A Repetitive Control Scheme Aimed at Compensating the 6k + 1 Harmonics for a Three-Phase Hybrid Active Filter

Zhaoxu Luo, Mei Su, Jian Yang, Yao Sun, Xiaochao Hou, Josep M. Guerrero

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15 Citations (Scopus)
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Abstract

The traditional repetitive controller has relatively worse stability and poor transient performance due to the facts that it generates infinite gain at all the integer multiples of the fundamental frequency, and its control action is postponed by one fundamental period (T0). To improve these disadvantages, many repetitive controllers with reduced delay time have been proposed, which can selectively compensate the odd harmonics or 6k±1 harmonics with delay time reduced to T0/2 and T0/3,repectively. To further study in this area, this paper proposes an improved repetitive scheme implemented in stationary reference frame, which only compensates the 6k+1 harmonics (e.g. -5, +7, -11, +13) in three-phase systems and reduces the time delay to T0/6 . So compared with the earlier reduced delay time repetitive controllers, the robustness and transient performance is further improved, the waste of control effort is reduced, and the possibility of amplifying and even injecting any harmonic noises into system is avoided to the greatest extent. Moreover, the proposed repetitive scheme is used in the control of a three-phase hybrid active power filter. The experimental results validate the effectiveness of the proposed repetitive control scheme.
Original languageEnglish
Article number787
JournalEnergies
Volume9
Issue number10
Number of pages17
ISSN1996-1073
DOIs
Publication statusPublished - Sept 2016

Keywords

  • Repetitive control
  • Harmonic compensation
  • Power quality
  • Hybrid active power filter

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