考虑次生故障差异化影响下韧性主动提升的输电系统网架重构策略

A Novel Transmission Network Reconfiguration Strategy Considering Active Improvement of System Resilience Under the Differential Influence of Contingencies

近年来,我国能源电力加速转型,极端自然灾害频发,国际形势不稳定,使得常规安全风险与非常规安全风险交织,大停电风险有增加的趋势。稳健可靠的网架重构方案对防止恢复中再次发生系统崩溃具有重要意义,针对当前研究中未有效计及恢复中次生故障的不足,该文提出一种考虑次生故障差异化影响下系统韧性主动提升的网架重构策略。首先,讨论在网架重构恢复方案中考虑次生故障影响的必要性;然后,基于分割多目标风险分析方法提出一种系统韧性指标,旨在差异化处理次生故障并突出高风险故障对恢复过程的影响;进一步建立考虑韧性主动提升的网架重构全局优化模型,以增强系统对高风险故障的抵御能力。为提高模型的求解效率,提出一种基于窗口滚动机制的求解策略,可给出兼顾快速性与稳健性的网架重构方案。最后,采用新英格兰10机39节点系统和IEEE 118节点系统验证所提出方法的有效性。

In recent years,the green-oriented transition of energy has accelerated,extreme events have occurred frequently,and the international situation has been unstable.With the coexistence of conventional and unconventional security risks,the risk of power system outages increases.A robust and reliable network reconfiguration strategy is important to prevent the recurrence of collapse during restoration.Secondary faults or contingencies are rarely considered in the existing research on power system restoration.In view of that,this paper proposes a novel network reconfiguration strategy with active improvement of system resilience that considers the differential impact of contingencies.First,the necessity of considering the impact of contingencies in transmission network reconfiguration is discussed.Then,based on Partitioned Multi-Objective Risk Method(PMRM),a novel resilience index is proposed to differentiate contingencies and highlight the impact of high-risk failures.Then,a global optimization model for network reconfiguration considering the active improvement of resilience is established,which improves the resistance to high-risk contingencies.In order to improve the solution efficiency,a practical solution strategy based on the window rolling mechanism is proposed,which can provide a network reconfiguration scheme that considers both rapidity and robustness.The effectiveness of proposed method is verified by the IEEE 39-bus and IEEE 118-bus system.