Power System Resilience: An Overview of Current Metrics and Assessment Criteria Springer Nature Link

power system resilience

The North American Electric Reliability Corporation (NERC), which is responsible for developing reliability standards for the bulk power system, defines reliability in terms of two fundamental concepts. It should be robust enough to be reliable and have the ability to predict and prepare for potential outages. A resilient EPS should ensure an uninterrupted power supply, even in the face of minor faults and major disruptive events. Regardless of the reasons, one growing concern is that power outages result in economic losses and hardship for people who have become increasingly reliant on electricity for even basic comforts. As these events are rare, there is limited data available on their effects, which makes calculating the risks of the events challenging.

Analytical methods in which constraints are required to hold with a specified probability rather than under all conditions. A post-processing step that adjusts climate model output so that its statistical properties match those of observed data over a reference period. We formulate this concept of long-horizon resilience, set it against the event-based paradigm it replaces and develop a unified framework for studying, gauging and reinforcing it.

An early representation of power system resilience that captures both the depth of performance loss caused by a disturbance and the time taken to recover. An extension of the resilience triangle that additionally represents the degradation phase and the period of sustained reduced performance before recovery begins. The generation of high-resolution climate information by running a physics-based regional model within the boundary conditions supplied by a coarser global model. A planning approach that specifies a sequence of decisions together with the conditions under which the plan should switch to an alternative course of action.

Resilience metrics to guide back-up investments in the power system during extreme weather

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power system resilience

Reliability, Resilience, and Probability Applications (RRPA) Subcommittee, Task Force on Power System Resilience Metrics and Evaluation Methods

power system resilience

All authors contributed to the writing of the article. We then set out the scientific challenges this shift raises and a research agenda to address them. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

The goal of this report is to provide a road map for standardizing resilience metrics for power grids that align with ongoing industry efforts and regulatory requirements. Distributed energy resources are rapidly growing in some states, but most U.S. customers will continue to depend on the large-scale, interconnected, and hierarchically structured electric grid. These “smart grids” use improved sensing, communication, automation technologies, and advanced metering infrastructure. The use of automation at the high-voltage level can improve grid reliability, but also introduces cybersecurity vulnerabilities.

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In this Review we argue that resilience must be redefined as a long-horizon, event-independent property that governs power system performance across the range of futures a system may encounter. As extreme weather evolves and its uncertainties compound across decades, resilience measured event by event becomes variable and difficult to interpret, and offers no reliable basis for long-term planning. The report also identifies research gaps and future directions to enhance resilience measurement methodologies. The use cases presented in this report demonstrate how these metrics can be applied in practice and highlight their relevance across different decision-making contexts. This is a preview of subscription content, log in via an institution to check access. Resilience is not just about preventing these outages from happening, but also limiting their scope and impact, restoring power quickly, and preparing for future events.

Resilience, as defined by the Random House Dictionary of the English Language, refers to the ability to return to the original state after being stretched, compressed, or bent.
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The use cases presented in this report demonstrate how these metrics can be applied in practice and highlight their relevance across different decision-making contexts.
For example, a severe storm can knock out power to a large geographical area, while a cyberattack on the communication systems can disrupt the entire power grid.
The generation of high-resolution climate information by running a physics-based regional model within the boundary conditions supplied by a coarser global model.
Despite the efforts of utilities to prevent and mitigate large-scale power outages, they still occur and cannot be eliminated due to the numerous potential sources of disruption to the power system.

Additionally, the interdependence of different infrastructures, such as energy, transportation, and communication, can exacerbate the impact of a disruptive event. High-impact low-probability events can be caused by for example, extreme weather, human error, https://waste-recycling.info/WasteRecycling/grease-trap-waste-recycling ageing infrastructure or cyberattacks. The generation of high-resolution climate information by applying empirical relationships, established from historical data, between large-scale climate variables and local weather conditions.

power system resilience

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Additionally, the interdependence of different infrastructures, such as energy, transportation, and communication, can exacerbate the impact of a disruptive event.
Analytical methods in which constraints are required to hold with a specified probability rather than under all conditions.
Therefore, strategic resilience planning for mitigating the negative effects of future events requires a comprehensive approach that considers a range of potential disruptive events and their potential impact across the power system infrastructure.
As extreme weather evolves and its uncertainties compound across decades, resilience measured event by event becomes variable and difficult to interpret, and offers no reliable basis for long-term planning.
In the United States, electric utility firms have registered over 2500 significant power outages since 2002, with almost half of them (specifically 1172) attributed to weather events, including storms, hurricanes, and other unspecified severe weather occurrences.

Sorry, a shareable link is not currently available for this article. Power electronic converters that establish voltage and frequency references for the network, rather than synchronizing to an existing grid signal. Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Reviewed and revised the manuscript to enhance its technical depth and clarity. Conceptualized the idea and led the overall framework of the study.

Power System Resilience: An Overview of Current Metrics and Assessment Criteria

Therefore, strategic resilience planning for mitigating the negative effects of future events requires a comprehensive approach that considers a range of potential disruptive events and their potential impact across the power system infrastructure. Therefore, strategies to enhance electric power resilience must consider a diverse set of technical and institutional arrangements and a wide variety of hazards. However, the planners and operators of the system have made great efforts over many years to ensure that the electric system is engineered and operated with a high level of reliability.