An Integrated Approach for Failure Mitigation & Localization in Power Systems

An Integrated Approach for Failure Mitigation & Localization in Power Systems
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缓解故障的综合方法

DOI:
10.1016/j.epsr.2020.106613
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发表时间:
2020
期刊:
Portugal (online
影响因子:
--
通讯作者:
Wierman, Adam
Wierman, Adam
中科院分区:
--
文献类型:
--
作者:
Liang, Chen;Guo, Linqi;Zocca, Alessandro;Yu, Shuyue;Low, Steven;Wierman, Adam

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输电网通常由多个控制区域组成,这些控制区域通过网状结构中的多条联络线连接起来,以提高可靠性。众所周知,线路故障可以非局部传播,冗余可以加剧级联。在本文中,我们提出了一种电网可靠性的综合方法:(i)明智地关闭少量联络线,使控制区域以树形结构连接;(ii)利用统一的频率控制范例实时提供拥塞管理。尽管所提出的拓扑结构减少了冗余,但区域级树形结构和实时拥塞管理的集成可以为故障定位和缓解提供更强的保证。我们在IEEE 39总线网络上说明了我们的方法,并评估了其在IEEE 118总线、179总线、200总线和240总线网络上具有各种网络拥塞条件的性能。仿真结果表明,与传统方法相比,该方法不仅可以在更多故障场景下防止负载脱落,而且在不可避免的负载脱落场景下产生更小的负载损失。此外,在我们的方法下,发电机以本地方式更积极有效地调整其运行。
The transmission grid is often comprised of several control areas that are connected by multiple tie lines in a mesh structure for reliability. It is also well-known that line failures can propagate non-locally and redundancy can exacerbate cascading. In this paper, we propose an integrated approach to grid reliability that (i) judiciously switches off a small number of tie lines so that the control areas are connected in a tree structure; and (ii) leverages a unified frequency control paradigm to provide congestion management in real time. Even though the proposed topology reduces redundancy, the integration of tree structure at regional level and real-time congestion management can provide stronger guarantees on failure localization and mitigation. We illustrate our approach on the IEEE 39-bus network and evaluate its performance on the IEEE 118-bus, 179-bus, 200-bus and 240-bus networks with various network congestion conditions. Simulations show that, compared with the traditional approach, our approach not only prevents load shedding in more failure scenarios, but also incurs smaller amounts of load loss in scenarios where load shedding is inevitable. Moreover, generators under our approach adjust their operations more actively and efficiently in a local manner.
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