Apr 2009
Electricity Transmission
Dynamic Line Rating CAT1
Apr 2009
Apr 2018
Scottish and Southern Electricity Networks and Scottish Hydro Electric Transmission
SSEN Future Networks Team
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Network Innovation Allowance
Low Carbon Generation and Overhead Lines
To install a CAT-1 Transmission Line Monitoring system on a SHE Transmission line and demonstrate whether it can enable dynamic line rating resulting in safe and cost-effective line operation close to its thermal rating.
  • Investigate the ease of integration of CAT-1 proprietary software with SHE Transmission’s SCADA system
  • Evaluate levels of additional capacity achievable on the trial line through use of the installed CAT-1 equipment
  • Verify the correlation between practical observations and the theoretical model already established
  • Investigate the extent to which the technology can be applied without need for physical line uprating
  • Estimate potential Capex and Opex savings from use of dynamic ratings based on the data obtained
The DLR system is intended to:

  • Increase generation output and allow further generation connections to the 132kV circuit

  • Raise Transmission capacity

  • Monitor sag in order to provide advance warning of impending clearance violations

  • Match line ratings to load and weather conditions.
The results of this project have potential for learning in the following areas:

  • Potential savings in Capex and Opex

  • Potential levels of additional transmission line capacity achievable by using the method

  • Unforeseen challenges and risks associated with dynamic ratings

  • Ease of integrating supplier proprietary systems with existing SCADA system

  • Complexity of system planning required in case of wider adoption of the method

The learning will be disseminated by conference presentations.