Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Fast-Transient Repetitive Control Strategy for a Three-phase LCL Filter-based Shunt Active Power Filter

  • Zeng, Zheng (College of Electrical Engineering, Zhejiang University) ;
  • Yang, Jia-Qiang (College of Electrical Engineering, Zhejiang University) ;
  • Chen, Shi-Lan (College of Electrical Engineering, Zhejiang University) ;
  • Huang, Jin (College of Electrical Engineering, Zhejiang University)
  • Received : 2013.03.28
  • Accepted : 2013.12.30
  • Published : 2014.03.20
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Abstract

A fast-transient repetitive control strategy for a three-phase shunt active power filter is presented in this study to improve dynamic performance without sacrificing steady-state accuracy. The proposed approach requires one-sixth of the fundamental period required by conventional repetitive control methods as the repetitive control time delay in the synchronous reference frames. Therefore, the proposed method allows the system to achieve a fast dynamic response, and the program occupies minimal storage space. A proportional-integral regulator is also added to the current control loop to eliminate arbitrary-order harmonics and ensure system stability under severe harmonic distortion conditions. The design process of the corrector in the fast-transient repetitive controller is also presented in detail. The LCL filter resonance problem is avoided by the appropriately designed corrector, which increases the margin of system stability and maintains the original compensation current tracking accuracy. Finally, experimental results are presented to verify the feasibility of the proposed strategy.

Keywords

References

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