Guest Editorial Towards Resilient Power Grids Integrated With High-Penetrated Renewable Energy Sources: Challenges, Opportunities, Implementation Strategies, and Future Perspectives

With the rise of environmental awareness and carbon emissions concerns, many regions in the world have growing integrations of renewable energy sources (RES) and energy storage into both conventional transmission grids and distribution grids in the past two decades. Even though the grid resilience can be indeed improved in some aspects, power electronics-based converters used for RES integrations can also alter dynamic characteristics of power grids with fast responses and less inertia. In addition, due to intermittent and uncertain characteristics of RES, the conventional power system is becoming more vulnerable to the new occurrence of new dynamics from mutual interactions among various RES infrastructures. Meanwhile, as extreme weather events are occurring more frequently and the threat of cyber-attacks is continuously growing, grid resilience has been an important issue in current industry practice, especially after the occurrence of the recent power outages in Texas. To ensure the resilience of modern power systems with highly penetrated RES to malicious and/or unexpected threats, it still remains an open problem in both industrial and academic sector for developing practical and valuable solutions to maintains situational awareness and an acceptable level of operational normalcy for a modern power grid with highly penetrated RES in response to disturbances.