架空混合线路雷电过电压分析

L. B. Moraes, A. Piantini, M. Shigihara, A. Borgheui, F. Napolitano, C. Nucci, F. Tossani
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引用次数: 0

摘要

本文分析了与混合架空线(138千伏和13.8千伏线路共用同一结构)直接冲击相关的过电压。利用EMTP-RV计算了电压,并讨论了电压与冲击电流前时间、土壤电阻率和接地系统阻抗等参数的关系。重点介绍了中压电路上的电压。一个1:20比例的混合线路模型已经实现,并且在测量电压和计算电压之间有很好的一致性。
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Analysis of Lightning Overvoltages on Overhead Hybrid Lines
This paper analyzes the overvoltages associated with direct strokes to a hybrid overhead line (138 kV and 13.8 kV circuits sharing the same structures). The voltages are calculated using the EMTP-RV, and their dependence on parameters such as the stroke current front time, soil resistivity, and impedance of the grounding system is discussed. Emphasis is given to the voltages on the medium-voltage circuit. A 1:20 scale model of a hybrid line has been implemented, and a good agreement has been found between measured and calculated voltages.
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