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22-Elec-B7 Power Systems Engineering: May 2018

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Power Factor of System Equipment; Bundled-Conductor Line Parameters and the Long-Line Model
  2. Question 2 The Reactive Capability Curve and a Round-Rotor Operating Table
  3. Question 3 Transformer Behaviour on a Changed Supply Frequency; Performance from the Cantilever Equivalent Circuit
  4. Question 4 The Slack Bus, and a Three-Bus Power-Flow Solution
  5. Question 5 Transmission-Line Protection Schemes, and a Mid-Line Three-Phase Fault
  6. Question 6 Sequence Networks and a Line-to-Line Fault at the Mid-Point of a Line
  7. Question 7 Transient Stability under a Sustained Fault, by the Equal-Area Criterion

Start with Question 1 →

Paper format. National Exams May 2018, 16-Elec-B7 Power Systems Engineering — open book, 3 hours, non-communicating calculator permitted. Seven problems of equal value; a complete paper (100 per cent) corresponds to 100 points scored out of a total possible 140 points, so every problem carries 20 points. Candidates are told to attempt all parts of all questions and to state any interpretive assumptions with the answer script.

Reference texts. M. E. El-Hawary, Electrical Power Systems: Design and Analysis, revised printing, IEEE Press / Wiley — the text whose notation (the cantilever transformer model, the sequence-network reduction, the two-curve equal-area construction) this paper follows throughout. J. D. Glover, T. J. Overbye and M. S. Sarma, Power System Analysis and Design, 6th ed. — line parameters, bundling, power flow and symmetrical components. J. J. Grainger and W. D. Stevenson, Power System Analysis — fault analysis and network reduction. P. Kundur, Power System Stability and Control — the generator capability diagram and transient stability. S. J. Chapman, Electric Machinery Fundamentals, 5th ed. — transformer and synchronous-machine behaviour. For Canadian protection and insulation-coordination practice, the IEEE C37 relay standards and CSA C22.3 overhead-systems series apply.