原文信息：
Enhancing resilience of integrated electricity-gas systems: A skeleton-network based strategy
原文链接：
https://doi.org/10.1016/j.adapen.2022.100101
Highlights
•A skeleton-network framework is developed to identify the most important components.
•A two-stage strategy is proposed to enhance the overall resilience of coupled energy systems.
•Resilience enhancement is evaluated in terms of system functionality recovery.
•The modified Northwest China energy system is utilized to validate the effectiveness of the method.
Abstract
The increasing frequency of major energy outages in recent years has significantly affected millions of people around the world, raising extensive concerns about enhancing infrastructure resilience to withstand and quickly recover from disasters. However, the post-disaster recovery of infrastructure functionality has been hindered by the lack of interdependency modeling of energy networks and priority identification of components, resulting in long-duration energy supply scarcity, wide-ranging service disruption, and huge social losses. Here, a skeleton-network based strategy for enhancing the resilience of integrated electricity-gas systems (IEGSs) is proposed, which can provide a clear representation of which network components should be protected and how to determine the component recovery priority considering interdependencies of power and gas systems. Using the modified energy systems in New England and Northwest China, the skeleton-network is uncovered to quickly recover more than 90% of system functionality using less than 44.3% of total resources, and consumer-affected time by energy outages decreases by more than 53%. The analysis also indicates that compared to conventional methods, the skeleton-network based strategy performs best in improving infrastructure resilience. These results elucidate the implications of skeleton-networks on quick recovery of infrastructure functionality and demonstrate resilience enhancement methods that are applicable to a wider class of coupled infrastructure networks in hazard-prone areas.
Keywords
Integrated electricity-gas system
Skeleton-network
Resilience enhancement
Critical component
Recovery
Fig. 1. Overview of the IEGS skeleton-network and its social significance. (a) Illustration of critical nodes and lines. (b) An example of the IEGS skeleton-network, wherein critical nodes and lines with color are energized while others are not. Abbreviations: GFG, gas-fired generator; CFG, coal-fired generator; RES, renewable energy source; EDGS, electricity-driven gas source; EDGC, electricity-driven gas compressor; PtGF, power-to-gas facility; GDGS, gas-driven gas source; GDGC, gas-driven gas compressor
Fig. 2. Outline of the skeleton-network based resilience enhancement strategy for IEGSs.
Fig. 3. Schematic of the proposed MSSN optimization model.
Fig. 4. Logic flow of the modeling framework for the skeleton-network based resilience enhancement strategy. (a) Major procedure of the logic flow. (b) The procedure of implementing the emergency recovery model. (c) The procedure of implementing the preventive reinforcement model.
Fig. 5. Skeleton-network identification result of the New England power system with 20-node gas system.
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