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

The resilience of power systems plays a vital role in today’s world, where increasing reliance on a stable energy supply has faced numerous challenges, such as extreme weather conditions, cyber and military threats, and ever-changing demand. The resilience of a power system indicates its ability to withstand and recover from a variety of deviations, providing uninterrupted service to its customers. There are many uncontrollable factors that affect the sustainability, reliability and adaptability of power sector. Therefore, an integrated approach is used to ensure stability in the power sector, covering all components of the energy chain, from production to energy consumption, while taking into account potential risks. The main task of ensuring stability in the power sector in modern conditions is to increase its resilience. The need to strengthen infrastructure and respond quickly through uncontrollable processes such as military threats, natural disasters, as well as an increase in cyberattack incidents, underscores the importance of resilience in the areas of management, optimization and protection of power systems. Power systems with high resilience can more effectively withstand challenges, minimize the consequences of unforeseen events, and recover faster from various disturbances. In the face of global climate change, technological advances and political instability, the importance of the ability of power systems to adapt to a variety of challenges is growing. The article defines the prerequisites and necessity for studying resilience, as well as the relevance of this topic for energy security. A detailed review of existing methodologies and metrics for assessing resilience is presented, taking into account their advantages and disadvantages. The focus is on practical methods for measuring resilience, in particular how they can be implemented in the real conditions of power systems. Applicable resilience assessment and quantification include topology, reliability, robustness, stability and recovery metrics and as a result indicate such power system features as preparedness, regenerative capacity and adaptability. The application of these metrics allows to design, modernize and manage power systems in such a way as to minimize the risks of failure.