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Design of a Modern Compact Transmission Line for Electrical Energy Transmission in Long Distances at 400 kV

Karami, Marzie | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43877 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Vakilian, Mehdi
  7. Abstract:
  8. With new progresses in technology, a growing need to power energy has emerged. In Iran most of power plants are far from cities and therefore expansion of power network will cause long transmission lines with high capacities which connect power plants to cities. There are three solutions for these kinds of lines: 1) two-circuit transmission lines 2) higher voltages 3) new forms of transmission lines (HVDC and compact). In this thesis some of these suggestions have been analyzed to find the best solution for a 560 Km transmission line in Iran.
    Designing transmission lines has a lot of steps which all are related to each other. In this project a comprehensive algorithm has been utilized to find the line with minimum cost and all other satisfactory constraints. This algorithm determines voltage level, optimal configuration, normal sag, maximum tensile of conductors, tower model and its dimension and etc. also costs of new lines have been divided into 3 major groups: 1) Price of towers and cost of their installation 2) Cost of power loss in the operation period 3) Price of conductors. A typical conventional transmission line has been designed to evaluate the differences between compact and modern transmission lines and substitutable type of conventional ones. Though there are lots of hypotheses of prices and costs related to all manufacturing and installation fields of transmission lines, but the manipulated method can be utilized for all other transmission line projects. Also a comparison between asymmetrical and symmetrical configuration of subconductors of transmission line bundles has been done which comprise of natural power of line, audible noise, electric field and power loss. Finally simulation in EMTP software is done to assue all aspect of insulation design in terms of phase-phase spacing and insulator’s selection. Results of EMTP simulations are compared with results of FLASH software of IEEE
  9. Keywords:
  10. Power Transmission Line ; EMTP Software ; Electrical Field ; Compact Line ; Symmetrical Bundle ; Subconductor ; Unsymmetrical Bundle

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