RT Journal Article T1 Alternate Arm Converter Energy Balancing under Parameter Variation A1 Wickramasinghe, Harith R. A1 Konstantinou, Georgios A1 Ceballos, Salvador A1 Pou, Josep AB Energy balancing of the alternate arm converter (AAC) is a major challenge and overlap period-based circulating current control methods are commonly used. Component parameter variation occurs due to tolerances, component aging, and internal faults leading to stored energy imbalances of modular voltage source converter (VSC) topologies. If not controlled, such variations can severely impact the operation of the AAC. Hence, component parameter variation is a key consideration for energy balancing of all sorts of modular VSC topologies, but has not been addressed in the existing literature for the AAC. This paper investigates the energy balancing capability of the AAC in high-voltage direct current (HVDC) applications under component parameter variations and proposes a compensation method to further improve its energy balancing performance. The effectiveness of the proposed method is verified in a real-Time model of an AAC-HVDC transmission system from widely accepted existing CIGRE benchmark models. SN 0885-8993 YR 2019 FD 2019-04 LK https://hdl.handle.net/11556/4373 UL https://hdl.handle.net/11556/4373 LA eng NO Wickramasinghe , H R , Konstantinou , G , Ceballos , S & Pou , J 2019 , ' Alternate Arm Converter Energy Balancing under Parameter Variation ' , IEEE Transactions on Power Electronics , vol. 34 , no. 4 , 8447305 , pp. 2996-3000 . https://doi.org/10.1109/TPEL.2018.2867223 NO Publisher Copyright: © 1986-2012 IEEE. NO Manuscript received July 3, 2018; revised July 31, 2018; accepted August 14, 2018. Date of publication August 26, 2018; date of current version February 20, 2019. This work was supported under Australian Research Council’s Discovery Early Career Research Award (DECRA-DE170100370). (Corresponding author: Harith R. Wickramasinghe.) H. R. Wickramasinghe and G. Konstantinou are with the School of Electrical Engineering and Telecommunications, UNSW Sydney, Sydney, NSW 2052, Australia (e-mail:,harith@unsw.edu.au; g.konstantinou@unsw.edu.au). DS TECNALIA Publications RD 28 jul 2024