.
[3 marks]Write the advantages and limitations of SSSC.
[4 marks]Explain how multilevel inverter is used as reactive power compensator with necessary vector diagram.
[7 marks]