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On Enhancing Resilience to Cascading Failures via Post-Disturbance Tweaking of Line Reactances

机译:通过线路电抗的扰动后调整增强对级联故障的恢复能力

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The primary goal of this paper is to develop an optimization framework for studying the efficacy of transmission line reactance tweaking as a mechanism for post-disturbance control in a transmission network. We start by developing a mixed-integer linear programming (MILP) formulation for tracking the redistribution of direct current (DC) flows and the graph-theoretic evolution of a network topology over the course of cascading failures. Next, we propose a min-max setup for studying the impact of post-disturbance reactance tweaking on the resilience of the system to a worst-case disturbance. We devise a MILP reformulation scheme for the underlying bilevel non-convex mixed-integer nonlinear program to facilitate the computation of its globally optimal solution. We then develop a MILP framework for computing a tight upper bound (best-case scenario) on the efficacy of post-disturbance reactance tweaking for a given set of bus loads. Our numerical case study suggests that post-disturbance reactance tweaking, even on only a small number of lines, can be effective in reducing the amount of load shed in some scenarios in the tested system.
机译:本文的主要目标是开发一个优化框架,以研究传输线电抗调整的有效性,作为传输网络中扰动后控制的机制。我们首先开发一种混合整数线性规划(MILP)公式,以跟踪级联故障过程中直流(DC)流量的重新分布以及网络拓扑的图论演化。接下来,我们提出了一个最小-最大设置,以研究扰动后电抗调整对系统对最坏情况干扰的恢复力的影响。我们为底层的双层非凸混合整数非线性程序设计了一种MILP重新设计方案,以方便其全局最优解的计算。然后,我们开发了一个MILP框架,用于针对给定的一组母线负载,计算出扰动后电抗调整效率的严格上限(最佳情况)。我们的数值案例研究表明,即使仅在少数线路上进行扰动后电抗调整,也可以有效减少测试系统中某些情况下的负载减少量。

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