Impacts of operating characteristics on sensitivity of power grids to cascading failures
Impacts of operating characteristics on sensitivity of power grids to cascading failures
复制标题
运行特性对电网连锁故障敏感性的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Hayat
中科院分区：
文献类型：
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作者：
M. Rahnamay;M. Hayat
通过考虑电网对其运行特性的关键依赖性，对电网对级联故障进行敏感性分析，是理解和减轻级联故障的重要一步。本文进一步分析了最近报道的概率级联故障模型，以提供关键证据，证明电网的可靠性关键取决于电网的运行特性，包括负载水平、减载约束和线路跳闸阈值。级联故障模型基于马尔可夫链，其转移概率具有受电力系统模拟启发的状态相关函数形式。通过对马尔可夫链模型的渐近分析，认为运行特性的某些变化使得电力系统容易发生大规模连锁故障，停电规模概率分布尾部的幂律行为证明了这一点。
Sensitivity analysis of power grids to cascading failures by means of considering their critical dependence on their operating characteristics is an important step toward understanding and mitigating cascading failures. In this paper, a recently reported probabilistic cascading-failure model is further analyzed to provide key evidence that the reliability of power grids critically depends on operating characteristics of the power grid including the loading level, load-shedding constraints and the line-tripping threshold. The cascading-failure model is based on a Markov chain whose transition probabilities have a state-dependent functional form that is inspired by power-system simulations. It is argued through the asymptotic analysis of the Markov-chain model that certain changes in the operating characteristics make the power system prone to large-scale cascading failures, as evidenced by a power-law behavior in the tail of the probability distribution of the blackout size.