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An Equivalent Heat Transfer Model Instead of Wind Speed Measuring for Dynamic Thermal Rating of Transmission Lines

Author

Listed:
  • Zhao Liu

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Honglei Deng

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Ruidong Peng

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Xiangyang Peng

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
    Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China)

  • Rui Wang

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
    Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China)

  • Wencheng Zheng

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Pengyu Wang

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Deming Guo

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Gang Liu

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

Abstract

With the increase in electricity demand, the ampacity calculation based on the dynamic thermal rating (DTR) technology is increasingly significant for assessing and improving the power transfer capacity of the existing overhead conductors. However, the DTR models now available present some inadequacies in measurement techniques related to wind speed. Therefore, it is essential to propose a new model instead of wind speed measuring in DTR technology. In this paper, the influence analysis of various weather parameters on the conductor ampacity is carried out by using the real weather data. Based on the analysis, it is confirmed that the impact of wind speed is significant, especially in the case of the low wind speed. Moreover, an equivalent heat transfer (EHT) model for DTR technology is proposed instead of wind speed measuring. For this EHT model, the calculation of conductor ampacity is realized through investigating the correlation of heat losses between the heating aluminum (Al) ball and conductor. Finally, combined with the finite element method (FEM), the EHT model proposed in this paper is verified by the Institute of Electrical and Electronic Engineers (IEEE) standard. The results indicate that the error of the EHT model is less than 6% when employing the steady thermal behavior of the Al ball to calculate the ampacity. The EHT model is useful in the real-time thermal rating of overhead conductors. It can increase the utilization of overhead conductors while also avoiding the limitation of the existing measurement techniques related to wind speed.

Suggested Citation

  • Zhao Liu & Honglei Deng & Ruidong Peng & Xiangyang Peng & Rui Wang & Wencheng Zheng & Pengyu Wang & Deming Guo & Gang Liu, 2020. "An Equivalent Heat Transfer Model Instead of Wind Speed Measuring for Dynamic Thermal Rating of Transmission Lines," Energies, MDPI, vol. 13(18), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4679-:d:410726
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    References listed on IDEAS

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    1. Michiorri, Andrea & Nguyen, Huu-Minh & Alessandrini, Stefano & Bremnes, John Bjørnar & Dierer, Silke & Ferrero, Enrico & Nygaard, Bjørn-Egil & Pinson, Pierre & Thomaidis, Nikolaos & Uski, Sanna, 2015. "Forecasting for dynamic line rating," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1713-1730.
    2. Jiashen Teh & Chia Ai Ooi & Yu-Huei Cheng & Muhammad Ammirrul Atiqi Mohd Zainuri & Ching-Ming Lai, 2018. "Composite Reliability Evaluation of Load Demand Side Management and Dynamic Thermal Rating Systems," Energies, MDPI, vol. 11(2), pages 1-15, February.
    3. Fan Song & Yanling Wang & Hongbo Yan & Xiaofeng Zhou & Zhiqiang Niu, 2019. "Increasing the Utilization of Transmission Lines Capacity by Quasi-Dynamic Thermal Ratings," Energies, MDPI, vol. 12(5), pages 1-13, February.
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