Challenges of renewable energy integration to weak grids

This paper presents the stability challenges of integrating large-scale renewable generations into the weak grid based on a review of literature and other public information. Moving from synchronous generator-based grids to converter-dominant power grids, various new types of power system stability problems are arising around the world. In this regard, first, definitions including classification of power system stability are reviewed considering the transition towards modern converter-dominated power systems. Then cases of stability challenges with converter-based generation in Australia, China, Hawaii, Texas, Chili, and Nigeria are reviewed, using publicly available information to describe the experienced stability challenges and solutions. Finally, the paper summarises viable solutions and the current challenges that still need to be addressed in these power systems.