Active DC-link capacitor harmonic current reduction in two-level back-to-back converter

Lei Shen, Serhiy Bozhko, Greg Asher, Chintanbai Patel, Patrick Wheeler

Research output: Journal PublicationArticlepeer-review

36 Citations (Scopus)
77 Downloads (Pure)


The paper proposes a method of active switching harmonics current reduction in the DC-link capacitor of a two-level, three-phase, back-to-back converter. Based on the derived analytical solution for switching harmonic currents in the DC-link, it is shown that by specific control over the PWM carriers’ phase angles, the targeted harmonics of the rectifier and the inverter can be synchronized in phase such that their cancellation occurs in the DC-link capacitor. This synchronization is provided by harmonic phase feedback control. The three step procedure to implement the method is detailed in the paper. The effectiveness of the proposed approach is verified experimentally.
Original languageEnglish
Pages (from-to)6947-6954
JournalIEEE Transactions on Power Electronics
Issue number10
Publication statusPublished - 22 Dec 2015


  • Converters, AC-DC Power Conversion, Capacitors, Control, Harmonic Distortion, Switching Functions, Power Quality, Pulse-Width Modulation, Testing


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