RT Journal Article
T1 Enhancing Inductive Operation of Low-Capacitance Cascaded H-Bridge StatComs Using Optimal Third-Harmonic Circulating Current
A1 Rodriguez, Ezequiel
A1 Leyva, Ramon
A1 Liu, Qingxiang
A1 Townsend, Christopher
A1 Farivar, Glen
A1 Ceballos, Salvador
A1 Pou, Josep
AB The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited operating range in the inductive region compared to a conventional StatCom due to the inherent large oscillations on the capacitor voltages. This limitation constitutes a great drawback of CHB LC-StatComs. This article presents an effective hardware-free solution to overcome this drawback. The proposed solution is based on the injection of an optimal third-harmonic circulating current to suitably shape the capacitor voltages aiming at avoiding overmodulation. Considering all the effects of the third-harmonic circulating current, the article proposes a reference design that guarantees a prescribed safe operating voltage limit, thus increasing the operational range of the LC-StatCom. The proposed approach takes into account the inherent induced oscillation on the capacitor voltages. This approach has been verified by simulation and experimentally with a laboratory prototype, corroborating the excellent performance that agrees with the theoretical analysis.
SN 0885-8993
YR 2021
FD 2021-09
LK https://hdl.handle.net/11556/4568
UL https://hdl.handle.net/11556/4568
LA eng
NO Rodriguez , E , Leyva , R , Liu , Q , Townsend , C , Farivar , G , Ceballos , S & Pou , J 2021 , ' Enhancing Inductive Operation of Low-Capacitance Cascaded H-Bridge StatComs Using Optimal Third-Harmonic Circulating Current ' , IEEE Transactions on Power Electronics , vol. 36 , no. 9 , 9369068 , pp. 10788-10800 . https://doi.org/10.1109/TPEL.2021.3063608
NO Publisher Copyright: © 1986-2012 IEEE.
NO Manuscript received August 3, 2020; revised October 28, 2020 and January 5, 2021; accepted February 25, 2021. Date of publication March 3, 2021; date of current version June 1, 2021. This work was supported by the Singapore Ministry of Education Academic Research Fund Tier 1 under Grant 2017-T1-001-213 (RG 90/17), and in part by the NTU Start-Up Grant #000603-00001: Compact and Reliable Power Converters. Recommended for publication by Associate Editor K. Wada. (Corresponding author: Ezequiel Rodriguez.) Ezequiel Rodriguez and Josep Pou are with the School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore (e-mail: ezequiel001@e.ntu.edu.sg; josep.pou@ieee.org).
DS TECNALIA Publications
RD 28 jul 2024