Course Details

Subject {L-T-P / C} : EE3112 : Power Systems {3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Ananyo Sengupta


Power System Network: Basic structure of power system, Introduction to power generation, transmission and distribution system, Power network in India.
Line Parameters: Transmission line resistance, Inductance, Flux Linkage of an isolated current-carrying conductor, Inductance of a single-phase two-wire line, Flux linkage of one conductor in a group, Inductance of composite conductor lines, Inductance of three phase lines, Bundled conductors Capacitance of a two-wire line, capacitance of a three-phase line with equilateral spacing, Capacitance of a three-phase line with unsymmetrical spacing, Effect of earth on transmission line capacitance.
Representation of Power system Components: Single-phase solution of balanced three-phase network, Single line diagram of power system, Per-Unit system, classical model of synchronous machine.
Performance of Transmission Line: Evaluation of ABCD parameters for short transmission line, medium transmission line and long transmission line, Nominal T and p representation, Ferranti effect, Line voltage regulation and voltage control.
Load Flow Analysis: Network equation, Power Flow problem, Gauss-Seidel method, Newton-Raphson method, Decoupled method, Fast Decoupled method.
Power System Fault Analysis: Balanced Fault, Fault analysis using Z-bus matrix, Z-bus matrix building algorithm Symmetrical Component and Unbalanced fault, Sequence impedances of load, transmission lines, transformer and generator, Unbalanced Fault analysis using sequence impedance matrices, Single-line-to-ground fault, Line-to-line fault, Double-line-to-ground fault analysis.
Power System Protection: General architecture of protection system, Evolution of relays, Attributes of a protection system, Current and potential transformer for relays, Zones of protections, Concept of primary and back-up protection, Introduction to overcurrent protection, distance protection, differential protection Circuit Breaker operation and types.

Course Objectives

  1. 1. To develop basic idea and mathematical models of several power system components.
    2. To perform steady state analysis of a power system.
    3. To perform short circuit analysis of a power system
    4. To understand the basic protection philosophy for power systems

Course Outcomes

At the end of the course, students will be able to
1. Understand the performance of transmission lines
2. Conduct steady state analysis of a power system
3. Perform short circuit analysis (for both balanced and unbalanced fault) of a power system
4. Understand the constructions and operating principles of overcurrent, distance and differential relays for transmission line, transformers and busbars.
5. Understand circuit breakers’ operation.

Essential Reading

  1. Hadi Sadat, Power system Analysis, PSA Publishing
  2. I.J. Nagrath and D. P. Kothari, Modern Power System Operation and Control, Tata McGraw-Hill Education

Supplementary Reading

  1. W. D. Stevenson, Elements of Power System Analysis, McGraw Hill
  2. Olle I. Elgerd, Electric Energy Systems Theory: An Introduction, McGraw Hill Education