1. Nuclear and coal will account for majority of U.S. generating capacity retirements in 2021;Ray,2021
2. Renewables became the second-most prevalent U.S. electricity source in 2020;Francis,2021
3. 2020 Long-term reliability assessment;North American Electric Reliability Corporation,2020
4. Methodologies to determine operating reserves due to increased wind power;Holttinen;IEEE Trans Sustain Energy,2012
5. A review of power system flexibility with high penetration of renewables;Mohandes;IEEE Trans Power Syst,2019