Tension Prediction of Overhead Transmission Line Based on Electrothermal Coupling Power Flow in Operating Power Systems
Wang Mengxia1, Han Xueshan1, Wei Zhiqing2, Wang Mingqiang1, Zhang Qiang3
1. Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan 250061 China; 2. Yantai Power Supply Company of State Grid Shandong Electric Power Company Yantai 264000 China; 3. Shandong Power Dispatching and Control Center Jinan 250022 China
Abstract：The tension of conductor, which is related to its operating temperature and weather conditions is an important factor that determines its transfer capability and security operation. In this paper, the meteorological distribution along the overhead transmission lines is considered in electro-thermal coupling power flow calculation, and the inclined parabola state equation is utilized to calculate the temperatures and tensions of tensioning sections during the electro-thermal coupling process power flow calculation. By doing this, the distribution of temperature and tension of tensioning sections along the overhead lines under the anticipated operating scenarios of power systems can be predicted thus revealing the essential transfer capability of overhead lines. Finally, the validity of the proposed method is testified by case studies on a regional power grid.
王孟夏,韩学山,韦志清,王明强,张强. 电网运行环境下基于电热耦合潮流的架空线路应力预估[J]. 电工技术学报, 2019, 34(5): 1078-1087.
Wang Mengxia, Han Xueshan, Wei Zhiqing, Wang Mingqiang, Zhang Qiang. Tension Prediction of Overhead Transmission Line Based on Electrothermal Coupling Power Flow in Operating Power Systems. Transactions of China Electrotechnical Society, 2019, 34(5): 1078-1087.
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2019, Vol. 34 
