Quantitative Resilience Assessment under a Tri-Stage Framework for Power Systems

Abstract

The frequent occurrence of natural disasters and malicious attacks has exerted unprecedented disturbances on power systems, accounting for the extensive attention paid to power system resilience. Combined with the evolving nature of general disasters, this paper proposes resilience assessment approaches for power systems under a tri-stage framework. The pre-disaster toughness is proposed to quantify the robustness of power systems against potential disasters, where the thinking of area division and partitioned multi-objective risk method (PMRM) is introduced. In the case of information deficiency caused by disasters, the during-disaster resistance to disturbance is calculated to reflect the real-time system running state by state estimation (SE). The post-disaster restoration ability consists of response ability, restoration efficiency and restoration economy, which is evaluated by Sequential Monte-Carlo Simulation to simulate the system restoration process. Further, a synthetic metric system is presented to quantify the resilience performance of power systems from the above three aspects. The proposed approaches and framework are validated on the IEEE RTS 79 system, and helpful conclusions are drawn from extensive case studies.

Identifying Optimal Portfolios of Resilient Network Investments Against Natural Hazards, With Applications to Earthquakes

“…In the context of resilience assessment, [14] proposed four phases to assess power system resilience: threat characterization, vulnerability assessment of system components, system response and system restoration. Similarly, reference [15] proposes a resilience assessment method divided into three stages: hardness before disasters, resistance during disasters and capacity of restoration after disasters. Besides this multitemporal perspective, in [16] a fragility model of the transmission system is developed that also emphasizes the multiregional component within the probabilistic methodology proposed for resilience assessment.…”

Component importance assessment of power systems for improving resilience under wind storms

“…At each time unit, the repair crew can only repair a component or travel from one component to another. According to (1) and (5), we have:…”

“…Reliability is one of the basic requirements on the power supply. Recently, with the rapid development of theories, technologies, equipment, etc., the reliability performance of the power systems has been improved significantly [1]. However, when facing extreme events such as natural disasters and man-made attacks, power systems do not always perform well [2].…”

Collaborative Optimization of Post-Disaster Damage Repair and Power System Operation

“…After the acquisition of the repair and the system restoration scheme, the anticipated restoration effects can be assessed by the method proposed in [5], which helps to reflect the effectiveness and economic benefits of the strategy and compare the pros and cons of different restoration scenarios.…”

“…According to [4], power system resilience is "the ability of the power system to anticipate high-impact low-probability events, rapidly recover from these disruptive contingencies and absorb lessons for adapting its operation and structure for preventing or mitigating the impact of similar In the previous power system post-disaster resilience improvement studies, concentrations are focused more on the restoration after large-scale blackouts, while the researches are primarily carried out from three aspects: black-start [20][21][22], network reconfiguration [23][24][25] and load restoration [26,27]. However, the interconnection of regional large power systems, reasonable protection and automatic devices, along with advanced alarm processing and fault diagnosis technology, can restrict most electrical faults and accidents in local areas [5]. Therefore, the happening probability of extreme weather events leading to large-scale blackouts is tiny.…”