Graph Algorithms for Topology Identification Using Power Grid Probing
Graph Algorithms for Topology Identification Using Power Grid Probing
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DOI：
10.1109/lcsys.2018.2846801
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发表时间：
2018-10-01
影响因子：
3
通讯作者：
Kekatos, Vassilis
中科院分区：
文献类型：
--
作者：
Cavraro, Guido;Kekatos, Vassilis
为了执行任何有意义的优化任务，配电运营商需要知道其电网的拓扑结构和线路阻抗。然而，配电网目前缺乏全面的计量基础设施。虽然智能逆变器被广泛用于控制目的，它们最近被提倡作为主动数据采集范例的手段：阅读由故意扰动逆变器注入引起的电压偏差，系统操作员可以潜在地恢复电网拓扑。采用逆变器探测馈线加工，一套基于图形的拓扑识别算法在这里开发。如果在所有叶节点探测电网，但在所有节点测量电压数据，则可以成功恢复整个馈线拓扑。当仅在探测总线处收集电压数据时，操作员可以找到具有关键属性和与实际馈线相似性的简化馈线。为了处理建模不准确和负载非平稳性，需要对有噪声的探测数据进行预处理。如果遵循关于探测的幅度和持续时间的建议准则，则可恢复性保证以高概率从无噪声设置延续到有噪声设置。
To perform any meaningful optimization task, power distribution operators need to know the topology and line impedances of their electric networks. Nevertheless, distribution grids currently lack a comprehensive metering infrastructure. Although smart inverters are widely used for control purposes, they have been recently advocated as the means for an active data acquisition paradigm: reading the voltage deviations induced by intentionally perturbing inverter injections, the system operator can potentially recover the electric grid topology. Adopting inverter probing for feeder processing, a suite of graph-based topology identification algorithms is developed here. If the grid is probed at all leaf nodes but voltage data are metered at all nodes, the entire feeder topology can be successfully recovered. When voltage data are collected only at probing buses, the operator can find a reduced feeder featuring key properties and similarities to the actual feeder. To handle modeling inaccuracies and load non-stationarity, noisy probing data need to be preprocessed. If the suggested guidelines on the magnitude and duration of probing are followed, the recoverability guarantees carry over from the noiseless to the noisy setup with high probability.