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首页> 外文期刊>Electric power systems research >Influence of the current front time representation on the assessment of backflashover occurrence of transmission lines by deterministic and probabilistic calculation approaches
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Influence of the current front time representation on the assessment of backflashover occurrence of transmission lines by deterministic and probabilistic calculation approaches

机译：当前正时间表示对概率计算方法对传输线路反射发生的评估的影响

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This work addresses the impact on the backflashover occurrence in transmission lines of two different assumptions for representing the front time of return-stroke currents, namely a constant parameter, set as the median Td30 front time, and a varying parameter, determined from expressions correlating the front time and the peak current. To support the analysis, computational simulations assuming the HEM-DE deterministic approach and the ATP-DE-MC probabilistic approach based on the application of Monte Carlo method were developed, taking typical configurations of 138-and 230-kV single circuit transmission lines as case studies. The results show that the two methods of representing the current front time lead to similar critical currents and, therefore, percentages of backflashover. The observed difference in the results demonstrated to be larger only for those cases in which the percentage of backflashover is extremely low (of the order of 1% or lower), and, therefore, do not contribute to modify the calculated outage rate of the transmission line, in most cases.
机译：这项工作解决了对表示返回行程电流的前时间的两种不同假设的传输线的影响，即常数参数，设置为中值TD30前时间，以及从相关性相关的表达式确定的变化参数。前时间和峰值电流。为了支持分析，开发了基于Monte Carlo方法的应用的下摆确定性方法和ATP-DE-MC概率方法的计算模拟，采用138和230 kV单电路传输线的典型配置学习。结果表明，代表当前前续时间的两种方法导致相似的关键电流，因此，反射率的百分比。所观察到的结果差异仅适用于那些反射率的百分比极低（1％或更低的顺序），因此，没有贡献修改传输的计算的中断率在大多数情况下。

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