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Transmission Line Design

 
Learn a wide variety of design subjects at a level appropriate to those relatively new to the area of transmission line design. Explore the fundamentals for the electrical, civil, and structural design components of electric transmission lines. Examine industry practices, technical requirements, configuration philosophies, design practices, information resources and work procedures and presented. Topics covered include conductor types, sag and tension calculations, insulation and hardware, structure loading, codes and standards, clearances, foundations, ice and wind loading, and environmental coordination.

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Day One
1. Basic Overview 1 hour
Discussion of Overhead Transmission Line Design considerations
" Transmission Lines as a System
o Electrical Fundamentals for Transmission Lines
o Towers, Poles, and Conductors
o Insulation
o Line Protection
" Structural Loading
" Codes and Clearances
" Standard Transmission Voltage Levels
" Environmental Impacts

2. Required Conductor Clearances 2 hours
Discussion of National Electrical Safety Code and its impact on Line Design.
" Vertical Clearances
" Horizontal Clearances
" Minimum Clearances
" Structure Clearances
" ROW Clearances
" Joint Use Clearances
" Navigable Waterway Clearances
" FAA Height Restrictions
" Sag Charts

3. Mechanical Loads on Structures 2 hours
Discussion of weather data and how lines are designed to withstand loads placed upon them from the wind, ice accretion (buildup), and in combination.
" Conductor Tension
" Wind Speed
" Ice Loading
" Construction Loads
" Potential for Uplift
" Air Break Switches
" Wireless Communication Antennas

4. Insulators 1 hour
Discussion of ceramic, glass and polymer insulators and the advantages of each.
" Suspension Type
" Post Type
" V Strings
" Switching Surges
" Lightning Surges
" Leakage Distance
" Contamination Considerations
" Insulation Coordination
" Mechanical Design Considerations

5. Conductors 2 hours

Discussion of the types of conductors (ACSR, ACAR, high strength steel, etc.) and their electrical and mechanical characteristics including ampacity, sag, allowable tensions, vibration and vibration damping.
" Conductor Selection
o Ampere Rating
o Evaluation of Losses
o Corona Levels/EMF
o Physical Loading
" Bundled Conductors
" Conductor Movement
o Insulator Swing
o Blowout
o Aeolian Vibration
o Galloping
o Ice Shedding
" Accessories
o Fittings
o Aerial Markers
o Spacers
o Dampers
" Standardization

Day Two
6. Overhead Ground Wires 1 hour
Discussion of the types of overhead ground wire (EHS, EHSS, Alumoweld, OPGW, etc.) and their effectiveness for lightning protection.
" Shielding Angle
o Positive
o Negative
" Fault Current
" Fiber Optic Communication

7. Noise 1 hour
Discussion of noise mitigation methods (Audible, RI, TVI, etc.)
" Causes and preventions
" Methods of Measurement

8. Structure Design 2 hours
Discussion of structural design of wood and steel support structures
" Loading Tables
o Vertical Loads
o Horizontal Loads
o Longitudinal Loads
" Overload Factors
" Structure Family
o Tangent Structures
o Angle Structures
o Strain Structures
o Terminal Structures

9. Foundation Design 2 hours
Discussion of foundation installation techniques and types.
" Geotechnical Surveys
" Guys and Anchors
" Lattice Towers
" Tubular Steel Poles
o Direct embedment
o Anchor Bolt Type
" Soil Types

10. Grounding 1 hour
Discussion of structure grounding methods.
" Ground Resistivity
" Ground Resistance
" Ground Rods
" Counterpoise
" Adjacent Facilities
o Other Lines
o Fences
o Pipelines
" Safety Grounds for Personnel

Day Three* (*1/2-day)
11. Environmental Coordination 1 hour
Discussion of the role of the engineers and designers in supporting environmental assessments of proposed transmission line projects.
" Construction Impacts
" Land Use
" Laydown Yards
" Access Roads
" Temporary and Permanent Impacts
" Visual Impacts
" EMF Considerations
" Plan of Development

12. Project Schedule 2 hours
Discussion of key milestones for proposed transmission line projects.
" Notice of Intent
" Preliminary Corridor Selection
" Right of Way Acquisition
" Geotechnical Surveys
" Tower Spotting
" Detailed Design
" Procurement and Shop Fabrication
" Construction

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Benefits and Learning Outcomes

  • Examine industry practices, technical requirements, configuration philosophies, design practices, information resources and work procedures
  • Understand mechanical loads on structures and foundation design
  • Learn about conductor types, sag and tension calculations, insulation and hardware, structure loading, codes and standards, clearances, foundations, ice and wind loading, and environmental coordination

Close ▲

 

This program can be applied toward the:

  Sessions  
Dates and locations to be announced.
Fee: $1195
CEUs: 2.0
  Resources  
  Transmission Line Design course details PDF
 
Email us with your interest, contact:
Murali Vedula, mvedula@uwm.edu, 414-227-3121
Marcia Gabriel, gabrielm@uwm.edu, 414-227-3378
 

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