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电网技术  2011 

考虑天气变化的输电系统可靠性评估

, PP. 66-70

Keywords: 输电系统,可靠性评估,不确定性,联系数,天气模型

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Abstract:

电力系统可靠性评估的结果受天气变化的影响很大。常规处理天气变化的方法是根据天气情况的平均值对元件的平均故障率进行修正,得出不同天气状态下的平均故障率。但是故障率和天气情况均具有不确定性。为了考虑故障率和天气情况的不确定性对可靠性评估结果的影响,在3态天气模型可靠性评估的基础上,运用联系数处理故障率和天气情况的不确定性。根据联系数运算法则进行输电系统可靠性评估,得到具有联系数形式的可靠性指标。通过评估IEEE-RBTS输电部分的可靠性表明,提出的方法能够反映故障率和天气情况的不确定性对可靠性指标的综合影响,证明了该方法的合理性和有效性。

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