ComEd Grid Labs-Why the Power Sector Needs Advanced Labs
The severity and frequency of severe weather events has risen in recent years due to climate change, while cyber-attacks have also become more of a threat as technological advances threaten to outpace cyber security. Stakeholders have recognized the imperative nature of supplying sustainable, resilient power to every community. The power industry, and particularly advanced utilities have been working tirelessly to ensure the resiliency of the power grid, and to lead the transformation into grid of the future. Labs play a particularly important role in this transformation as will enable an accurate and expedited system modeling and analysis. The paper discusses ComEd’s efforts, as the largest electric utility in the state of Illinois serving more than 4 million customers, to build and leverage advanced labs in designing the grid of the future.
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Strengthening Transmission System Resilience Against Extreme Weather Events by Undergrounding Selected Lines
Natural disasters, such as extreme weather events (EWEs), can cause significant damage to power systems. In fact, it is expected that the intensity and frequency of EWEs will increase the next years due to climate change, making power system resilience enhancement necessary. This paper proposes a transmission resilience planning solution by determining the lines to be placed underground in order to minimize load shedding in the most cost-efficient way taking into account historical EWEs (HEWEs).
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Robust Resiliency-Oriented Operation of Active Distribution Networks Considering Windstorms
Recent climate changes have created intense natural disasters, such as windstorms, which can cause significant damages to power grids. System resilience is defined as the ability of the system to withstand such high-impact low-probability events. This paper proposes a robust resilient operational schedule for active distribution networks against windstorms. In order to capture dynamic behaviors of these disasters, zonal disaster-specific uncertainty sets associated with the windstorm are proposed.
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From Reliability to Resilience: Planning the Grid Against the Extremes
Although extreme events, mainly natural disasters and climate change-driven severe weather, are the result of naturally occurring processes, power system planners, regulators, and policy makers do not usually recognize them within network reliability standards. Instead, planners have historically designed the electric power infrastructure accounting for the so-called credible (or “average”) outages that usually represent single or (some kind of) simultaneous faults (e.g., faults on double circuits).
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A Multi-State Model for Transmission System Resilience Enhancement Against Short-Circuit Faults Caused by Extreme Weather Events
Due to global climate change, the effect of extreme weather on power systems has attracted extensive attention. In the prior-art grid resilience studies, the hurricanes or wildfires are mainly defended in terms of expected line damages, while they are prone to trigger short-circuit fault (SCF) evolved with dynamic influence in reality. In this paper, a fragile model is developed to evaluate the nodal SCF probability considering the insulation aging of equipment and extreme weather condition.
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Resilience Enhancement With Sequentially Proactive Operation Strategies
Extreme weather events, many of which are climate change related, are occurring with increasing frequency and intensity and causing catastrophic outages, reminding the need to enhance the resilience of power systems. This paper proposes a proactive operation strategy to enhance system resilience during an unfolding extreme event. The uncertain sequential transition of system states driven by the evolution of extreme events is modeled as a Markov process. At each decision epoch, the system topology is used to construct a Markov state. Transition probabilities are evaluated according to failure rates caused by extreme events.
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Resilience Assessment of Distribution Systems Integrated With Distributed Energy Resources
The resilience of electric systems is receiving growing attention due to their increased vulnerability to infrastructure damages and widespread outages from frequent extreme climactic conditions attributed to global warming effects. Resilience evaluation methods should recognize the uncertainties and correlations in the performance variations of different types of energy resources, load characteristics, extreme events and their impacts on the grid elements.
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Performance Degradation of Levee-Protected Electric Power Network Due to Flooding in a Changing Climate
This paper presents a methodological framework to evaluate the resilience, with the primary focus on performance degradation, of levee-protected electric power networks to flooding in a changing climate. To this end, a multi-disciplinary framework is established by integrating climate science, hydrology, and electric power network analysis. The framework quantifies the effect of climate change on flood hazard levels in a levee-protected area and the subsequent changes in the resilience of the electric power network.
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