Power System‑II (EX-601) - Important Questions

What do you understand by restructuring process? Describe various entities involved in restructuring process.

Compare various load flow / power flow solution methods used in power system analysis.

Explain the Gauss-Seidel method for load flow analysis, including algorithm/flow chart for PQ buses and modification for PV buses.

Formulate the static power flow equations for a power system and explain classification of buses for load flow studies.

Determine the Ybus for the 4-bus system from given line series impedances neglecting shunt capacitance of the lines.

Explain generation/production and absorption of reactive power in power system components and methods used for it.

Discuss the various voltage control methods used in modern power systems.

Derive the swing equation and explain its physical significance in the context of rotor angle stability.

A generator is delivering power to an infinite bus. Given pre-fault, during-fault and post-fault maximum power transfer capabilities, determine the critical clearing angle by equal-area criterion.

Explain why it is necessary to keep strict limits on power system frequency variations.

A 100 MVA 50 Hz turbo alternator operates at no load. A load is suddenly applied and governor action starts after a time lag due to inertia. Calculate the frequency drop before governor action, given H, power imbalance and time lag.

Differentiate between steady-state and transient stability of a power system connected to infinite bus and discuss the factors affecting steady-state and transient stability.

Write a short note on economic dispatch of power system.

Explain the working of an automatic voltage regulator for turbo generators with the help of a block diagram.