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Power Systems

Power Systems for GATE Electrical Engineering, one topic per lesson: the theory in plain words, the formulas, a solved example, and GATE-style questions (MCQ, MSQ and NAT) whose numerical answers are recomputed by a program when the site is built.

Start the first lesson

1Transmission

  1. Transmission Line ParametersResistance and skin effect, inductance and capacitance of single-phase and three-phase lines using GMD and GMR, transposition, bundled conductors, corona and sag of overhead lines.
  2. Performance of Transmission LinesShort, medium and long line models, ABCD constants, voltage regulation and efficiency, Ferranti effect, surge impedance loading, power transfer and reactive power compensation.

2Analysis

  1. Per-Unit System and Load FlowPer-unit quantities and change of base, single-line diagrams, bus admittance matrix formation, bus types, Gauss-Seidel and Newton-Raphson load flow, and voltage control.
  2. Faults and Symmetrical ComponentsSymmetrical three-phase faults and fault MVA, sub-transient and transient reactances, symmetrical components, sequence networks, and line-to-ground, line-to-line and double line-to-ground faults.

3Operation

  1. Protection, Stability and Economic DispatchOvercurrent, distance and differential relays, plug setting multiplier, circuit breakers, swing equation, equal area criterion, critical clearing angle, and economic load dispatch with equal incremental cost.