Investigating the Impact of Real-Time Thermal Ratings on Power Network Reliability

David M. Greenwood, Phil C. Taylor

Research output: Contribution to journalArticle (Academic Journal)peer-review

38 Citations (Scopus)
2 Downloads (Pure)


Real-Time Thermal Rating (RTTR) is a smart-grid technology that allows electrical conductors to operate at an enhanced rating based on local weather conditions. RTTR also provides thermal visibility of the network, making system operators aware if the actual rating drops below the static seasonal rating. This paper investigates how using these enhanced variable ratings affects power network reliability. A methodology has been developed to assess network reliability with variable conductor ratings. The effect of failures and uncertainties in the RTTR system are also considered, and the effect of the correlation between conductor ratings due to common weather conditions is built into the model. State sampling and sequential Monte Carlo simulations are used to estimate the reliability of the RBTS 6-bus test network. At low loading levels, the RTTR appears to reduce network reliability but actually illustrates occasions when the existing ratings are being unknowingly infringed. For higher loading, the network reliability is significantly improved by the use of RTTR, with reductions in loss of load expectation of up to 67%.
Original languageEnglish
Pages (from-to)2460-2468
Number of pages9
JournalIEEE Transactions on Power Systems
Issue number5
Publication statusPublished - 27 Feb 2014


  • Power system planning
  • power system reliability
  • smart grids
  • transmission lines

Fingerprint Dive into the research topics of 'Investigating the Impact of Real-Time Thermal Ratings on Power Network Reliability'. Together they form a unique fingerprint.

Cite this