Jin, E. ., Z. . Song, X. . Yang, and X. . Yu. “Improved Thevenin Equivalent Model of MMC Considering Pre-Charge Conditions and DC Side Fault Conditions”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 36, no. 06, Nov. 2021, pp. 796-05, https://journals.riverpublishers.com/index.php/ACES/article/view/12095.