Real-Time Transient Thermal Rating and the Calculation of Risk Level of Transmission Lines

Jiapeng Liu, Hao Yang, Shengjie Yu, Sen Wang, Yu Shang and Fan Yang
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Jiapeng Liu: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
Hao Yang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
Shengjie Yu: Department of Urology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
Sen Wang: State Grid Shanxi Electric Power Corporation Research Institute, Xi’an 710054, China
Yu Shang: State Grid Shanxi Electric Power Corporation Research Institute, Xi’an 710054, China
Fan Yang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China

Energies, 2018, vol. 11, issue 5, 1-14

Abstract: With the increasing consumption of electric energy, how to improve the capacity of transmission lines within safe margins is an urgent problem to be solved. This paper presents a transient thermal rating method under real-time meteorological conditions. The result of thermal ratings under different conditions shows that this rating approach can significantly increase the capacity of the line. As some of the most critical variables are remaining time and initial temperature, their influence upon the rating is studied. The method of statistical analysis is used to determine the ampacity at different risk levels. The result indicates that with smaller remaining time, the ampacities are larger, and with larger ampacities, the risk of thermal overload is greater. The choice of risk level would heavily affect the values of ampacity.

Keywords: transient thermal rating; overhead transmission line; real-time meteorological conditions; risk level (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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