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TRANSMISSION SYSTEM REQUIREMENTS

Transmission System Requirements
Listed below are the typical points to be considered before starting or even operating an Electrical Power System. These factors can be best categorized into three main points; Electrical Design, Mechanical Design & Structural Design.



Electrical Design of AC system involves; 

  • power flow requirements 
  • system stability and dynamic performance 
  • selection of voltage level 
  • voltage and reactive power flow control 
  • conductor selection 
  • losses 
  • corona-related performance(radio, audible, and television noise) 
  • electromagnetic field effects 
  • insulation and over voltage design 
  • switching arrangements 
  • circuit-breaker duties 
  • protective relaying 




Mechanical Design includes 

  • Sag and tension calculations 
  • conductor composition 
  • conductor spacing (minimum spacing to be determined under electrical design) 
  • types of insulators 
  • selection of conductor hardware 


Structural Design 

  • selection of the type of structures to be used 
  • mechanical loading calculations 
  • foundations 
  • guys and anchors. 


Miscellaneous features 

  • line location 
  • acquisition of right-of-way 
  • profiling 
  • locating structures 
  • inductive coordination (considers line location and electrical calculations) 
  • means of communication 
  • seismic factors



REFERENCE : Standard Handbook for Electrical Engineers by Donald G. Fink and H.Wayne Beaty

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