5EE5 TRANSMISSION & DISTRIBUTION

  1. SUPPLY SYSTEMS: Basic network of power systems, Effect of system voltage on size of conductor and losses, comparison of de 2-wire, de-3 wire, 1-phase ac and 3-phase (3 wire and 4 wire) ac systems, transmission voltages.

  2. DISTRIBUTION AUTOMATION: Types of primary & secondary distribution system, voltage drop, Kelvin's law, Lamp flicker, Distribution automation, project planning, communication, sensors, supervisory control and data acquisition consumer information service, introduction to automation systems.

  3. INSULATORS: Pin shackle, suspension, post and strain insulators, bushing, voltage distribution over an insulator string, grading and methods of improving string efficiency, pollution flashower.

  4. MECHANICAL FEATURES OF OVERHEAD LINES: Different types of conductor materials with special reference to their mechanical properties. Line support, cross-arms and stays,spacing and arrangement of conductors. Conductors' vibration and its prevention sag tension calculation for various conditions. Sag templates. conductor erection and stringing.

  5. PARAMETERS OF TRANSMISSION LINES: Resistance inductance and capacitance of overhead lines. Effect of earth. Line transposition. geometric mean radius and distance. Inductance and capacitance of line with symmetrical an unsymmetrical spacing. Inductance and capacitance of double circuit lines. Skin and proximity effects.

  6. PERFORMANCE OF TRANSMISSION LINES: Steady state analysis short, medium and long lines. Generalized ABCD line constant. Receiving end & sending end power circle diagrams. Ferranti effect. Interference with communication circuits.

  7. CORONA: Electric stress between parallel conductors. Disruptive critical voltage and visul critical voltage. Calculation for 3-phase overhead line corona power loss. Factors affecting corona. Effect of corona.

  8. UNDERGROUND CABLES: Conductor, insulating, sheathing and armouring maaterials. Types of cables. Insulation resistance and capacitance calculation. Reduction of maximum stresses. Causes of break down, idea about oil filled and gas filled cables,Thermal rating of cable.

  9. TRAVELLING WAVES: Travelling waves on transmission lines. Wave equation, specification of travelling waves. Reflection and refraction of travelling waves. Typical cases of line terminations.


RECOMMENDED BOOKS.

  1. A.S. Pabla:Electric power distribution.

  2. B.R. gupta:Power system analysis and design

  3. Soni, Gupta and Bhatnagar:A course in electrical power.

  4. C.L. Wadhwa:Electrical power systems

  5. Nagrath kothan:Modern power system analysis

  6. J.J. Grainger & W.D. Stevenson:Power system analysis