Definition Sheet

Overview
TODEM

Overhead transmission lines are subjected to extreme events that may damage line sections and affect power supply to customers. Even when the best design criteria are met, there continues to be a risk of extensive damage to overhead lines when structural loads exceed the design criteria.  Experiences with several devastating events such as the ice storm in Canada and the north eastern U.S. in 1998, the major wind storm event in France in 1999 and the major icing event in China in 2008, along with hurricanes and high intensity winds (HIW) recently occurring in many countries, have demonstrated the significant devastation that severe weather causes to transmission systems. These problems may best be addressed by a better understanding of these issues through gaining knowledge in the subject areas, improving current technologies and by sharing needed research efforts as well as closing the existing “knowledge gaps” in the industry.  The objective of this interest group is to develop and share strategies to deal with overhead transmission line design issues and to mitigate the impact of extreme events, develop benchmarks for increased utilization of existing lines as well as the design of new lines, address corrosion of transmission components, develop containment strategy against line cascade and develop technologies to reduce life cycle costs.

Topics and Issues:

  • Extreme Events
  • Maximizing Availability/ Utilization of ExistingTransmission Lines
  • Investigation of New Technologies
  • Development of New Transmission Lines – Constraints: Environmental, Visual, Structural
  • Understanding Resiliency Issues and its Impact on LineDesign
Program Services
  • Networking & Information Sharing

    • Annual face-to-face Business Meetings with webinar call-in options
    • 4-5 conference calls and learning webinars
    • Access to a network of ~1,000 electrical utility peers from around the world
  • Industry Benchmarking

    • Requests for Information where your questions or concerns are circulated to other group
      participants with rapid-fire response rates
    • Internal benchmarking surveys for state-of-the-industry intelligence
  • Collaborative Technical Projects

    • The flexibility to support only those projects which are relevant to your organization, meaning you know exactly, where your research dollars are going
    • Supported by CEATI management, participating utilities and consultants work together across all phases of a project’s life-cycle, ensuring your organization receives practical, high-quality deliverables
  • Unparalleled Return on Investment

    • Ability to split project funding costs with other organizations, resulting in highly-leveraged funding opportunities
    • Reduced pricing on published reports, training courses, and industry-open conferences
Project Portfolio

Ongoing Projects


T143700 3396
Transmission Line Corrosion Control Manual- Grillage Foundations, Anchor Rods and Direct Embedded Steel Members
T143700 3399
State of the Art Report on Design Practices for Long Span/Tall Transmission Tower Systems
T143700 3395
Design Guide for Anti-Cascading Structures
T143700 3398
Best Practices Guide for EHV AC Transmission Lines (230 kV - 765 kV)
T153700 33102
Application of Transmission Structures for Under-built and Other Uses
T153700 33104
Guidelines to Establish Reliability of Existing Transmission Lines
T153700 33105
Technology Review on Integrity Testing of Concrete Drilled Shaft Foundations
T153700 33106
Performance and Control of Vibrations of HTLS Conductors
T163700 3270
New Below Ground Coatings For Direct Embedded Steel Pole Transmission Line Structures And Assessment Of Existing Coatings And Methods Of Repair
T163700 33112
Guidelines for Compact Line Design
T163700 33111
Guidelines for Assessment of Existing Foundations
T163700 33110
Residual Life Estimation of NCI Insulators
T163700 33109
Dynamic Loads on Lines due to Ice Shedding Phenomenon
T163700 33108
Impact of Climatological Influences on Overhead Line Design
T173700 33114
Guidelines for Optical Ground Wire Technology
T173700 33116
Review of Sensor Technologies in Monitoring Foundation Movements, Vibration Detection, Insulator Leakage and Ampacity
T173700 33115
Innovative New Structures (Aesthetic Structures) for Better Public Acceptance
T173700 33113
Understanding and Development of a Database for Line Failures
T173700 3272
TR: Guidelines for Managing Transmission Line Clearances

Completed Projects


T153700 33101
State of the Art report on Designing Transmission Lines for Wet Snow Accumulation
T153700 33103
Seismic Effects on Transmission Lines and its Major Components
T153700 33107
Guide for Transmission Line Foundations with Least Impact to Environment
T143700 3397
Review of Non-Ceramic Insulator Standards, Manufacturer Practices and Design Information
T143700 3260-33/100
Prevention, Assessment and Remediation of Corrosion in Corten Steel Transmission Line Structures
T143700 3256
TR: Guide for Cathodic Protection of Transmission Line Structures
T133700 3393
Dynamic Response of Transmission Lines under Wind
T133700 3391
Guide for Fire Protection of Transmission Lines
T133700 3390
Best Practices for Design of Transmission Line Structures Located in Water for Protection against Additional Loads Imposed During Floods and Foundation Scour
T133700 3250
TR: Historic Transmission Line Structure Design Practices Compared to Today’s Practices and Requirements
See all reports
Webinars

Webinar Library

Vibratory Caissons
Available to Utilities Only   Get Access
September 2017
PSPO: Lessons Learned in AC / DC Transmission Line Conversion Studies Performed for Utilities
Available to Utilities Only   Get Access
February 2017
Fiber-optic sensing system for icing detection and dynamic ampacity rating on overhead power lines
Available to Utilities Only   Get Access
February 2016
Dynamic Line Rating using SMARTLINE™ Ratings
Available to Utilities Only   Get Access
May 2013
Upcoming Events
TODEM 2018 Spring Meeting
Attendance Open to Electrical Utilities   Request Invitation
May 2018 in Saint Louis, MO
CEATI Transmission Conference: Reliability, Security Restoration and Safety Considerations in Design, Planning & Asset Management
Attendance Open to Electrical Utilities   Request Invitation
November 2018 in Tucson, AZ
News