Decentralized coordinated emergency frequency control strategy for renewables-rich power systems based on multi-agent reinforcement learningSun, Zhenglong; Han, Junpeng; Chen, Weihan; Zhang, Rui; Liu, Yong; Levron, Yoash; Belikov, JuriInternational journal of electrical power & energy systems2025 / art. 111035, 13 p. : ill https://doi.org/10.1016/j.ijepes.2025.111035