Transmission Line Monitoring and Rating


COURSE OBJECTIVE AND SUMMARY

This seminar explores the process of placing and analyzing line monitor data to yield accurate static and dynamic line thermal capacity. Includes analysis of ambient-adjusted line rating methods of improving line safety when used. Comparison of monitoring devices and their reliability is a key part of the seminar.

SEMINAR SCHEDULE

   
   
  Introductions & Discussion
  • Instructor background & experience
  • Student interest and experiences in Line Monitoring
  • Quiz questions
   
  Overview of Dynamic Ratings (IEEE Tutorial)
  • Thermal heat balance calculation -- I vs Tc
  • Conductor temperature limits
  • Line ratings – static & dynamic
  • What monitors exist
  • Weather, conductor temperature or sag-tension
  • Integration into system operations
   
   
   
  Static and Dynamic Line Ratings
  • Static Ratings
      - Continuous
    - Emergency
    - Transient (less than 30 min)
  • Dynamic Ratings
      - Comparison to Static
    - Integration into Operations
    - Prediction, volatility, and duration
   
  Field Monitors for Dynamic Line Ratings
  • Weather instruments
      - Solar Pyranometer
    - Air Temp Sensor
    - Anemometers
  • Temperature monitors
      - Power donuts
    - EPRI Monitor
    - Vibrec & Micca
   
   
   
  Field Monitors for Dynamic Line Ratings (cont)
  • Sag-tension Monitors
      - CAT-1 Tension Monitors
    - Sagometer
    - Promethean B Field Sensors
  • Vibration Monitors
   
  Conductor Temp For LiDAR & Ground Survey
  • Based on Weather Monitors
  • Based on multiple anemometers
  • Based on Conductor Temp Measurement
      - Position of conductor in space
    - Temperature for LiDAR
   
   
   
  Selection of Line Rating Weather Assumptions
  • CIGRE TB 299
  • Thermal elongation rate uncertainty
      - Tension sharing between AL and ST strands in ACSRe
  • Weather conditions
      - Low speed wind
    - Solar heating
  • OHLOAD Approach
   
  Future Developments