This article proposes a harmonic voltage injection pulsewidth modulation (PWM) method for a Vienna rectifier with an LCL filter. Existing PWM methods for Vienna rectifiers with full power factor can lead to resonance problems. It generates current oscillation at the resonant frequency. It is analyzed that why the resonance problem occurs in Vienna rectifier with the existing PWM methods. To solve these resonance problems, the proposed method injects a sinusoidal harmonic voltage into the sinusoidal reference voltage. The magnitude and phase of the injection voltage are determined by the power factor of the rectifier-side. Compared to other PWM methods, the proposed PWM method eliminates the possibility of resonant problems. Considering the operation characteristics of the proposed PWM method, this article suggests a design process for an LCL filter. The effectiveness and performance of the proposed PWM method and the design process for an LCL filter are verified by simulation and experiment.
Manuscript received January 27, 2020; revised May 17, 2020; accepted June 25, 2020. Date of publication July 23, 2020; date of current version October 30, 2020. This work was supported by Railroad Technology Research Program funded by Ministry of Land, Infrastructure and Transport of Korean Government under Grant 20RTRP-B146050-03. Recommended for publication by Associate Editor J. Biela. (Corresponding author: June-Seok Lee.) Jin-Hyuk Park is with the Electrification System Research Team, Korea Railroad Research Institute, Uiwang 16105, South Korea (e-mail: powerword@krri.re.kr).
