控制过热线路跳闸减轻停电事故
Controlled Tripping of Overheated Lines Mitigates Power Outages
AI总结：
本文通过改进准静态级联模型，研究波兰输电网中过热线路跳闸顺序对停电规模的影响，发现控制跳闸可显著减轻极端紧急情况下的损害。
摘要：
我们研究了波兰（输电）电网模型（2700个节点和3504条输电线路）中快速停电级联的演化。级联由足够严重的初始意外跳闸引发，通过更多过热线路的连续跳闸传播，导致负荷和发电机孤岛，最终到达一个固定点，其中系统幸存部分功率流平衡，其余部分停电。利用我们早期研究（《电网级联故障的统计分类》，IEEE PES GM 2011）中引入的改进准静态级联传播模型，我们分析了级联严重程度如何取决于过热线路的跳闸顺序。我们的主要观察结果是，跳闸顺序对最终停电规模有巨大影响。找到“最佳”跳闸（即造成最小损害）构成一个困难的动态优化问题，其解决方案在计算上很可能不可行。相反，我们在这里研究了几种自然启发式方法的性能，这些方法基于电网当前状态决定下一个切换决策。总体而言，我们得出结论，在快速发展的极端紧急情况下，控制性有意跳闸是有利的，因为它能显著减轻造成的损害。
英文摘要：
We study the evolution of fast blackout cascades in the model of the Polish (transmission) power grid (2700 nodes and 3504 transmission lines). The cascade is initiated by a sufficiently severe initial contingency tripping. It propagates via sequential trippings of many more overheated lines, islanding loads and generators and eventually arriving at a fixed point with the surviving part of the system being power-flow-balanced and the rest of the system being outaged. Utilizing an improved form of the quasi-static model for cascade propagation introduced in our earlier study (Statistical Classification of Cascading Failures in Power Grids, IEEE PES GM 2011), we analyze how the severity of the cascade depends on the order of tripping overheated lines. Our main observation is that the order of tripping has a tremendous effect on the size of the resulting outage. Finding the "best" tripping, defined as causing the least damage, constitutes a difficult dynamical optimization problem, whose solution is most likely computationally infeasible. Instead, here we study performance of a number of natural heuristics, resolving the next switching decision based on the current state of the grid. Overall, we conclude that controlled intentional tripping is advantageous in the situation of a fast developing extreme emergency, as it provides significant mitigation of the resulting damage.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
