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EX-601 RGPV B.Tech

Power System‑II (PS)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

4 papers, latest Jun 2025

Free
See all 4 papers

Syllabus, notes and important questions for EX-601

Syllabus units

Topics as the official RGPV syllabus lists them.

Unit 1 General Problems in Modern Power Systems 5 topics
  • Problems associated with modern interconnected power systems
  • Deregulation and power‑systems restructuring
  • Distributed generation and congestion issues
  • Available transfer capacities
  • Pricing of energy and transmission services
Unit 1 notes
Unit 2 DC Machine‑II and Power‑Flow Studies 10 topics
  • DC machine – II
  • $\text{Static power‑flow equations}$ and solution methods
  • Gauss–Seidel method for load flow
  • Newton‑Raphson method for load flow
  • Fast Decoupled Load‑Flow (FDLF) method
  • Comparison of Gauss–Seidel, Newton‑Raphson and FDLF methods
  • Economic operation of power systems – economic dispatch
  • Emission dispatch and line loss minimisation
  • Incremental transmission loss (ITL) calculation
  • Economic dispatch using Lagrangian multiplier method
Unit 2 notes
Unit 3 MW Frequency Control and AGC 11 topics
  • Fundamentals of speed governing for MW frequency control
  • Modelling of speed‑control mechanisms
  • Primary Automatic Load‑Frequency Control (ALFC)
  • Closing of ALFC
  • Static and dynamic response to primary ALFC
  • Speed‑control characteristics
  • Fundamentals of Automatic Generation Control (AGC)
  • AGC in isolated and interconnected power systems
  • Modelling of the tie‑line
  • Static and dynamic response of a two‑area system
  • Economic dispatch control related to frequency regulation
Unit 3 notes
Unit 4 Reactive Power & Voltage Control 7 topics
  • Reactive power and voltage control fundamentals
  • Protection and absorption of reactive power
  • Methods of voltage control – static VAR systems
  • Types and applications of static VAR devices
  • Characteristics of excitation systems
  • DC, AC and static excitation systems
  • General block‑diagram representation of voltage regulators
Unit 4 notes
Unit 5 Power System Stability 4 topics
  • Power‑system stability – steady‑state, dynamic and transient stability
  • Swing equation and equal‑area criterion
  • Solution of swing equation using step‑by‑step method, modified Euler’s method and Runge‑Kutta method
  • Methods of improving transient stability
Unit 5 notes
Read the full syllabus

Exam insights

Counted from 4 past EX-601 papers.

Marks asked per paper, by unit

  • Unit 1 General 10 marks
  • Unit 2 Power flow studies - Economic operation of power system 35 marks
  • Unit 3 MW Frequency control 18 marks
  • Unit 4 Reactive Power & Voltage control 24 marks
  • Unit 5 Power System Stability 24 marks

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

Asked again and again

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

    Asked 4 times: 2025, 2024, 2020

  2. Calculate the frequency drop/change due to sudden load addition or rejection before governor action, given MVA rating, inertia constant H, power imbalance and governor time lag.

    Asked 4 times: 2025, 2024, 2020

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

    Asked 3 times: 2025, 2024, 2020

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