HVDC & FACTS (EX-702 (B)) - Important Questions

What are FACTS controllers? Discuss the different types/categories of FACTS controllers with examples.

Explain the flow of power in AC parallel paths and meshed systems with suitable diagrams.

What is a STATCOM? Explain its construction and working/operation for reactive power compensation.

What is SSSC? What are its uses? Explain its operation and basic operating control schemes with a suitable diagram.

Explain the objectives and methods of controllable VAR generation.

Explain the working principle and characteristics of the Interline Power Flow Controller (IPFC) with a suitable diagram.

Explain how active power filters provide harmonic current and reactive power compensation and discuss its significance.

With a neat diagram, explain the construction, operating principle and control structure of the Unified Power Flow Controller (UPFC).

Draw the layout/schematic diagram of an HVDC converter station and discuss the various equipments/apparatus and purpose of each.

Explain the equivalent circuit representation of rectifier and inverter configurations in HVDC systems.

Explain the analysis of HVDC bridge converters with and without overlap.

Explain the principles of control of HVDC system and the desired features of control.

Compare series and parallel MTDC systems in terms of operation, control and reliability.

Discuss and compare AC filters and DC filters in HVDC systems.

Write short notes on any two of the following: (i) Ignition angle control (ii) Current and extinction angle control (iii) Power reversal in HVDC systems (iv) VSC-based HVDC system.