Division of Dynamics, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland.
Forschungszentrum Jülich, 52428 Jülich, Germany.
Chaos. 2023 Jan;33(1):011104. doi: 10.1063/5.0131931.
Dynamical stability of the synchronous regime remains a challenging problem for secure functioning of power grids. Based on the symmetric circular model [Hellmann et al., Nat. Commun. 11, 592 (2020)], we demonstrate that the grid stability can be destroyed by elementary violations (motifs) of the network architecture, such as cutting a connection between any two nodes or removing a generator or a consumer. We describe the mechanism for the cascading failure in each of the damaging case and show that the desynchronization starts with the frequency deviation of the neighboring grid elements followed by the cascading splitting of the others, distant elements, and ending eventually in the bi-modal or a partially desynchronized state. Our findings reveal that symmetric topology underlines stability of the power grids, while local damaging can cause a fatal blackout.
电力系统同步运行的动态稳定性仍是确保电网安全运行的一个具有挑战性的问题。基于对称圆模型[Hellmann 等人，《自然·通讯》11, 592 (2020)]，我们证明了电网稳定性可能会被网络结构的基本破坏（模式）所破坏，例如切断任意两个节点之间的连接，或者移除发电机或消费者。我们描述了每种破坏情况下的级联故障机制，并表明失步始于相邻电网元件的频率偏差，随后是其他元件、远距离元件的级联分裂，最终以双模态或部分失步状态结束。我们的研究结果表明，对称拓扑结构是电网稳定性的基础，而局部破坏可能会导致灾难性的停电。
