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Determination of sectionalising strategies for parallel power system restoration: A spectral clustering-based methodology

机译：确定并行电力系统恢复的分段策略：基于频谱聚类的方法

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摘要

Parallel power system restoration (PPSR) accelerates the restoration of a system in complete blackout by restoring isolated sections (islands) of the network in parallel. These islands are defined during the preparation stage of PPSR using a sectionalising strategy that considers system information collected after the blackout and must satisfy multiple PPSR constraints. This paper introduces a methodology based on spectral clustering that, in contrast to existing approaches, uses the physical and inherent properties of the network to determine a suitable solution. An undirected edge-weighted graph is initially constructed based on the electrical distance between buses, and constraints related to transmission line availability and cranking groups are included by modifying the edge-weights of the graph and using a subspace projection. This graph is then used to define islands that have strong internal connections but weak external connections, whilst satisfying the following constraints: blackstart availability, load-generation balance, voltage stability and the ability to monitor synchronisation between adjacent islands. Simulation results for the Institute of Electrical and Electronic Engineers (IEEE) 39- and IEEE 118-bus test systems demonstrate the ability of the methodology to define a strategy that creates strongly connected islands. Additionally, they indicate that the new approach determines solutions that have larger ratios between the inter-cluster electrical distance and the intra-cluster electrical distance for larger systems.
机译：并行电源系统恢复（PPSR）通过并行恢复网络的隔离部分（孤岛）来加速完全停电的系统恢复。这些岛是在PPSR的准备阶段使用分段策略定义的，该策略考虑了停电后收集的系统信息，并且必须满足多个PPSR约束。本文介绍了一种基于频谱聚类的方法，与现有方法相反，该方法使用网络的物理和固有属性来确定合适的解决方案。最初基于总线之间的电气距离构建无向的边缘加权图，并通过修改图的边缘权重并使用子空间投影来包含与传输线可用性和启动组相关的约束。然后，该图用于定义具有强内部连接但弱外部连接的孤岛，同时满足以下约束：黑启动可用性，负载生成平衡，电压稳定性以及监视相邻孤岛之间同步的能力。电气和电子工程师协会（IEEE）39和IEEE 118总线测试系统的仿真结果证明了该方法能够定义创建牢固连接的孤岛的策略的能力。此外，它们表明，对于较大的系统，新方法确定的解决方案在集群间电气距离和集群内电气距离之间具有更大的比率。

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