Study on Thermal Load Capacity of Transmission Line Based on IEEE Standard

Fan Song, Yanling Wang, Lei Zhao, Kun Qin, Likai Liang, Zhijun Yin and Weihua Tao
Volume: 15, No: 3, Page: 464 ~ 477, Year: 2019
10.3745/JIPS.04.0114
Keywords: Dynamic Thermal Rating, Key Parameters, Thermal Equivalent Equation, Thermal Load Capacity, Transmission Line
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Abstract
With the sustained and rapid development of new energy sources, the demand for electric energy is increasing day by day. However, China’s energy distribution is not balanced, and the construction of transmission lines is in a serious lag behind the improvement of generating capacity. So there is an urgent need to increase the utilization of transmission capacity. The transmission capacity is mainly limited by the maximum allowable operating temperature of conductor. At present, the evaluation of transmission capacity mostly adopts the static thermal rating (STR) method under severe environment. Dynamic thermal rating (DTR) technique can improve the utilization of transmission capacity to a certain extent. In this paper, the meteorological parameters affecting the conductor temperature are analyzed with the IEEE standard thermal equivalent equation of overhead transmission lines, and the real load capacity of 220 kV transmission line is calculated with 7-year actual meteorological data in Weihai. Finally, the thermal load capacity of DTR relative to STR under given confidence is analyzed. By identifying the key parameters that affect the thermal rating and analyzing the relevant environmental parameters that affect the conductor temperature, this paper provides a theoretical basis for the wind power grid integration and grid intelligence. The results show that the thermal load potential of transmission lines can be effectively excavated by DTR, which provides a theoretical basis for improving the absorptive capacity of power grid.

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Cite this article
IEEE Style
F. Song, Y. Wang, L. Zhao, K. Qin, L. L. Yin and W. Tao, "Study on Thermal Load Capacity of Transmission Line Based on IEEE Standard," Journal of Information Processing Systems, vol. 15, no. 3, pp. 464~477, 2019. DOI: 10.3745/JIPS.04.0114.

ACM Style
Fan Song, Yanling Wang, Lei Zhao, Kun Qin, Likai Liang, Zhijun Yin, and Weihua Tao. 2019. Study on Thermal Load Capacity of Transmission Line Based on IEEE Standard, Journal of Information Processing Systems, 15, 3, (2019), 464~477. DOI: 10.3745/JIPS.04.0114.