Budget-Constrained Reinforcement of SCADA for Cascade Mitigation
Budget-Constrained Reinforcement of SCADA for Cascade Mitigation
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DOI：
10.1109/icccn52240.2021.9522250
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发表时间：
2021-07
期刊：
影响因子：
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通讯作者：
Vajiheh Farhadi;Sai Gopal Vennelaganti;Ting-nian He;N. Chaudhuri;T. L. Porta
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文献类型：
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作者：
Vajiheh Farhadi;Sai Gopal Vennelaganti;Ting-nian He;N. Chaudhuri;T. L. Porta
研究了通信与电网耦合对基于scada的预防控制系统的影响。今天，电网使用电力线在电网中的组件和使用电力线载波通信（PLCC）的控制中心之间传递控制信息。因此，电网的故障将导致控制网络的故障，并可能降低预防性控制的能力，从而增加级联故障的风险。我们提出了分配有限数量的非plcc通信链路（例如微波链路）的问题，这些链路不受电网故障的影响，以最大限度地提高我们在电力系统故障下对电网的可控性，从而最大限度地提高级联末端服务的总需求。通过将该问题形式化为非线性整数规划问题，建立了该问题的难易度，并确定了一种能在可控时间内找到近似解的通用启发式算法。我们进一步开发了一个特定于领域的启发式算法，该算法利用图论和电力系统信息，以更低的计算复杂度实现与通用启发式算法相似的性能。我们基于2383总线波兰系统的评估表明，只有少数非plcc链路，当放置正确时，可以通过级联末端服务的总需求来大幅提高电网的稳健性。
We study the impact of coupling between the communication and the power networks as it affects a SCADA-based preventive control system. Today power grids use power lines to carry control information between components in the grid and a control center using power line carrier communication (PLCC). Thus a failure in the power grid will cause a failure in the control network and may reduce the capability of preventive control that in turn increases the risk of cascading failures. We pose the problem of allocating a limited number of non-PLCC communication links (e.g., microwave links) that are immune to failures in the power grid to maximize our controllability over the grid under power system failures, so as to maximize the total demand served at the end of cascade. By formulating the problem as a nonlinear integer programming problem, we establish its hardness and identify a generic heuristic that can find an approximate solution within controllable time. We further develop a domain-specific heuristic that utilizes both graph-theoretic and power system information to achieve similar performance as the generic heuristic at a much lower computational complexity. Our evaluations based on a 2, 383-bus Polish system demonstrate that only a few non-PLCC links, when placed correctly, can substantially improve the robustness of the grid as measured by the total demand served at the end of cascade.