Advanced Power Electronics (Departmental Elective - II) — Summer 2021

What is the need of multi-level inverter? Give its classifications.

What do mean by switch mode power supply? How is it differs from linear regulated power supply?

Draw necessary waveforms and explain working of Boost converter in continuous and discontinuous conduction mode.

What do you mean by hard and soft switching? How does the ZCS and ZVS principle help to achieve soft switching?

Explain half bridge dc-dc converter with neat diagram and waveforms.

Explain three level diode clamped type multi-level inverter. What are demerits of this topology?

Discuss operation of a five level flying capacitor multilevel inverter with neat circuit diagram and waveforms.

List the possible combinations or configurations of the phase shifting transformers for the 18-pulse converter clearly indicating the phase shift from the respective windings/transformer.

Calculate the total no. of switches and power supply required in case of nine level cascade H-bridge inverter connected to a single phase load? Also calculate the minimum number of switches required in case of DC power supply with unequal magnitudes.

Which harmonics are dominant in line for a 12-pulse multi-pulse converter? Also, explain how harmonic cancellation occurs in multi- pulse converter.

Explain the role of transformer in isolated DC-DC converter.

Draw circuit diagram and waveforms of output voltage and input line current in case of six-pulse diode rectifier connected to resistive load.

Discuss operation of Cuk converter. Derive the relation between duty ratio and input voltage.

Explain the significance of third winding in case of forward converter.

Classify carrier-based PWM technique for multilevel inverter. Discuss any one in detail.

Discuss operation of parallel load resonant DC to DC converter.

Draw block diagram of HVDC transmission system. Mention equipment required for HVDC system.

Give comparison of SVC and STATCOM.1

With neat circuit diagram and waveform discuss class Eresonant inverter.

Define FACTS. Give classification of FACTS controllers.

Give comparison of HVAC and HVDC transmission.

Explain working of STATCOM with neat diagram.

Discuss importance of reactive power compensation.

Write the advantages and limitations of SSSC.

Explain working of FC-TCR with neat diagram and waveforms.